Version 3.7.0-174.0.dev Merge 5bb9e922dbdcdb38c7c9ac6786fcacb70c769765 into dev

diff --git a/pkg/analysis_server/test/src/computer/closing_labels_computer_test.dart b/pkg/analysis_server/test/src/computer/closing_labels_computer_test.dart
index ec94e57..a3e5424 100644
--- a/pkg/analysis_server/test/src/computer/closing_labels_computer_test.dart
+++ b/pkg/analysis_server/test/src/computer/closing_labels_computer_test.dart

@@ -282,6 +282,42 @@
     _compareLabels(labels, content, expectedLabelCount: 2);
   }
 
+  Future<void> test_nullAwareElement_inList() async {
+    var content = '''
+void myMethod() {
+  return /*1*/new Wrapper(
+    Widget.createWidget(/*2*/<Widget>[
+      1,
+      ?null,
+      2
+    ]/*2:<Widget>[]*/)
+  )/*1:Wrapper*/;
+}
+''';
+
+    var labels = await _computeElements(content);
+    _compareLabels(labels, content, expectedLabelCount: 2);
+  }
+
+  Future<void> test_nullAwareElement_inList_containingList() async {
+    var content = '''
+void myMethod() {
+  return /*1*/new Wrapper(
+    Widget.createWidget(/*2*/<Widget>[
+      1,
+      ?Widget.createWidget(/*3*/<Widget>[
+        3
+      ]/*3:<Widget>[]*/),
+      2
+    ]/*2:<Widget>[]*/)
+  )/*1:Wrapper*/;
+}
+''';
+
+    var labels = await _computeElements(content);
+    _compareLabels(labels, content, expectedLabelCount: 3);
+  }
+
   Future<void> test_prefixedConstConstructor() async {
     var content = """
 import 'dart:async' as a;

diff --git a/tests/language/async/await_syntax_test.dart b/tests/language/async/await_syntax_test.dart
index c7fc8f5..5dbdb3e 100644
--- a/tests/language/async/await_syntax_test.dart
+++ b/tests/language/async/await_syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test async/await syntax.
 
 import 'dart:async' show Stream;

diff --git a/tests/language/async/await_test.dart b/tests/language/async/await_test.dart
index 8ee995b..51d4458 100644
--- a/tests/language/async/await_test.dart
+++ b/tests/language/async/await_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // VMOptions=
 // VMOptions=--optimization-counter-threshold=20
 

diff --git a/tests/language/async/continue_label_test.dart b/tests/language/async/continue_label_test.dart
index 7a7afee..1c78c48 100644
--- a/tests/language/async/continue_label_test.dart
+++ b/tests/language/async/continue_label_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/async_helper.dart";
 import "package:expect/expect.dart";
 

diff --git a/tests/language/async/switch_test.dart b/tests/language/async/switch_test.dart
index 4ef8187..f6a42c3 100644
--- a/tests/language/async/switch_test.dart
+++ b/tests/language/async/switch_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "dart:async";
 import "package:expect/async_helper.dart";
 import "package:expect/expect.dart";

diff --git a/tests/language/async/throw_in_catch_test.dart b/tests/language/async/throw_in_catch_test.dart
index dd977fc..d32438e 100644
--- a/tests/language/async/throw_in_catch_test.dart
+++ b/tests/language/async/throw_in_catch_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "dart:async";
 import "package:expect/async_helper.dart";
 import "package:expect/expect.dart";

diff --git a/tests/language/async_star/async_star_invalid_test.dart b/tests/language/async_star/async_star_invalid_test.dart
index 3345de2..8fad724 100644
--- a/tests/language/async_star/async_star_invalid_test.dart
+++ b/tests/language/async_star/async_star_invalid_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that various invalid uses of `yield` are disallowed.
 
 import "dart:async";

diff --git a/tests/language/call/method_function_typed_value_test.dart b/tests/language/call/method_function_typed_value_test.dart
index 7aa9ed8..98bdaa7 100644
--- a/tests/language/call/method_function_typed_value_test.dart
+++ b/tests/language/call/method_function_typed_value_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program to test arithmetic operations.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 int f(int i) => 2 * i;

diff --git a/tests/language/call/method_implicit_tear_off_test.dart b/tests/language/call/method_implicit_tear_off_test.dart
index 24446cb..6ab3bb3 100644
--- a/tests/language/call/method_implicit_tear_off_test.dart
+++ b/tests/language/call/method_implicit_tear_off_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program to test arithmetic operations.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "dart:async";
 import "package:expect/expect.dart";
 

diff --git a/tests/language/call/method_must_not_be_field_test.dart b/tests/language/call/method_must_not_be_field_test.dart
index 05cbce9..92842ff 100644
--- a/tests/language/call/method_must_not_be_field_test.dart
+++ b/tests/language/call/method_must_not_be_field_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program to test arithmetic operations.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class C {

diff --git a/tests/language/call/method_must_not_be_getter_test.dart b/tests/language/call/method_must_not_be_getter_test.dart
index ac070dd..e942100 100644
--- a/tests/language/call/method_must_not_be_getter_test.dart
+++ b/tests/language/call/method_must_not_be_getter_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program to test arithmetic operations.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class C {

diff --git a/tests/language/call/nonexistent_static_test.dart b/tests/language/call/nonexistent_static_test.dart
index 603bdde..74bf285 100644
--- a/tests/language/call/nonexistent_static_test.dart
+++ b/tests/language/call/nonexistent_static_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // When attempting to call a nonexistent static method, getter or setter, check

diff --git a/tests/language/call/operator_test.dart b/tests/language/call/operator_test.dart
index fc82166..e85d630 100644
--- a/tests/language/call/operator_test.dart
+++ b/tests/language/call/operator_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // simple test with no types in signature

diff --git a/tests/language/class/cycle2_test.dart b/tests/language/class/cycle2_test.dart
index 78f5ff0..fe44caf 100644
--- a/tests/language/class/cycle2_test.dart
+++ b/tests/language/class/cycle2_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Check fail because of cycles in super class relationship.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C extends B {}
 
 class A extends B {}

diff --git a/tests/language/class/cycle_test.dart b/tests/language/class/cycle_test.dart
index dbc11a0..5b022a9 100644
--- a/tests/language/class/cycle_test.dart
+++ b/tests/language/class/cycle_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Check fail because of cycles in super class relationship.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class Foo implements Bar {}

diff --git a/tests/language/class/literal_static_test.dart b/tests/language/class/literal_static_test.dart
index 27b6149..64b2e02 100644
--- a/tests/language/class/literal_static_test.dart
+++ b/tests/language/class/literal_static_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test class literal expressions.

diff --git a/tests/language/class/literal_test.dart b/tests/language/class/literal_test.dart
index 5b1c12a..826b230 100644
--- a/tests/language/class/literal_test.dart
+++ b/tests/language/class/literal_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test class literal expressions.

diff --git a/tests/language/class/syntax_test.dart b/tests/language/class/syntax_test.dart
index e5a2e9b..d674113 100644
--- a/tests/language/class/syntax_test.dart
+++ b/tests/language/class/syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 main() {
   new ClassSyntaxTest();
 }

diff --git a/tests/language/closure/partial_tearoff_instantiation_test.dart b/tests/language/closure/partial_tearoff_instantiation_test.dart
index 3561630..74640a4 100644
--- a/tests/language/closure/partial_tearoff_instantiation_test.dart
+++ b/tests/language/closure/partial_tearoff_instantiation_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 typedef F1 = void Function<T>(T);

diff --git a/tests/language/compile_time_constant/compile_time_constant10_test.dart b/tests/language/compile_time_constant/compile_time_constant10_test.dart
index 19c967a..94abdcd 100644
--- a/tests/language/compile_time_constant/compile_time_constant10_test.dart
+++ b/tests/language/compile_time_constant/compile_time_constant10_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test that 'identical(a,b)' is a compile-time constant.

diff --git a/tests/language/compile_time_constant/compile_time_constant13_test.dart b/tests/language/compile_time_constant/compile_time_constant13_test.dart
index 189abbd..1a781f3 100644
--- a/tests/language/compile_time_constant/compile_time_constant13_test.dart
+++ b/tests/language/compile_time_constant/compile_time_constant13_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   final x; //# 01: ok
   //# 02: compile-time error

diff --git a/tests/language/compile_time_constant/static4_test.dart b/tests/language/compile_time_constant/static4_test.dart
index 8436b05..b3689af 100644
--- a/tests/language/compile_time_constant/static4_test.dart
+++ b/tests/language/compile_time_constant/static4_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   final _x;
   const A.a1(

diff --git a/tests/language/compile_time_constant/static5_test.dart b/tests/language/compile_time_constant/static5_test.dart
index c1666e8..549608c 100644
--- a/tests/language/compile_time_constant/static5_test.dart
+++ b/tests/language/compile_time_constant/static5_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   const A();
 }

diff --git a/tests/language/const/cast1_test.dart b/tests/language/const/cast1_test.dart
index 2363f3f..2e98135 100644
--- a/tests/language/const/cast1_test.dart
+++ b/tests/language/const/cast1_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 /// Implicit casts in constants are supported and treated as compile-time errors
 /// if they are not valid.
 

diff --git a/tests/language/const/cast2_test.dart b/tests/language/const/cast2_test.dart
index 326a884..0eeaac9 100644
--- a/tests/language/const/cast2_test.dart
+++ b/tests/language/const/cast2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 /// Explicit casts in constants are supported and treated as compile-time errors
 /// if they are not valid.
 

diff --git a/tests/language/const/constructor2_test.dart b/tests/language/const/constructor2_test.dart
index e8a5d63..3df9628 100644
--- a/tests/language/const/constructor2_test.dart
+++ b/tests/language/const/constructor2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Regression test for issue 14348.
 
 class A<T> {

diff --git a/tests/language/const/double_in_int_op_test.dart b/tests/language/const/double_in_int_op_test.dart
index 9ff3279..ce95356 100644
--- a/tests/language/const/double_in_int_op_test.dart
+++ b/tests/language/const/double_in_int_op_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 
 main() {
   const dynamic i1 = 3;

diff --git a/tests/language/const/error_multiply_initialized_test.dart b/tests/language/const/error_multiply_initialized_test.dart
index 490ea0f..d6d3b66 100644
--- a/tests/language/const/error_multiply_initialized_test.dart
+++ b/tests/language/const/error_multiply_initialized_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // If a constant constructor contains an initializer, or an initializing
 // formal, for a final field which itself has an initializer at its
 // declaration, then a compile-time error should be reported regardless of

diff --git a/tests/language/const/for_in_variable_test.dart b/tests/language/const/for_in_variable_test.dart
index 2eb63b7..0c0b067 100644
--- a/tests/language/const/for_in_variable_test.dart
+++ b/tests/language/const/for_in_variable_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 main() {
   for (
       const //# 01: compile-time error

diff --git a/tests/language/const/switch_test.dart b/tests/language/const/switch_test.dart
index c4048c7..2f99624 100644
--- a/tests/language/const/switch_test.dart
+++ b/tests/language/const/switch_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/expect.dart';
 
 class C {

diff --git a/tests/language/const/types_test.dart b/tests/language/const/types_test.dart
index 3199c0c..803ff45 100644
--- a/tests/language/const/types_test.dart
+++ b/tests/language/const/types_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test handling of malformed types in constant expressions.
 
 use(x) {}

diff --git a/tests/language/constants_2018/const_type_test.dart b/tests/language/constants_2018/const_type_test.dart
index c6c3f33..d01aee2 100644
--- a/tests/language/constants_2018/const_type_test.dart
+++ b/tests/language/constants_2018/const_type_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests that types do matter when an expression is evaluated as constant.
 
 main() {

diff --git a/tests/language/constants_2018/constant_type_literal_test.dart b/tests/language/constants_2018/constant_type_literal_test.dart
index 99a26db..eacea69 100644
--- a/tests/language/constants_2018/constant_type_literal_test.dart
+++ b/tests/language/constants_2018/constant_type_literal_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests that non-deferred type literals are constant expressions.
 
 import "dart:core";

diff --git a/tests/language/constants_2018/constant_types_test.dart b/tests/language/constants_2018/constant_types_test.dart
index 44a4d5f..427fd43 100644
--- a/tests/language/constants_2018/constant_types_test.dart
+++ b/tests/language/constants_2018/constant_types_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests that in some positions only constant types are allowed, so not
 // type parameters. But in other positions potentially constant types are
 // allowed, including type parameters.

diff --git a/tests/language/constants_2018/equals_test.dart b/tests/language/constants_2018/equals_test.dart
index 1610c45..0bb6672 100644
--- a/tests/language/constants_2018/equals_test.dart
+++ b/tests/language/constants_2018/equals_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests that equality is allowed for receivers of specific types.
 
 import "package:expect/expect.dart";

diff --git a/tests/language/constants_2018/potential_const_dynamic_test.dart b/tests/language/constants_2018/potential_const_dynamic_test.dart
index 228701e..791c74a 100644
--- a/tests/language/constants_2018/potential_const_dynamic_test.dart
+++ b/tests/language/constants_2018/potential_const_dynamic_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests that a dynamic type does not affect whether an expression is
 // potentially constant, the actual type of the value of an expression
 // only matters if the expression is evaluated as a constant.

diff --git a/tests/language/constants_2018/potential_const_type_test.dart b/tests/language/constants_2018/potential_const_type_test.dart
index e4a26ee..eaf6492 100644
--- a/tests/language/constants_2018/potential_const_type_test.dart
+++ b/tests/language/constants_2018/potential_const_type_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests that types do not affect whether an expression is potentially
 // constant, they only matter if the expression is evaluated as a constant.
 

diff --git a/tests/language/constructor/duplicate_final_test.dart b/tests/language/constructor/duplicate_final_test.dart
index 96c1d22..5bdccaf 100644
--- a/tests/language/constructor/duplicate_final_test.dart
+++ b/tests/language/constructor/duplicate_final_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Check that duplicate initialization of a final field is a runtime error.
 
 class Class {

diff --git a/tests/language/constructor/explicit_instantiation_syntax_test.dart b/tests/language/constructor/explicit_instantiation_syntax_test.dart
index 0556da9..18cdfe1 100644
--- a/tests/language/constructor/explicit_instantiation_syntax_test.dart
+++ b/tests/language/constructor/explicit_instantiation_syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:core' hide dynamic;
 import 'dart:core' as core show dynamic;
 

diff --git a/tests/language/constructor/missing_const_constructor_test.dart b/tests/language/constructor/missing_const_constructor_test.dart
index 123eccf..9a5daab 100644
--- a/tests/language/constructor/missing_const_constructor_test.dart
+++ b/tests/language/constructor/missing_const_constructor_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test handling of unknown constructor in const expression.
 
 class GoodClass {

diff --git a/tests/language/constructor/name_test.dart b/tests/language/constructor/name_test.dart
index 43e764f..8599aec 100644
--- a/tests/language/constructor/name_test.dart
+++ b/tests/language/constructor/name_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class Foo {
   Bar.Foo(); //# 01: compile-time error
   factory Bar(); //# 02: syntax error

diff --git a/tests/language/constructor/named_arguments_test.dart b/tests/language/constructor/named_arguments_test.dart
index 369d24b..7d0f0d3 100644
--- a/tests/language/constructor/named_arguments_test.dart
+++ b/tests/language/constructor/named_arguments_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for default constructors.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 late String message;

diff --git a/tests/language/constructor/with_type_parameters_test.dart b/tests/language/constructor/with_type_parameters_test.dart
index 8df1733..974a5b2 100644
--- a/tests/language/constructor/with_type_parameters_test.dart
+++ b/tests/language/constructor/with_type_parameters_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class Bar<T> {
   Bar() {} //# 01: ok
   Bar.boo() {} //# 02: ok

diff --git a/tests/language/control_flow_collections/await_for_syntax_error_test.dart b/tests/language/control_flow_collections/await_for_syntax_error_test.dart
index d64303a..3bfb638 100644
--- a/tests/language/control_flow_collections/await_for_syntax_error_test.dart
+++ b/tests/language/control_flow_collections/await_for_syntax_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   // Use await for in non-async function.
   var _ = [await for (var i in Stream<int>.empty()) i]; //# 01: compile-time error

diff --git a/tests/language/control_flow_collections/await_for_type_error_test.dart b/tests/language/control_flow_collections/await_for_type_error_test.dart
index e63a52e..ef0c5a6 100644
--- a/tests/language/control_flow_collections/await_for_type_error_test.dart
+++ b/tests/language/control_flow_collections/await_for_type_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   () async {
     // Non-Stream type.

diff --git a/tests/language/control_flow_collections/for_const_error_test.dart b/tests/language/control_flow_collections/for_const_error_test.dart
index 3348639..d051af4 100644
--- a/tests/language/control_flow_collections/for_const_error_test.dart
+++ b/tests/language/control_flow_collections/for_const_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   // For cannot be used in a const collection.
   const _ = [for (var i in []) 1]; //# 00: compile-time error

diff --git a/tests/language/control_flow_collections/if_const_error_test.dart b/tests/language/control_flow_collections/if_const_error_test.dart
index bc1d0e2..3f7c100 100644
--- a/tests/language/control_flow_collections/if_const_error_test.dart
+++ b/tests/language/control_flow_collections/if_const_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:collection';
 
 import 'package:expect/expect.dart';

diff --git a/tests/language/control_flow_collections/if_promotion_test.dart b/tests/language/control_flow_collections/if_promotion_test.dart
index 382db01..e569b9c 100644
--- a/tests/language/control_flow_collections/if_promotion_test.dart
+++ b/tests/language/control_flow_collections/if_promotion_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   var a = "a";
 }

diff --git a/tests/language/control_flow_collections/map_set_ambiguity_error_test.dart b/tests/language/control_flow_collections/map_set_ambiguity_error_test.dart
index ae4fee4..32b538fe1 100644
--- a/tests/language/control_flow_collections/map_set_ambiguity_error_test.dart
+++ b/tests/language/control_flow_collections/map_set_ambiguity_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test cases where the syntax is ambiguous between maps and sets when control
 // flow elements contain spreads.
 import 'dart:collection';

diff --git a/tests/language/control_flow_collections/syntax_error_test.dart b/tests/language/control_flow_collections/syntax_error_test.dart
index 8b9fa65..cd95c22 100644
--- a/tests/language/control_flow_collections/syntax_error_test.dart
+++ b/tests/language/control_flow_collections/syntax_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   // No then element.
   var _ = [if (true)]; //# 00: syntax error

diff --git a/tests/language/control_flow_collections/type_error_test.dart b/tests/language/control_flow_collections/type_error_test.dart
index 63f6706..33c1481 100644
--- a/tests/language/control_flow_collections/type_error_test.dart
+++ b/tests/language/control_flow_collections/type_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   // Non-Boolean if condition.
   var _ = <int>[if (1) 2]; //# 00: compile-time error

diff --git a/tests/language/covariant/covariant_test.dart b/tests/language/covariant/covariant_test.dart
index 2ccc708..b342eea 100644
--- a/tests/language/covariant/covariant_test.dart
+++ b/tests/language/covariant/covariant_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that `covariant` can be parsed (and ignored) by
 // dart2js and the VM.
 // This test only checks for non-strong mode behavior.

diff --git a/tests/language/covariant/setter_test.dart b/tests/language/covariant/setter_test.dart
index 81911fd..949e5f2 100644
--- a/tests/language/covariant/setter_test.dart
+++ b/tests/language/covariant/setter_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class A {}

diff --git a/tests/language/deferred/constraints_type_annotation_test.dart b/tests/language/deferred/constraints_type_annotation_test.dart
index 43c8758..9a0d78a 100644
--- a/tests/language/deferred/constraints_type_annotation_test.dart
+++ b/tests/language/deferred/constraints_type_annotation_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/async_helper.dart';
 import 'package:expect/expect.dart';
 

diff --git a/tests/language/deferred/type_dependency_test.dart b/tests/language/deferred/type_dependency_test.dart
index 7d31d5f..e4016dc 100644
--- a/tests/language/deferred/type_dependency_test.dart
+++ b/tests/language/deferred/type_dependency_test.dart

@@ -2,6 +2,9 @@
 // source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 /// Checks that lib1.fooX's dependencies on [A] via is-checks, as-expressions
 /// and type-annotations(in checked-mode) is correctly tracked.
 

diff --git a/tests/language/double_literals/double_literal_coercion_error_test.dart b/tests/language/double_literals/double_literal_coercion_error_test.dart
index 6b574fc..44d2032 100644
--- a/tests/language/double_literals/double_literal_coercion_error_test.dart
+++ b/tests/language/double_literals/double_literal_coercion_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Introduces a context with double as type.
 void notDouble([double value = 0.0]) {
   if (value != 0.0) throw "unreachable";

diff --git a/tests/language/dynamic/prefix_core_test.dart b/tests/language/dynamic/prefix_core_test.dart
index 65da032..a2f56a6 100644
--- a/tests/language/dynamic/prefix_core_test.dart
+++ b/tests/language/dynamic/prefix_core_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Test explicit import of dart:core in the source code..
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 library DynamicPrefixCoreTest.dart;
 
 import "package:expect/expect.dart";

diff --git a/tests/language/enum/duplicate_test.dart b/tests/language/enum/duplicate_test.dart
index 7904652..2c5276e 100644
--- a/tests/language/enum/duplicate_test.dart
+++ b/tests/language/enum/duplicate_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test for duplicate enums.
 
 library enum_duplicate_test;

diff --git a/tests/language/enum/syntax_test.dart b/tests/language/enum/syntax_test.dart
index 250e1ae..e68e7e6 100644
--- a/tests/language/enum/syntax_test.dart
+++ b/tests/language/enum/syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Basic syntax test for enumeration types
 
 enum Color { red, orange, yellow, green }

diff --git a/tests/language/exception/code_after_try_is_executed_test.dart b/tests/language/exception/code_after_try_is_executed_test.dart
index 57ffd84..85293ca 100644
--- a/tests/language/exception/code_after_try_is_executed_test.dart
+++ b/tests/language/exception/code_after_try_is_executed_test.dart

@@ -5,6 +5,9 @@
 // test cannot use Expect.throws, because Expect.throws uses the same
 // pattern.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 main() {

diff --git a/tests/language/exception/try_catch_on_syntax_test.dart b/tests/language/exception/try_catch_on_syntax_test.dart
index 681080d..3d91a8b 100644
--- a/tests/language/exception/try_catch_on_syntax_test.dart
+++ b/tests/language/exception/try_catch_on_syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class MyException {}

diff --git a/tests/language/exception/try_catch_syntax_test.dart b/tests/language/exception/try_catch_syntax_test.dart
index 5a192d1..af95d21 100644
--- a/tests/language/exception/try_catch_syntax_test.dart
+++ b/tests/language/exception/try_catch_syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 main() {
   testMissingCatch();
   testMissingTry();

diff --git a/tests/language/export/duplicate_collision_test.dart b/tests/language/export/duplicate_collision_test.dart
index 5948d9b..2968bc0 100644
--- a/tests/language/export/duplicate_collision_test.dart
+++ b/tests/language/export/duplicate_collision_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'duplicate_import_libd.dart'; //# 01: compile-time error
 
 void main() {}

diff --git a/tests/language/extension_methods/extension_operation_in_const_test.dart b/tests/language/extension_methods/extension_operation_in_const_test.dart
index 4dc4b6a..8a63961 100644
--- a/tests/language/extension_methods/extension_operation_in_const_test.dart
+++ b/tests/language/extension_methods/extension_operation_in_const_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 extension on Object {

diff --git a/tests/language/extension_methods/static_extension_silly_types_test.dart b/tests/language/extension_methods/static_extension_silly_types_test.dart
index 73a079d..ce5dfaf 100644
--- a/tests/language/extension_methods/static_extension_silly_types_test.dart
+++ b/tests/language/extension_methods/static_extension_silly_types_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests extension methods on the non-function, non-class types.
 
 import "dart:async" show FutureOr;

diff --git a/tests/language/external_abstract_fields/abstract_fields_syntax_error_test.dart b/tests/language/external_abstract_fields/abstract_fields_syntax_error_test.dart
index 71998c9..dc89d51 100644
--- a/tests/language/external_abstract_fields/abstract_fields_syntax_error_test.dart
+++ b/tests/language/external_abstract_fields/abstract_fields_syntax_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Check that abstract instance variable declarations are abstract and
 // do not allow more than they should.
 

diff --git a/tests/language/external_abstract_fields/external_fields_syntax_error_test.dart b/tests/language/external_abstract_fields/external_fields_syntax_error_test.dart
index 2ae3671..92fb71c 100644
--- a/tests/language/external_abstract_fields/external_fields_syntax_error_test.dart
+++ b/tests/language/external_abstract_fields/external_fields_syntax_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Check that external variable declarations do not allow more
 // than they should.
 

diff --git a/tests/language/factory/redirection_test.dart b/tests/language/factory/redirection_test.dart
index bddc5368..9a2a663 100644
--- a/tests/language/factory/redirection_test.dart
+++ b/tests/language/factory/redirection_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class A<T> {

diff --git a/tests/language/factory/with_type_parameters_test.dart b/tests/language/factory/with_type_parameters_test.dart
index e0c1583..88fc590 100644
--- a/tests/language/factory/with_type_parameters_test.dart
+++ b/tests/language/factory/with_type_parameters_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class Foo<T> {
   Foo._();
 

diff --git a/tests/language/field/field3_test.dart b/tests/language/field/field3_test.dart
index 901dd06..b6b7098 100644
--- a/tests/language/field/field3_test.dart
+++ b/tests/language/field/field3_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test to catch error reporting bugs in class fields declarations.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class C {

diff --git a/tests/language/field/field6_test.dart b/tests/language/field/field6_test.dart
index fcf0f40..63e3e64 100644
--- a/tests/language/field/field6_test.dart
+++ b/tests/language/field/field6_test.dart

@@ -4,6 +4,9 @@
 // Dart test to catch error reporting bugs in class fields declarations.
 // Should be an error because we have a getter overriding a function name.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   int a() { // //# 00: ok
     return 1;// //# 00: ok

diff --git a/tests/language/field/initialization_order_test.dart b/tests/language/field/initialization_order_test.dart
index 832b712..1144a38 100644
--- a/tests/language/field/initialization_order_test.dart
+++ b/tests/language/field/initialization_order_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test that field initializers are evaluated in the right order.

diff --git a/tests/language/field/override3_test.dart b/tests/language/field/override3_test.dart
index 9b100be..4e948bb 100644
--- a/tests/language/field/override3_test.dart
+++ b/tests/language/field/override3_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we report a compile-time error when a static field conflicts with
 // an inherited instance member of the same name.
 

diff --git a/tests/language/field/override4_test.dart b/tests/language/field/override4_test.dart
index 0ccee61..1558eec 100644
--- a/tests/language/field/override4_test.dart
+++ b/tests/language/field/override4_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we report a compile-time error when an instance field conflicts
 // with an inherited instance method of the same name.
 

diff --git a/tests/language/field/override_test.dart b/tests/language/field/override_test.dart
index 187773b..e362112 100644
--- a/tests/language/field/override_test.dart
+++ b/tests/language/field/override_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Test overriding of fields.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class A {}

diff --git a/tests/language/field/type_check2_test.dart b/tests/language/field/type_check2_test.dart
index 3cd1f00..54061d9 100644
--- a/tests/language/field/type_check2_test.dart
+++ b/tests/language/field/type_check2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   A? a;
 

diff --git a/tests/language/final/syntax_test.dart b/tests/language/final/syntax_test.dart
index 4903587..86d3544 100644
--- a/tests/language/final/syntax_test.dart
+++ b/tests/language/final/syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 main() {

diff --git a/tests/language/function/syntax_test.dart b/tests/language/function/syntax_test.dart
index 3baf2df..77a0ce5 100644
--- a/tests/language/function/syntax_test.dart
+++ b/tests/language/function/syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Tests function statement and expression syntax.

diff --git a/tests/language/function/type_alias5_test.dart b/tests/language/function/type_alias5_test.dart
index 40d6309..6d934ac 100644
--- a/tests/language/function/type_alias5_test.dart
+++ b/tests/language/function/type_alias5_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test for illegally self referencing function type alias.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 typedef Handle Handle(String command); //# 00: compile-time error
 
 typedef F(F x); //# 01: compile-time error

diff --git a/tests/language/function/type_alias7_test.dart b/tests/language/function/type_alias7_test.dart
index ca8fef9..f30b39d 100644
--- a/tests/language/function/type_alias7_test.dart
+++ b/tests/language/function/type_alias7_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 typedef void funcType([int arg]);
 
 typedef void badFuncType([int arg = 0]); //# 00: compile-time error

diff --git a/tests/language/function/type_parameter_bound_object_test.dart b/tests/language/function/type_parameter_bound_object_test.dart
index 61486c2f..48988af 100644
--- a/tests/language/function/type_parameter_bound_object_test.dart
+++ b/tests/language/function/type_parameter_bound_object_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 Q hest<Q>(dynamic x) {
   if (x is Q) return x;
   throw "unreached";

diff --git a/tests/language/generic/closure_test.dart b/tests/language/generic/closure_test.dart
index 3946c10..a7a89c8 100644
--- a/tests/language/generic/closure_test.dart
+++ b/tests/language/generic/closure_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for constructors and initializers.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Check that generic closures are properly instantiated.
 
 import 'package:expect/expect.dart';

diff --git a/tests/language/generic/function_bounds_test.dart b/tests/language/generic/function_bounds_test.dart
index 4ab11d3..5f173fc 100644
--- a/tests/language/generic/function_bounds_test.dart
+++ b/tests/language/generic/function_bounds_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:math';
 import 'package:expect/expect.dart';
 

diff --git a/tests/language/generic/function_dcall_test.dart b/tests/language/generic/function_dcall_test.dart
index 28fa0dc..8a6aa25 100644
--- a/tests/language/generic/function_dcall_test.dart
+++ b/tests/language/generic/function_dcall_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/expect.dart';
 
 void testCallsToGenericFn() {

diff --git a/tests/language/generic/function_typedef_test.dart b/tests/language/generic/function_typedef_test.dart
index a61b0b6..bf9d672 100644
--- a/tests/language/generic/function_typedef_test.dart
+++ b/tests/language/generic/function_typedef_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test for a function type test that cannot be eliminated at compile time.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class A {}

diff --git a/tests/language/generic/generic_test.dart b/tests/language/generic/generic_test.dart
index 16742d5..a7bb660 100644
--- a/tests/language/generic/generic_test.dart
+++ b/tests/language/generic/generic_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 /// Dart test program testing generic type allocations and generic type tests.
 import "package:expect/expect.dart";
 

diff --git a/tests/language/generic/instantiate_to_bounds_super_bounded_test.dart b/tests/language/generic/instantiate_to_bounds_super_bounded_test.dart
index db07f2b..71a1864 100644
--- a/tests/language/generic/instantiate_to_bounds_super_bounded_test.dart
+++ b/tests/language/generic/instantiate_to_bounds_super_bounded_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Verify that when a super-bounded type is produced by instantiate-to-bounds,
 // it's properly allowed or rejected depending on the context in which it's
 // used.

diff --git a/tests/language/generic/method_types_test.dart b/tests/language/generic/method_types_test.dart
index 05c6bf1..66a90df 100644
--- a/tests/language/generic/method_types_test.dart
+++ b/tests/language/generic/method_types_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/expect.dart';
 
 typedef Convert1<O> = O Function<I>(I input);

diff --git a/tests/language/generic/type_parameter_test.dart b/tests/language/generic/type_parameter_test.dart
index 9009863..fe5e7d5 100644
--- a/tests/language/generic/type_parameter_test.dart
+++ b/tests/language/generic/type_parameter_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class A<T> {

diff --git a/tests/language/generic_methods/bounds_test.dart b/tests/language/generic_methods/bounds_test.dart
index 365d0ef..947079e 100644
--- a/tests/language/generic_methods/bounds_test.dart
+++ b/tests/language/generic_methods/bounds_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that a dynamic call to a generic function checks the type argument
 // against its bound.
 

diff --git a/tests/language/generic_methods/dynamic_test.dart b/tests/language/generic_methods/dynamic_test.dart
index 6b92dc3..2564e24 100644
--- a/tests/language/generic_methods/dynamic_test.dart
+++ b/tests/language/generic_methods/dynamic_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that if the type of a parameter of a generic method is a type parameter,
 // the type of the passed argument is checked (01) at compile time
 // if the receiver is given via an interface-type variable, and (02) at runtime

diff --git a/tests/language/generic_methods/overriding_test.dart b/tests/language/generic_methods/overriding_test.dart
index 2ef1def..ac6fd6b 100644
--- a/tests/language/generic_methods/overriding_test.dart
+++ b/tests/language/generic_methods/overriding_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that generic methods can be overloaded (a) with widened type bounds, and
 // (b) using the bound as the type of the parameter in the overloaded method.
 

diff --git a/tests/language/generic_methods/recursive_bound_test.dart b/tests/language/generic_methods/recursive_bound_test.dart
index f79ce20..824df19 100644
--- a/tests/language/generic_methods/recursive_bound_test.dart
+++ b/tests/language/generic_methods/recursive_bound_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that F-bounded quantification works for generic methods, and that types
 // that are passed to generic methods in dynamic calls are checked for being
 // recursively defined.

diff --git a/tests/language/generic_methods/simple_as_expression_test.dart b/tests/language/generic_methods/simple_as_expression_test.dart
index d6b3c48..53007fe 100644
--- a/tests/language/generic_methods/simple_as_expression_test.dart
+++ b/tests/language/generic_methods/simple_as_expression_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that type parameters in generic methods can be used in as-expressions.
 
 library generic_methods_simple_as_expression_test;

diff --git a/tests/language/getter/override2_test.dart b/tests/language/getter/override2_test.dart
index 95519a2..47d2b21 100644
--- a/tests/language/getter/override2_test.dart
+++ b/tests/language/getter/override2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we report a compile-time error when an instance getter conflicts
 // with an inherited instance method of the same name.
 

diff --git a/tests/language/getter/override_test.dart b/tests/language/getter/override_test.dart
index 8e17d33..e207650 100644
--- a/tests/language/getter/override_test.dart
+++ b/tests/language/getter/override_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we report a compile-time error when a static getter conflicts with
 // an inherited instance member of the same name.
 

diff --git a/tests/language/identifier/built_in_identifier_test.dart b/tests/language/identifier/built_in_identifier_test.dart
index bab2510..23d3d36 100644
--- a/tests/language/identifier/built_in_identifier_test.dart
+++ b/tests/language/identifier/built_in_identifier_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Check that we can use pseudo keywords as names in function level code.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class PseudoKWTest {

diff --git a/tests/language/identifier/built_in_not_prefix_test.dart b/tests/language/identifier/built_in_not_prefix_test.dart
index 0225875..74b521e 100644
--- a/tests/language/identifier/built_in_not_prefix_test.dart
+++ b/tests/language/identifier/built_in_not_prefix_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // From The Dart Programming Language Specification, section 16.33
 // "Identifier Reference":
 //

diff --git a/tests/language/identifier/built_in_type_annotation_test.dart b/tests/language/identifier/built_in_type_annotation_test.dart
index 7410ff7..6a934d1 100644
--- a/tests/language/identifier/built_in_type_annotation_test.dart
+++ b/tests/language/identifier/built_in_type_annotation_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // From The Dart Programming Language Specification, section 16.33
 // "Identifier Reference":
 //

diff --git a/tests/language/identifier/known_usage_test.dart b/tests/language/identifier/known_usage_test.dart
index 360869b..ea921f9 100644
--- a/tests/language/identifier/known_usage_test.dart
+++ b/tests/language/identifier/known_usage_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // The identifiers listed below are mentioned in the grammar, but none of
 // them is a reserved word or a built-in identifier. Such an identifier can
 // be used just like all other identifiers, with a few exceptions. Here are

diff --git a/tests/language/identity/const_test.dart b/tests/language/identity/const_test.dart
index 9c62b06..eac8ba3 100644
--- a/tests/language/identity/const_test.dart
+++ b/tests/language/identity/const_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/expect.dart';
 
 f() {}

diff --git a/tests/language/if_null/assignment_static_test.dart b/tests/language/if_null/assignment_static_test.dart
index 7eee56b..c2a3570 100644
--- a/tests/language/if_null/assignment_static_test.dart
+++ b/tests/language/if_null/assignment_static_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Verify that the static type of a ??= b is the least upper bound of the
 // static types of a and b.
 

diff --git a/tests/language/implicit_creation/implicit_const_context_not_test.dart b/tests/language/implicit_creation/implicit_const_context_not_test.dart
index 83d75ea..65987bc 100644
--- a/tests/language/implicit_creation/implicit_const_context_not_test.dart
+++ b/tests/language/implicit_creation/implicit_const_context_not_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Check places that are *not* supposed to be constant contexts,

diff --git a/tests/language/implicit_creation/implicit_const_not_default_values_test.dart b/tests/language/implicit_creation/implicit_const_not_default_values_test.dart
index 3968dea..7234be9 100644
--- a/tests/language/implicit_creation/implicit_const_not_default_values_test.dart
+++ b/tests/language/implicit_creation/implicit_const_not_default_values_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests that const/new-insertion does the right thing for default values.
 // A default-value expression does not introduce a const context.
 

diff --git a/tests/language/interface/cycle_test.dart b/tests/language/interface/cycle_test.dart
index 316790e..44d125e3 100644
--- a/tests/language/interface/cycle_test.dart
+++ b/tests/language/interface/cycle_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Check fail because of cycles in super interface relationship.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C implements B {}
 
 class A implements B {}

diff --git a/tests/language/interface/duplicate_implements_test.dart b/tests/language/interface/duplicate_implements_test.dart
index 41c10fa..68103e8 100644
--- a/tests/language/interface/duplicate_implements_test.dart
+++ b/tests/language/interface/duplicate_implements_test.dart

@@ -4,6 +4,9 @@
 // Check that duplicate types in implements/extends list are
 // compile-time errors.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 abstract class I {}
 
 abstract class J {}

diff --git a/tests/language/is/is4_test.dart b/tests/language/is/is4_test.dart
index b560557..3918a44 100644
--- a/tests/language/is/is4_test.dart
+++ b/tests/language/is/is4_test.dart

@@ -5,6 +5,9 @@
 // Regression test for issue 5216.
 // VMOptions=--optimization-counter-threshold=10 --no-use-osr --no-background-compilation
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class Foo<T> {

diff --git a/tests/language/library/ambiguous_test.dart b/tests/language/library/ambiguous_test.dart
index 1c2cd6b..be665c2 100644
--- a/tests/language/library/ambiguous_test.dart
+++ b/tests/language/library/ambiguous_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // This test should fail to load because we are importing two libraries
 // which define the same top level name foo, and we are referring to the name.
 

diff --git a/tests/language/library/library_test.dart b/tests/language/library/library_test.dart
index 6dd7428..e056434 100644
--- a/tests/language/library/library_test.dart
+++ b/tests/language/library/library_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "nonexistent_library.dart"; //# 01: compile-time error
 
 main() {

diff --git a/tests/language/list/literal4_test.dart b/tests/language/list/literal4_test.dart
index 72a31d1..5d05af9 100644
--- a/tests/language/list/literal4_test.dart
+++ b/tests/language/list/literal4_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class ListLiteral4Test<T> {

diff --git a/tests/language/list/literal_syntax_test.dart b/tests/language/list/literal_syntax_test.dart
index 652d1b1..05d87b9 100644
--- a/tests/language/list/literal_syntax_test.dart
+++ b/tests/language/list/literal_syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 abstract class I {}

diff --git a/tests/language/main/main_test.dart b/tests/language/main/main_test.dart
index 6b5c24c..72a4015 100644
--- a/tests/language/main/main_test.dart
+++ b/tests/language/main/main_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 main(
 
 a //        //# 01: ok

diff --git a/tests/language/main/no_main_test.dart b/tests/language/main/no_main_test.dart
index 0700b65..b3971fe 100644
--- a/tests/language/main/no_main_test.dart
+++ b/tests/language/main/no_main_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 /* //# 01: static type warning, runtime error
 main() {}
 */ //# 01: continued

diff --git a/tests/language/malbounded/redirecting_factory_test.dart b/tests/language/malbounded/redirecting_factory_test.dart
index 9d2d8a9..8636666 100644
--- a/tests/language/malbounded/redirecting_factory_test.dart
+++ b/tests/language/malbounded/redirecting_factory_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A<
     Ta
            extends num // //# 02: continued

diff --git a/tests/language/malformed/bound_test.dart b/tests/language/malformed/bound_test.dart
index 035cedf..ac84244 100644
--- a/tests/language/malformed/bound_test.dart
+++ b/tests/language/malformed/bound_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C<T
     extends Malformed  //# 00: compile-time error
     > {

diff --git a/tests/language/malformed/malformed2_test.dart b/tests/language/malformed/malformed2_test.dart
index 79061c2..bd94208 100644
--- a/tests/language/malformed/malformed2_test.dart
+++ b/tests/language/malformed/malformed2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 library malformed_test;
 
 // This part includes the actual tests.

diff --git a/tests/language/map/literal11_test.dart b/tests/language/map/literal11_test.dart
index 93643eb..daaab71 100644
--- a/tests/language/map/literal11_test.dart
+++ b/tests/language/map/literal11_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test the use type arguments on constant maps.
 
 library map_literal11_test;

diff --git a/tests/language/map/literal3_test.dart b/tests/language/map/literal3_test.dart
index 517ef90..cf7df6d 100644
--- a/tests/language/map/literal3_test.dart
+++ b/tests/language/map/literal3_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Test program for map literals.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class MapLiteralTest {

diff --git a/tests/language/map/literal4_test.dart b/tests/language/map/literal4_test.dart
index 9358e59..cd186a4 100644
--- a/tests/language/map/literal4_test.dart
+++ b/tests/language/map/literal4_test.dart

@@ -5,6 +5,9 @@
 //
 // Dart test program testing type checks in map literals.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class MapLiteral4Test<T> {

diff --git a/tests/language/metadata/cyclic_test.dart b/tests/language/metadata/cyclic_test.dart
index 6ff4798..8270fd1 100644
--- a/tests/language/metadata/cyclic_test.dart
+++ b/tests/language/metadata/cyclic_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Check that metadata on a class 'Super' using subtypes of 'Super' are not
 // considered as cyclic inheritance or lead to crashes.
 

diff --git a/tests/language/metadata/scope1_test.dart b/tests/language/metadata/scope1_test.dart
index 6af9844..6207a7b 100644
--- a/tests/language/metadata/scope1_test.dart
+++ b/tests/language/metadata/scope1_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that a type variable is not in scope for metadata declared on the type
 // declaration.
 

diff --git a/tests/language/metadata/scope2_test.dart b/tests/language/metadata/scope2_test.dart
index 7a66a38..a871729 100644
--- a/tests/language/metadata/scope2_test.dart
+++ b/tests/language/metadata/scope2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that a type variable is not in scope for metadata declared on the type
 // declaration.
 

diff --git a/tests/language/method/override2_test.dart b/tests/language/method/override2_test.dart
index 9db40ee..c79dc65 100644
--- a/tests/language/method/override2_test.dart
+++ b/tests/language/method/override2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Checks that an overriding method has compatible parameters.
 
 abstract class I {

diff --git a/tests/language/method/override7_test.dart b/tests/language/method/override7_test.dart
index 51588d5..cc28ed4 100644
--- a/tests/language/method/override7_test.dart
+++ b/tests/language/method/override7_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we report a compile-time error when a static function conflicts
 // with an inherited instance member of the same name.
 

diff --git a/tests/language/method/override8_test.dart b/tests/language/method/override8_test.dart
index 677952d..d254ffc 100644
--- a/tests/language/method/override8_test.dart
+++ b/tests/language/method/override8_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we report a compile-time error when an instance method conflicts
 // with an inherited instance field or getter of the same name.
 

diff --git a/tests/language/mixin/deny_listed_test.dart b/tests/language/mixin/deny_listed_test.dart
index 5a4e570..0f5107a 100644
--- a/tests/language/mixin/deny_listed_test.dart
+++ b/tests/language/mixin/deny_listed_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Check mixin of deny-listed types.
 
 import 'package:expect/expect.dart';

diff --git a/tests/language/mixin/forwarding_constructor4_test.dart b/tests/language/mixin/forwarding_constructor4_test.dart
index a521675..f8cbc82 100644
--- a/tests/language/mixin/forwarding_constructor4_test.dart
+++ b/tests/language/mixin/forwarding_constructor4_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Verify that a forwarding constructor is generated even when there is an
 // optional parameter.
 

diff --git a/tests/language/mixin/illegal_syntax_test.dart b/tests/language/mixin/illegal_syntax_test.dart
index 2237320..c2cba8b 100644
--- a/tests/language/mixin/illegal_syntax_test.dart
+++ b/tests/language/mixin/illegal_syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class S { }
 class G<T> { }
 mixin M { }

diff --git a/tests/language/mixin/invalid_bound2_test.dart b/tests/language/mixin/invalid_bound2_test.dart
index 77e8713..93f87f3 100644
--- a/tests/language/mixin/invalid_bound2_test.dart
+++ b/tests/language/mixin/invalid_bound2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class S0<T> {}
 
 class S<U extends num, V extends U> extends S0<String> {}

diff --git a/tests/language/mixin/invalid_bound_test.dart b/tests/language/mixin/invalid_bound_test.dart
index f42c075..38b646d 100644
--- a/tests/language/mixin/invalid_bound_test.dart
+++ b/tests/language/mixin/invalid_bound_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class S0<T> {}
 
 class S<T extends num> extends S0<String> {}

diff --git a/tests/language/mixin/invalid_inheritance1_test.dart b/tests/language/mixin/invalid_inheritance1_test.dart
index 23c689a..725d486 100644
--- a/tests/language/mixin/invalid_inheritance1_test.dart
+++ b/tests/language/mixin/invalid_inheritance1_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C<T> extends Object
   with Malformed // //# 01: compile-time error
   with T //         //# 02: compile-time error

diff --git a/tests/language/mixin/invalid_inheritance2_test.dart b/tests/language/mixin/invalid_inheritance2_test.dart
index fd2ce5b..0fe98f4 100644
--- a/tests/language/mixin/invalid_inheritance2_test.dart
+++ b/tests/language/mixin/invalid_inheritance2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C<T> = Object with Malformed; // //# 01: compile-time error
 class C<T> = Object with T; //         //# 02: compile-time error
 class C<T> = OBject with T<int>; //    //# 03: compile-time error

diff --git a/tests/language/mixin/type_parameter_inference_error_test.dart b/tests/language/mixin/type_parameter_inference_error_test.dart
index c720e49..c177c36 100644
--- a/tests/language/mixin/type_parameter_inference_error_test.dart
+++ b/tests/language/mixin/type_parameter_inference_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 abstract class A<T> {}
 
 class B {}

diff --git a/tests/language/mixin_declaration/mixin_declaration_invalid_application_supertype_test.dart b/tests/language/mixin_declaration/mixin_declaration_invalid_application_supertype_test.dart
index 08e33a6..1a2c7d3 100644
--- a/tests/language/mixin_declaration/mixin_declaration_invalid_application_supertype_test.dart
+++ b/tests/language/mixin_declaration/mixin_declaration_invalid_application_supertype_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test various invalid mixin applications where the supertype doesn't

diff --git a/tests/language/mixin_declaration/mixin_declaration_invalid_superinvocation_test.dart b/tests/language/mixin_declaration/mixin_declaration_invalid_superinvocation_test.dart
index 8e5e9ae..a40be85 100644
--- a/tests/language/mixin_declaration/mixin_declaration_invalid_superinvocation_test.dart
+++ b/tests/language/mixin_declaration/mixin_declaration_invalid_superinvocation_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test various invalid super-invocations for mixin declarations.
 
 abstract class UnaryInt {

diff --git a/tests/language/mixin_declaration/mixin_declaration_invalid_syntax_test.dart b/tests/language/mixin_declaration/mixin_declaration_invalid_syntax_test.dart
index 0ff26d6..789a753 100644
--- a/tests/language/mixin_declaration/mixin_declaration_invalid_syntax_test.dart
+++ b/tests/language/mixin_declaration/mixin_declaration_invalid_syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test various invalid syntax combinations.

diff --git a/tests/language/mixin_declaration/mixin_declaration_invalid_type_test.dart b/tests/language/mixin_declaration/mixin_declaration_invalid_type_test.dart
index 0fad558..f0ce5fc 100644
--- a/tests/language/mixin_declaration/mixin_declaration_invalid_type_test.dart
+++ b/tests/language/mixin_declaration/mixin_declaration_invalid_type_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test various invalid type-declaration combinations.

diff --git a/tests/language/mixin_declaration/mixin_declaration_invalid_usage_test.dart b/tests/language/mixin_declaration/mixin_declaration_invalid_usage_test.dart
index 83e50b4d..5b44223 100644
--- a/tests/language/mixin_declaration/mixin_declaration_invalid_usage_test.dart
+++ b/tests/language/mixin_declaration/mixin_declaration_invalid_usage_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 mixin Mixin // cannot `extend` anything.
   extends M //# 01: compile-time error
   extends Object //# 02: compile-time error

diff --git a/tests/language/mixin_declaration/mixin_declaration_superinvocation_application_test.dart b/tests/language/mixin_declaration/mixin_declaration_superinvocation_application_test.dart
index eee21d8..880b5a0 100644
--- a/tests/language/mixin_declaration/mixin_declaration_superinvocation_application_test.dart
+++ b/tests/language/mixin_declaration/mixin_declaration_superinvocation_application_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test various invalid mixin applications due to insufficient super-invoked
 // methods.
 

diff --git a/tests/language/mixin_declaration/mixin_declaration_supertype_compatible_test.dart b/tests/language/mixin_declaration/mixin_declaration_supertype_compatible_test.dart
index 5307979..29ad023 100644
--- a/tests/language/mixin_declaration/mixin_declaration_supertype_compatible_test.dart
+++ b/tests/language/mixin_declaration/mixin_declaration_supertype_compatible_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test various invalid super-constraints for mixin declarations.

diff --git a/tests/language/mixin_legacy/invalid_inheritance2_test.dart b/tests/language/mixin_legacy/invalid_inheritance2_test.dart
index ed27a45..c73092e 100644
--- a/tests/language/mixin_legacy/invalid_inheritance2_test.dart
+++ b/tests/language/mixin_legacy/invalid_inheritance2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C<T> = Object with Malformed; // //# 01: compile-time error
 class C<T> = Object with T; //         //# 02: compile-time error
 class C<T> = OBject with T<int>; //    //# 03: compile-time error

diff --git a/tests/language/nnbd/resolution/question_dot_produces_nullable_type_test.dart b/tests/language/nnbd/resolution/question_dot_produces_nullable_type_test.dart
index 1df74a7..590fe08 100644
--- a/tests/language/nnbd/resolution/question_dot_produces_nullable_type_test.dart
+++ b/tests/language/nnbd/resolution/question_dot_produces_nullable_type_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 bool c = false;
 

diff --git a/tests/language/nnbd/static_errors/await_in_late_local_variable_initializer_test.dart b/tests/language/nnbd/static_errors/await_in_late_local_variable_initializer_test.dart
index 910106a..f2f9dc1 100644
--- a/tests/language/nnbd/static_errors/await_in_late_local_variable_initializer_test.dart
+++ b/tests/language/nnbd/static_errors/await_in_late_local_variable_initializer_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is a compile time error for a `late` variable initializer
 // to use the `await` expression.

diff --git a/tests/language/nnbd/static_errors/default_value_on_required_parameter_test.dart b/tests/language/nnbd/static_errors/default_value_on_required_parameter_test.dart
index 29ab688..55d004d 100644
--- a/tests/language/nnbd/static_errors/default_value_on_required_parameter_test.dart
+++ b/tests/language/nnbd/static_errors/default_value_on_required_parameter_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error if a required named parameter has a default value.
 main() {}

diff --git a/tests/language/nnbd/static_errors/implicit_downcasts.dart b/tests/language/nnbd/static_errors/implicit_downcasts.dart
index b19ce47..7fc4b3d 100644
--- a/tests/language/nnbd/static_errors/implicit_downcasts.dart
+++ b/tests/language/nnbd/static_errors/implicit_downcasts.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error to do what was once allowed as an "implicit
 // downcast."

diff --git a/tests/language/nnbd/static_errors/late_final_field_with_const_constructor_test.dart b/tests/language/nnbd/static_errors/late_final_field_with_const_constructor_test.dart
index d7b3898..b2d4d6e 100644
--- a/tests/language/nnbd/static_errors/late_final_field_with_const_constructor_test.dart
+++ b/tests/language/nnbd/static_errors/late_final_field_with_const_constructor_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is not a compile time error for a `final` variable to not have
 // an initializer if that variable is declared as `late`.

diff --git a/tests/language/nnbd/static_errors/missing_default_value_for_parameter_test.dart b/tests/language/nnbd/static_errors/missing_default_value_for_parameter_test.dart
index 08b7053..8f5c624 100644
--- a/tests/language/nnbd/static_errors/missing_default_value_for_parameter_test.dart
+++ b/tests/language/nnbd/static_errors/missing_default_value_for_parameter_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error if an optional parameter (named or otherwise) with
 // no default value has a potentially non-nullable type.

diff --git a/tests/language/nnbd/static_errors/missing_required_argument_test.dart b/tests/language/nnbd/static_errors/missing_required_argument_test.dart
index f1201b5..ae79f64 100644
--- a/tests/language/nnbd/static_errors/missing_required_argument_test.dart
+++ b/tests/language/nnbd/static_errors/missing_required_argument_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error if a named parameter that is part of a required
 // group is not bound to an argument at a call site.

diff --git a/tests/language/nnbd/static_errors/non_null_assertion_test.dart b/tests/language/nnbd/static_errors/non_null_assertion_test.dart
index d12230c..a0bc38a 100644
--- a/tests/language/nnbd/static_errors/non_null_assertion_test.dart
+++ b/tests/language/nnbd/static_errors/non_null_assertion_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   void x;
   int i;

diff --git a/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_else_test.dart b/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_else_test.dart
index 74c16a1..b83d2e9 100644
--- a/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_else_test.dart
+++ b/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_else_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // It is an error if a potentially non-nullable local variable which has no
 // initializer expression and is not marked `late` is used before it is

diff --git a/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_then_test.dart b/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_then_test.dart
index 8a959fb..2a79864 100644
--- a/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_then_test.dart
+++ b/tests/language/nnbd/static_errors/not_assigned_local_if_then_else_then_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // It is an error if a potentially non-nullable local variable which has no
 // initializer expression and is not marked `late` is used before it is

diff --git a/tests/language/nnbd/static_errors/not_assigned_local_if_then_test.dart b/tests/language/nnbd/static_errors/not_assigned_local_if_then_test.dart
index 986b661..00186bd 100644
--- a/tests/language/nnbd/static_errors/not_assigned_local_if_then_test.dart
+++ b/tests/language/nnbd/static_errors/not_assigned_local_if_then_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // It is an error if a potentially non-nullable local variable which has no
 // initializer expression and is not marked `late` is used before it is

diff --git a/tests/language/nnbd/static_errors/not_assigned_local_initializer_test.dart b/tests/language/nnbd/static_errors/not_assigned_local_initializer_test.dart
index 1edcb9c..cc6baf3 100644
--- a/tests/language/nnbd/static_errors/not_assigned_local_initializer_test.dart
+++ b/tests/language/nnbd/static_errors/not_assigned_local_initializer_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // It is an error if a potentially non-nullable local variable which has no
 // initializer expression and is not marked `late` is used before it is

diff --git a/tests/language/nnbd/static_errors/not_assigned_local_try_catch_body_test.dart b/tests/language/nnbd/static_errors/not_assigned_local_try_catch_body_test.dart
index e5ddbcf..153a01d 100644
--- a/tests/language/nnbd/static_errors/not_assigned_local_try_catch_body_test.dart
+++ b/tests/language/nnbd/static_errors/not_assigned_local_try_catch_body_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // It is an error if a potentially non-nullable local variable which has no
 // initializer expression and is not marked `late` is used before it is

diff --git a/tests/language/nnbd/static_errors/not_assigned_local_while_true_break_before_test.dart b/tests/language/nnbd/static_errors/not_assigned_local_while_true_break_before_test.dart
index 1e0bbe8..04121e0 100644
--- a/tests/language/nnbd/static_errors/not_assigned_local_while_true_break_before_test.dart
+++ b/tests/language/nnbd/static_errors/not_assigned_local_while_true_break_before_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // It is an error if a potentially non-nullable local variable which has no
 // initializer expression and is not marked `late` is used before it is

diff --git a/tests/language/nnbd/static_errors/not_initialized_non_nullable_instance_field_test.dart b/tests/language/nnbd/static_errors/not_initialized_non_nullable_instance_field_test.dart
index 6ce0735..478910e 100644
--- a/tests/language/nnbd/static_errors/not_initialized_non_nullable_instance_field_test.dart
+++ b/tests/language/nnbd/static_errors/not_initialized_non_nullable_instance_field_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error if an instance field with potentially non-nullable
 // type has no initializer expression and is not initialized in a constructor

diff --git a/tests/language/nnbd/static_errors/not_initialized_non_nullable_static_field_test.dart b/tests/language/nnbd/static_errors/not_initialized_non_nullable_static_field_test.dart
index 4a5d076..f399f9c 100644
--- a/tests/language/nnbd/static_errors/not_initialized_non_nullable_static_field_test.dart
+++ b/tests/language/nnbd/static_errors/not_initialized_non_nullable_static_field_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error if a static field non-nullable type has no
 // initializer expression.

diff --git a/tests/language/nnbd/static_errors/not_initialized_non_nullable_top_test.dart b/tests/language/nnbd/static_errors/not_initialized_non_nullable_top_test.dart
index 57c92c0..8d7b987 100644
--- a/tests/language/nnbd/static_errors/not_initialized_non_nullable_top_test.dart
+++ b/tests/language/nnbd/static_errors/not_initialized_non_nullable_top_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error if a top level variable with non-nullable type has
 // no initializer expression.

diff --git a/tests/language/nnbd/static_errors/nullable_function_types_test.dart b/tests/language/nnbd/static_errors/nullable_function_types_test.dart
index 12f2fc9..c8be9bb 100644
--- a/tests/language/nnbd/static_errors/nullable_function_types_test.dart
+++ b/tests/language/nnbd/static_errors/nullable_function_types_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 class C {
   call() {}

diff --git a/tests/language/nnbd/static_errors/nullable_supertype_test.dart b/tests/language/nnbd/static_errors/nullable_supertype_test.dart
index a632383..a2c4f75 100644
--- a/tests/language/nnbd/static_errors/nullable_supertype_test.dart
+++ b/tests/language/nnbd/static_errors/nullable_supertype_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error to use a nullable type as a supertype.
 import 'package:expect/expect.dart';

diff --git a/tests/language/nnbd/static_errors/subtype_of_never_test.dart b/tests/language/nnbd/static_errors/subtype_of_never_test.dart
index 6361562..0aac201 100644
--- a/tests/language/nnbd/static_errors/subtype_of_never_test.dart
+++ b/tests/language/nnbd/static_errors/subtype_of_never_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error for a class to extend, implement, or mixin the type
 // Never.

diff --git a/tests/language/nnbd/static_errors/this_reference_in_late_field_test.dart b/tests/language/nnbd/static_errors/this_reference_in_late_field_test.dart
index 3c3efd1..6f379c0 100644
--- a/tests/language/nnbd/static_errors/this_reference_in_late_field_test.dart
+++ b/tests/language/nnbd/static_errors/this_reference_in_late_field_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 import "package:expect/expect.dart";
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   final c = C();
   Expect.identical(c, c);

diff --git a/tests/language/nnbd/static_errors/throw_of_invalid_type_test.dart b/tests/language/nnbd/static_errors/throw_of_invalid_type_test.dart
index 9a20a36..804ef6f 100644
--- a/tests/language/nnbd/static_errors/throw_of_invalid_type_test.dart
+++ b/tests/language/nnbd/static_errors/throw_of_invalid_type_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error if the static type of `e` in the expression
 // `throw e` is not assignable to `Object`.

diff --git a/tests/language/nnbd/static_errors/unchecked_use_of_nullable_cascaded_test.dart b/tests/language/nnbd/static_errors/unchecked_use_of_nullable_cascaded_test.dart
index 5773c43..24fdb86 100644
--- a/tests/language/nnbd/static_errors/unchecked_use_of_nullable_cascaded_test.dart
+++ b/tests/language/nnbd/static_errors/unchecked_use_of_nullable_cascaded_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Test that it is an error to use nullable types in unsound ways.
 void main() {

diff --git a/tests/language/nnbd/static_errors/unchecked_use_of_nullable_test.dart b/tests/language/nnbd/static_errors/unchecked_use_of_nullable_test.dart
index 6c8c4a2..11552b1 100644
--- a/tests/language/nnbd/static_errors/unchecked_use_of_nullable_test.dart
+++ b/tests/language/nnbd/static_errors/unchecked_use_of_nullable_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/async_helper.dart';
 
 // Test that it is an error to use nullable types in unsound ways.

diff --git a/tests/language/nnbd/static_errors/use_nnbd_sdk_test.dart b/tests/language/nnbd/static_errors/use_nnbd_sdk_test.dart
index 1f65c6a..03294a6 100644
--- a/tests/language/nnbd/static_errors/use_nnbd_sdk_test.dart
+++ b/tests/language/nnbd/static_errors/use_nnbd_sdk_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 import "package:expect/expect.dart";
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
 }
 

diff --git a/tests/language/nnbd/subtyping/regress41939_test.dart b/tests/language/nnbd/subtyping/regress41939_test.dart
index fd40999..8d4b1e7 100644
--- a/tests/language/nnbd/subtyping/regress41939_test.dart
+++ b/tests/language/nnbd/subtyping/regress41939_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Requirements=nnbd-strong
 
 // Regression test for https://github.com/dart-lang/sdk/issues/41939

diff --git a/tests/language/nnbd/syntax/late_modifier_error_test.dart b/tests/language/nnbd/syntax/late_modifier_error_test.dart
index 05ce870..f4ee509 100644
--- a/tests/language/nnbd/syntax/late_modifier_error_test.dart
+++ b/tests/language/nnbd/syntax/late_modifier_error_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Invalid uses of "late" modifier
 

diff --git a/tests/language/nnbd/syntax/nullable_type_error_test.dart b/tests/language/nnbd/syntax/nullable_type_error_test.dart
index 01112ab..14c70b2 100644
--- a/tests/language/nnbd/syntax/nullable_type_error_test.dart
+++ b/tests/language/nnbd/syntax/nullable_type_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:core';
 import 'dart:core' as core;
 

diff --git a/tests/language/nnbd/syntax/required_modifier_error_test.dart b/tests/language/nnbd/syntax/required_modifier_error_test.dart
index 24ac35d..76491ff 100644
--- a/tests/language/nnbd/syntax/required_modifier_error_test.dart
+++ b/tests/language/nnbd/syntax/required_modifier_error_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 // Invalid uses of "required" modifier
 

diff --git a/tests/language/nnbd/type_promotion/assignment_test.dart b/tests/language/nnbd/type_promotion/assignment_test.dart
index 1c085e0..d3e2403 100644
--- a/tests/language/nnbd/type_promotion/assignment_test.dart
+++ b/tests/language/nnbd/type_promotion/assignment_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   if (x is String) {

diff --git a/tests/language/nnbd/type_promotion/do_condition_is_not_type_test.dart b/tests/language/nnbd/type_promotion/do_condition_is_not_type_test.dart
index f011765..6599597 100644
--- a/tests/language/nnbd/type_promotion/do_condition_is_not_type_test.dart
+++ b/tests/language/nnbd/type_promotion/do_condition_is_not_type_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   do {

diff --git a/tests/language/nnbd/type_promotion/do_condition_is_type_test.dart b/tests/language/nnbd/type_promotion/do_condition_is_type_test.dart
index db7988c..02a58b8 100644
--- a/tests/language/nnbd/type_promotion/do_condition_is_type_test.dart
+++ b/tests/language/nnbd/type_promotion/do_condition_is_type_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   do {

diff --git a/tests/language/nnbd/type_promotion/function_expression_is_type_mutated_in_closure_test.dart b/tests/language/nnbd/type_promotion/function_expression_is_type_mutated_in_closure_test.dart
index c527f6f..219975e 100644
--- a/tests/language/nnbd/type_promotion/function_expression_is_type_mutated_in_closure_test.dart
+++ b/tests/language/nnbd/type_promotion/function_expression_is_type_mutated_in_closure_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f() {
   void g(Object x) {

diff --git a/tests/language/nnbd/type_promotion/function_expression_outer_is_type_assigned_outside_test.dart b/tests/language/nnbd/type_promotion/function_expression_outer_is_type_assigned_outside_test.dart
index aeaa801..08ea88c 100644
--- a/tests/language/nnbd/type_promotion/function_expression_outer_is_type_assigned_outside_test.dart
+++ b/tests/language/nnbd/type_promotion/function_expression_outer_is_type_assigned_outside_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   late void Function() g;

diff --git a/tests/language/nnbd/type_promotion/if_is_not_type_test.dart b/tests/language/nnbd/type_promotion/if_is_not_type_test.dart
index 16b109a..1ab99da 100644
--- a/tests/language/nnbd/type_promotion/if_is_not_type_test.dart
+++ b/tests/language/nnbd/type_promotion/if_is_not_type_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   if (x is! String) {

diff --git a/tests/language/nnbd/type_promotion/if_is_type_test.dart b/tests/language/nnbd/type_promotion/if_is_type_test.dart
index 6285019..c1e87b8 100644
--- a/tests/language/nnbd/type_promotion/if_is_type_test.dart
+++ b/tests/language/nnbd/type_promotion/if_is_type_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   if (x is String) {

diff --git a/tests/language/nnbd/type_promotion/try_catch_assigned_body_test.dart b/tests/language/nnbd/type_promotion/try_catch_assigned_body_test.dart
index baf4866..92d4da6 100644
--- a/tests/language/nnbd/type_promotion/try_catch_assigned_body_test.dart
+++ b/tests/language/nnbd/type_promotion/try_catch_assigned_body_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   if (x is! String) return;

diff --git a/tests/language/nnbd/type_promotion/try_catch_is_not_type_exit_body_test.dart b/tests/language/nnbd/type_promotion/try_catch_is_not_type_exit_body_test.dart
index 7e9066a..2491c6c 100644
--- a/tests/language/nnbd/type_promotion/try_catch_is_not_type_exit_body_test.dart
+++ b/tests/language/nnbd/type_promotion/try_catch_is_not_type_exit_body_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   try {

diff --git a/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_body_test.dart b/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_body_test.dart
index 3ce4f78..2f7e75f 100644
--- a/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_body_test.dart
+++ b/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_body_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   if (x is String) {

diff --git a/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_finally_test.dart b/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_finally_test.dart
index 9722738..e55f837 100644
--- a/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_finally_test.dart
+++ b/tests/language/nnbd/type_promotion/try_finally_outer_is_type_assigned_finally_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   if (x is String) {

diff --git a/tests/language/nnbd/type_promotion/while_condition_false_test.dart b/tests/language/nnbd/type_promotion/while_condition_false_test.dart
index 1d76b9d..7993027 100644
--- a/tests/language/nnbd/type_promotion/while_condition_false_test.dart
+++ b/tests/language/nnbd/type_promotion/while_condition_false_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   while (x is! String) {

diff --git a/tests/language/nnbd/type_promotion/while_condition_true_test.dart b/tests/language/nnbd/type_promotion/while_condition_true_test.dart
index b29dfc3..4ebf2a7 100644
--- a/tests/language/nnbd/type_promotion/while_condition_true_test.dart
+++ b/tests/language/nnbd/type_promotion/while_condition_true_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
 
 void f(Object x) {
   while (x is String) {

diff --git a/tests/language/no_such_method/no_such_method_private_setter_lib.dart b/tests/language/no_such_method/no_such_method_private_setter_lib.dart
index 4f3ecb33..763d314 100644
--- a/tests/language/no_such_method/no_such_method_private_setter_lib.dart
+++ b/tests/language/no_such_method/no_such_method_private_setter_lib.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class Bar {
   int _x = -1;
 }

diff --git a/tests/language/no_such_method/private_setter_test.dart b/tests/language/no_such_method/private_setter_test.dart
index 0f110bb..c65ecd2 100644
--- a/tests/language/no_such_method/private_setter_test.dart
+++ b/tests/language/no_such_method/private_setter_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'no_such_method_private_setter_lib.dart';
 
 class Foo implements Bar {}

diff --git a/tests/language/nosuchmethod_forwarding/nosuchmethod_forwarding_test.dart b/tests/language/nosuchmethod_forwarding/nosuchmethod_forwarding_test.dart
index d54a784..4f7868e 100644
--- a/tests/language/nosuchmethod_forwarding/nosuchmethod_forwarding_test.dart
+++ b/tests/language/nosuchmethod_forwarding/nosuchmethod_forwarding_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Testing that `noSuchMethod` appears to use implicit forwarders (we don't
 // care how it's actually implemented, but it should look like that).
 

diff --git a/tests/language/operator/bit_operations_test.dart b/tests/language/operator/bit_operations_test.dart
index 06ce14c..e2503d0 100644
--- a/tests/language/operator/bit_operations_test.dart
+++ b/tests/language/operator/bit_operations_test.dart

@@ -4,6 +4,9 @@
 // Dart test for testing bitwise operations.
 // VMOptions=--optimization-counter-threshold=10 --no-use-osr --no-background-compilation
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 void main() {

diff --git a/tests/language/operator/literal_unary_plus_test.dart b/tests/language/operator/literal_unary_plus_test.dart
index 8a2530d..c7d9af1 100644
--- a/tests/language/operator/literal_unary_plus_test.dart
+++ b/tests/language/operator/literal_unary_plus_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // There is no unary plus operator in Dart.
 
 main() {

diff --git a/tests/language/operator/unsigned_right_shift_test.dart b/tests/language/operator/unsigned_right_shift_test.dart
index d476f1a..f3646a3 100644
--- a/tests/language/operator/unsigned_right_shift_test.dart
+++ b/tests/language/operator/unsigned_right_shift_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/async_helper.dart";
 import "package:expect/expect.dart";
 

diff --git a/tests/language/override/field_test.dart b/tests/language/override/field_test.dart
index 739eacd..34d87fe 100644
--- a/tests/language/override/field_test.dart
+++ b/tests/language/override/field_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test checking that static/instance field shadowing do not conflict.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   int instanceFieldInA = 0;
   static int staticFieldInA = 0;

diff --git a/tests/language/override/inheritance_field_test.dart b/tests/language/override/inheritance_field_test.dart
index 871f1f1..b7c3a65 100644
--- a/tests/language/override/inheritance_field_test.dart
+++ b/tests/language/override/inheritance_field_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   get getter1 => null; //# 01: ok
   num get getter2 => 0; //# 02: ok

diff --git a/tests/language/override/inheritance_generic_test.dart b/tests/language/override/inheritance_generic_test.dart
index 6256bc8..d797183 100644
--- a/tests/language/override/inheritance_generic_test.dart
+++ b/tests/language/override/inheritance_generic_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A<T> {
   void method1(T t) => null; //# 01: ok
   void method2(T t) => null; //# 02: compile-time error

diff --git a/tests/language/override/inheritance_method2_test.dart b/tests/language/override/inheritance_method2_test.dart
index e22571f3e..1756ab6 100644
--- a/tests/language/override/inheritance_method2_test.dart
+++ b/tests/language/override/inheritance_method2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 main() {
   new C();
 }

diff --git a/tests/language/override/inheritance_method_test.dart b/tests/language/override/inheritance_method_test.dart
index a7870e9..2da631c 100644
--- a/tests/language/override/inheritance_method_test.dart
+++ b/tests/language/override/inheritance_method_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test static warnings for method overrides.
 
 class A {

diff --git a/tests/language/override/inheritance_mixed_test.dart b/tests/language/override/inheritance_mixed_test.dart
index d4218d6..82d1789 100644
--- a/tests/language/override/inheritance_mixed_test.dart
+++ b/tests/language/override/inheritance_mixed_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   var member1; //# 01: compile-time error
   member2() {} //# 02: compile-time error

diff --git a/tests/language/override/inheritance_no_such_method_test.dart b/tests/language/override/inheritance_no_such_method_test.dart
index 535f5a4..a17ac32 100644
--- a/tests/language/override/inheritance_no_such_method_test.dart
+++ b/tests/language/override/inheritance_no_such_method_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test use of noSuchMethod in relation to abstract methods in
 // concrete classes.
 

diff --git a/tests/language/override/inheritance_setter_test.dart b/tests/language/override/inheritance_setter_test.dart
index 5aa2cca..518109f 100644
--- a/tests/language/override/inheritance_setter_test.dart
+++ b/tests/language/override/inheritance_setter_test.dart

@@ -1,3 +1,10 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 main() {
   new C();
 }

diff --git a/tests/language/parameter/default_test.dart b/tests/language/parameter/default_test.dart
index 10a40a0..ab4c3e2 100644
--- a/tests/language/parameter/default_test.dart
+++ b/tests/language/parameter/default_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C {
   foo(a
       = 1 // //# 02: syntax error

diff --git a/tests/language/parameter/metadata_test.dart b/tests/language/parameter/metadata_test.dart
index a2ab741..f78b342 100644
--- a/tests/language/parameter/metadata_test.dart
+++ b/tests/language/parameter/metadata_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that metadata annotations can be handled on nested parameters.
 
 test(

diff --git a/tests/language/part/missing_part_of_tag_test.dart b/tests/language/part/missing_part_of_tag_test.dart
index ea91f42..9c4f6c2 100644
--- a/tests/language/part/missing_part_of_tag_test.dart
+++ b/tests/language/part/missing_part_of_tag_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test for missing part-of tag.
 
 library lib;

diff --git a/tests/language/part/part2_test.dart b/tests/language/part/part2_test.dart
index 706bc1f..71ac8cb 100644
--- a/tests/language/part/part2_test.dart
+++ b/tests/language/part/part2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 library org.dartlang.test.part2_test;
 
 part "part.dart"; //# 01: compile-time error

diff --git a/tests/language/prefix/identifier_reference_test.dart b/tests/language/prefix/identifier_reference_test.dart
index e59b6fe..7f42294 100644
--- a/tests/language/prefix/identifier_reference_test.dart
+++ b/tests/language/prefix/identifier_reference_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Validate the following spec text from section 16.32 (Identifier Reference):
 //     Evaluation of an identifier expression e of the form id proceeds as
 //   follows:

diff --git a/tests/language/redirecting/factory_bounds_test.dart b/tests/language/redirecting/factory_bounds_test.dart
index fcc2f54..b10e2d2 100644
--- a/tests/language/redirecting/factory_bounds_test.dart
+++ b/tests/language/redirecting/factory_bounds_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Bounds checking on redirecting factories.
 
 class Foo<T> {}

diff --git a/tests/language/redirecting/factory_infinite_steps_test.dart b/tests/language/redirecting/factory_infinite_steps_test.dart
index d70a86f..f8250dc 100644
--- a/tests/language/redirecting/factory_infinite_steps_test.dart
+++ b/tests/language/redirecting/factory_infinite_steps_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // From Dart Language Specification, 0.12 M1, "7.6.2 Factories": It is
 // a compile-time error if a redirecting factory constructor does not
 // redirect to a non-redirecting factory constructor or to a

diff --git a/tests/language/redirecting/factory_upcast_test.dart b/tests/language/redirecting/factory_upcast_test.dart
index ff3ad11..3295df4 100644
--- a/tests/language/redirecting/factory_upcast_test.dart
+++ b/tests/language/redirecting/factory_upcast_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A implements B {
   var x;
   A(Object this.x);

diff --git a/tests/language/regress/regress22780_test.dart b/tests/language/regress/regress22780_test.dart
index 34dabd6..c080605 100644
--- a/tests/language/regress/regress22780_test.dart
+++ b/tests/language/regress/regress22780_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 main() {
   f() => "Oh, the joy of ${f()}"; print(f()); //# 01: runtime error
 }

diff --git a/tests/language/regress/regress23051_test.dart b/tests/language/regress/regress23051_test.dart
index f9837de..e8d1d35 100644
--- a/tests/language/regress/regress23051_test.dart
+++ b/tests/language/regress/regress23051_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Regression test for issue 23051.
 
 main() {

diff --git a/tests/language/regress/regress23500_test.dart b/tests/language/regress/regress23500_test.dart
index 6278fd6..43fcf04 100644
--- a/tests/language/regress/regress23500_test.dart
+++ b/tests/language/regress/regress23500_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "dart:async";
 import "package:expect/expect.dart";
 

diff --git a/tests/language/regress/regress24935_test.dart b/tests/language/regress/regress24935_test.dart
index 22c37d4..c55ab40 100644
--- a/tests/language/regress/regress24935_test.dart
+++ b/tests/language/regress/regress24935_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:async';
 import 'package:expect/async_helper.dart';
 

diff --git a/tests/language/regress/regress28217_test.dart b/tests/language/regress/regress28217_test.dart
index a49876f..8c43512 100644
--- a/tests/language/regress/regress28217_test.dart
+++ b/tests/language/regress/regress28217_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test non-existing redirecting constructor and
 // redirecting to a factory constructor.
 

diff --git a/tests/language/regress/regress28268_test.dart b/tests/language/regress/regress28268_test.dart
index a2a0bd5..af6b9f9 100644
--- a/tests/language/regress/regress28268_test.dart
+++ b/tests/language/regress/regress28268_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/expect.dart';
 
 class E {

diff --git a/tests/language/regress/regress31596_override_test.dart b/tests/language/regress/regress31596_override_test.dart
index 592ae44..0e16afc 100644
--- a/tests/language/regress/regress31596_override_test.dart
+++ b/tests/language/regress/regress31596_override_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class I0 {}
 
 class A {}

diff --git a/tests/language/regress/regress32660_test.dart b/tests/language/regress/regress32660_test.dart
index 081e4d2..a589c94 100644
--- a/tests/language/regress/regress32660_test.dart
+++ b/tests/language/regress/regress32660_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // noSuchMethod does not overwrite actual implementations, so if an
 // implementation of a member exists that doesn't fulfill the interface it's
 // an error.

diff --git a/tests/language/regress/regress34225_test.dart b/tests/language/regress/regress34225_test.dart
index 0117672..dcfd78e 100644
--- a/tests/language/regress/regress34225_test.dart
+++ b/tests/language/regress/regress34225_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C {
   static set C(v) {} //# 01: compile-time error
   set C(v) {} //# 02: compile-time error

diff --git a/tests/language/regress/regress6725_test.dart b/tests/language/regress/regress6725_test.dart
index 96df166..e7e8505 100644
--- a/tests/language/regress/regress6725_test.dart
+++ b/tests/language/regress/regress6725_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Regression test for a crash in dart2js.
 
 library crash_6725;

diff --git a/tests/language/script/script2_test.dart b/tests/language/script/script2_test.dart
index 958ac20..68ee41a 100644
--- a/tests/language/script/script2_test.dart
+++ b/tests/language/script/script2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 /// Part file has library and import directives.
 
 // TODO(rnystrom): Using a multitest instead of making this a static error test

diff --git a/tests/language/set_literals/invalid_set_literal_test.dart b/tests/language/set_literals/invalid_set_literal_test.dart
index 3030d53..1494813 100644
--- a/tests/language/set_literals/invalid_set_literal_test.dart
+++ b/tests/language/set_literals/invalid_set_literal_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "dart:collection" show HashSet, LinkedHashSet;
 
 import "package:expect/expect.dart";

diff --git a/tests/language/setter/override2_test.dart b/tests/language/setter/override2_test.dart
index 80902b7..375715a 100644
--- a/tests/language/setter/override2_test.dart
+++ b/tests/language/setter/override2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we do not report a compile-time error when an instance setter named
 // foo= is declared in a class inheriting an instance method, field, or getter
 // named foo, or an instance setter named foo=.

diff --git a/tests/language/setter/override_test.dart b/tests/language/setter/override_test.dart
index 88d7402..698c091 100644
--- a/tests/language/setter/override_test.dart
+++ b/tests/language/setter/override_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we do not report a compile-time error when a static setter named
 // foo= is declared in a class inheriting an instance method or getter named
 // foo, and that we do report an error if an instance setter named foo= or

diff --git a/tests/language/spread_collections/const_error_test.dart b/tests/language/spread_collections/const_error_test.dart
index e9fcfd2..8d3c649 100644
--- a/tests/language/spread_collections/const_error_test.dart
+++ b/tests/language/spread_collections/const_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:collection';
 
 import 'helper_classes.dart';

diff --git a/tests/language/spread_collections/map_set_ambiguity_error_test.dart b/tests/language/spread_collections/map_set_ambiguity_error_test.dart
index 00f40a8..9107f99 100644
--- a/tests/language/spread_collections/map_set_ambiguity_error_test.dart
+++ b/tests/language/spread_collections/map_set_ambiguity_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test cases where the syntax is ambiguous between maps and sets.
 import 'dart:collection';
 

diff --git a/tests/language/spread_collections/syntax_error_test.dart b/tests/language/spread_collections/syntax_error_test.dart
index 825e5dd2..df9a401 100644
--- a/tests/language/spread_collections/syntax_error_test.dart
+++ b/tests/language/spread_collections/syntax_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   // Spread nothing.
   var _ = [...]; //# 00: syntax error

diff --git a/tests/language/spread_collections/type_error_test.dart b/tests/language/spread_collections/type_error_test.dart
index 3fe731a..04cc3dd 100644
--- a/tests/language/spread_collections/type_error_test.dart
+++ b/tests/language/spread_collections/type_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 void main() {
   // Spread non-iterable or non-map.
   var _ = [...(3)]; //# 00: compile-time error

diff --git a/tests/language/stack_trace/rethrow_error_test.dart b/tests/language/stack_trace/rethrow_error_test.dart
index ae1f042..8acab9f 100644
--- a/tests/language/stack_trace/rethrow_error_test.dart
+++ b/tests/language/stack_trace/rethrow_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class SubclassOfError extends Error {}
 
 fail() => throw "Fail";

diff --git a/tests/language/static/field_test.dart b/tests/language/static/field_test.dart
index ed054f6..929338c 100644
--- a/tests/language/static/field_test.dart
+++ b/tests/language/static/field_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for testing setting/getting/initializing static fields.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class First {

diff --git a/tests/language/static/parameter_test.dart b/tests/language/static/parameter_test.dart
index 24ccbf7..710aacd 100644
--- a/tests/language/static/parameter_test.dart
+++ b/tests/language/static/parameter_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 foo(x
     , static int y // //# 01: syntax error
     , final static y // //# 02: syntax error

diff --git a/tests/language/static/setter_conflicts_test.dart b/tests/language/static/setter_conflicts_test.dart
index c8e4395..1c7fcc3 100644
--- a/tests/language/static/setter_conflicts_test.dart
+++ b/tests/language/static/setter_conflicts_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class C {
   static set foo(int x) {}
 

diff --git a/tests/language/super/bound_closure_test.dart b/tests/language/super/bound_closure_test.dart
index f70256c..dcbc624 100644
--- a/tests/language/super/bound_closure_test.dart
+++ b/tests/language/super/bound_closure_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class A {

diff --git a/tests/language/super/operator_index_test.dart b/tests/language/super/operator_index_test.dart
index 81dd172..0c6207b 100644
--- a/tests/language/super/operator_index_test.dart
+++ b/tests/language/super/operator_index_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that we emit errors for unresolved indexing operations on super.
 
 class A {

diff --git a/tests/language/superinterface_variance/abstract_class_error_test.dart b/tests/language/superinterface_variance/abstract_class_error_test.dart
index 47367d1..2ea9668 100644
--- a/tests/language/superinterface_variance/abstract_class_error_test.dart
+++ b/tests/language/superinterface_variance/abstract_class_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 typedef F1<X> = void Function(X);
 typedef F2<X> = X Function(X);
 typedef F3<X> = void Function<Y extends X>();

diff --git a/tests/language/superinterface_variance/abstract_mixin_application_error_test.dart b/tests/language/superinterface_variance/abstract_mixin_application_error_test.dart
index 0362eab..05386b4 100644
--- a/tests/language/superinterface_variance/abstract_mixin_application_error_test.dart
+++ b/tests/language/superinterface_variance/abstract_mixin_application_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 typedef F1<X> = void Function(X);
 typedef F2<X> = X Function(X);
 typedef F3<X> = void Function<Y extends X>();

diff --git a/tests/language/superinterface_variance/concrete_class_error_test.dart b/tests/language/superinterface_variance/concrete_class_error_test.dart
index 3d8ac1e..76416f9 100644
--- a/tests/language/superinterface_variance/concrete_class_error_test.dart
+++ b/tests/language/superinterface_variance/concrete_class_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 typedef F1<X> = void Function(X);
 typedef F2<X> = X Function(X);
 typedef F3<X> = void Function<Y extends X>();

diff --git a/tests/language/superinterface_variance/concrete_mixin_application_error_test.dart b/tests/language/superinterface_variance/concrete_mixin_application_error_test.dart
index b9b658d..2461c99 100644
--- a/tests/language/superinterface_variance/concrete_mixin_application_error_test.dart
+++ b/tests/language/superinterface_variance/concrete_mixin_application_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 typedef F1<X> = void Function(X);
 typedef F2<X> = X Function(X);
 typedef F3<X> = void Function<Y extends X>();

diff --git a/tests/language/superinterface_variance/mixin_error_test.dart b/tests/language/superinterface_variance/mixin_error_test.dart
index 14963f3..d0ac9a7 100644
--- a/tests/language/superinterface_variance/mixin_error_test.dart
+++ b/tests/language/superinterface_variance/mixin_error_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 typedef F1<X> = void Function(X);
 typedef F2<X> = X Function(X);
 typedef F3<X> = void Function<Y extends X>();

diff --git a/tests/language/sync_star/generator2_test.dart b/tests/language/sync_star/generator2_test.dart
index 051b6b2..f83261c 100644
--- a/tests/language/sync_star/generator2_test.dart
+++ b/tests/language/sync_star/generator2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Simple test program for sync* generator functions.
 
 import "package:expect/expect.dart";

diff --git a/tests/language/sync_star/generator3_test.dart b/tests/language/sync_star/generator3_test.dart
index d8646df..7f4a745 100644
--- a/tests/language/sync_star/generator3_test.dart
+++ b/tests/language/sync_star/generator3_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test program for sync* generator functions and yielding in try blocks.
 
 import "package:expect/expect.dart";

diff --git a/tests/language/sync_star/yield_test.dart b/tests/language/sync_star/yield_test.dart
index 77e5594..51300d2 100644
--- a/tests/language/sync_star/yield_test.dart
+++ b/tests/language/sync_star/yield_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // TODO(jmesserly): this is a copy of the language test of the same name,
 // we can remove this copy when we're running against those tests.
 import "package:expect/expect.dart";

diff --git a/tests/language/syntax/deep_nesting_expression_test.dart b/tests/language/syntax/deep_nesting_expression_test.dart
index 5ab1db5..83c2da8 100644
--- a/tests/language/syntax/deep_nesting_expression_test.dart
+++ b/tests/language/syntax/deep_nesting_expression_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Deeply nested expression must not crash compiler due to stack overflow.
 
 main() {

diff --git a/tests/language/syntax/deep_nesting_statement_test.dart b/tests/language/syntax/deep_nesting_statement_test.dart
index bb00024..5b6842c 100644
--- a/tests/language/syntax/deep_nesting_statement_test.dart
+++ b/tests/language/syntax/deep_nesting_statement_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Deeply nested statements must not crash compiler due to stack overflow.
 
 var x = 0;

diff --git a/tests/language/syntax/syntax_test.dart b/tests/language/syntax/syntax_test.dart
index cc02c92..6339a36 100644
--- a/tests/language/syntax/syntax_test.dart
+++ b/tests/language/syntax/syntax_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class SyntaxTest {
   // "this" cannot be used as a field name.
   SyntaxTest this; //# 01: syntax error

diff --git a/tests/language/syntax/unbalanced_brace_test.dart b/tests/language/syntax/unbalanced_brace_test.dart
index 5e889ccc..8a09c6c 100644
--- a/tests/language/syntax/unbalanced_brace_test.dart
+++ b/tests/language/syntax/unbalanced_brace_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test syntax errors related to unterminated braces.
 
 class A {

diff --git a/tests/language/this/in_initializer_test.dart b/tests/language/this/in_initializer_test.dart
index 554c15c..1a7c5c9 100644
--- a/tests/language/this/in_initializer_test.dart
+++ b/tests/language/this/in_initializer_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class A {
   static String? s = "something";
   var a = "anything";

diff --git a/tests/language/top_level/collision1_test.dart b/tests/language/top_level/collision1_test.dart
index f8d97c4b..8423636 100644
--- a/tests/language/top_level/collision1_test.dart
+++ b/tests/language/top_level/collision1_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 int x = 100;
 
 get x => 200; //                //# 00: compile-time error

diff --git a/tests/language/top_level/collision2_test.dart b/tests/language/top_level/collision2_test.dart
index 0d9734e..b389446 100644
--- a/tests/language/top_level/collision2_test.dart
+++ b/tests/language/top_level/collision2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 get x => 200;
 
 // Ok: can have a setter named x when getter x is defined.

diff --git a/tests/language/type/alias_equality_test.dart b/tests/language/type/alias_equality_test.dart
index 7ee087a..a9638e5 100644
--- a/tests/language/type/alias_equality_test.dart
+++ b/tests/language/type/alias_equality_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that type aliases perform equality tests according to the
 // underlying function type, not as if they were a distinct type
 // for each type alias declaration.

diff --git a/tests/language/type/constants_test.dart b/tests/language/type/constants_test.dart
index 9c83212..f1266c0 100644
--- a/tests/language/type/constants_test.dart
+++ b/tests/language/type/constants_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that the value of constant type literals are allowed as
 // constant map keys and case expressions, and the value of non-constant type
 // literals are not.

diff --git a/tests/language/type_variable/bounds_test.dart b/tests/language/type_variable/bounds_test.dart
index c23942d..6bc2c16 100644
--- a/tests/language/type_variable/bounds_test.dart
+++ b/tests/language/type_variable/bounds_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test of parameterized factory methods.
 
 class Foo<T extends num> {

diff --git a/tests/language/type_variable/nested_test.dart b/tests/language/type_variable/nested_test.dart
index 423ce6d..c32ada6 100644
--- a/tests/language/type_variable/nested_test.dart
+++ b/tests/language/type_variable/nested_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Regression test for
 // http://code.google.com/p/dart/issues/detail?id=9050.
 

diff --git a/tests/language/typedef/cyclic_test.dart b/tests/language/typedef/cyclic_test.dart
index 6da9ad6..39e6cd1 100644
--- a/tests/language/typedef/cyclic_test.dart
+++ b/tests/language/typedef/cyclic_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Check that cyclic reference of a typedef is a compile-time error.
 
 // To test various cyclic references the definition of the [:typedef A():] is

diff --git a/tests/language/unsorted/arg_param_trailing_comma_test.dart b/tests/language/unsorted/arg_param_trailing_comma_test.dart
index 9119dfa..88bdddc 100644
--- a/tests/language/unsorted/arg_param_trailing_comma_test.dart
+++ b/tests/language/unsorted/arg_param_trailing_comma_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for testing params.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Convenience values.
 var c = new C();
 var x = 42;

diff --git a/tests/language/unsorted/cast_test.dart b/tests/language/unsorted/cast_test.dart
index 5f14ccd..205b4c7 100644
--- a/tests/language/unsorted/cast_test.dart
+++ b/tests/language/unsorted/cast_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for constructors and initializers.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 // Test 'expression as Type' casts.

diff --git a/tests/language/unsorted/cyclic_type_test.dart b/tests/language/unsorted/cyclic_type_test.dart
index 5a9c320..9d7e288 100644
--- a/tests/language/unsorted/cyclic_type_test.dart
+++ b/tests/language/unsorted/cyclic_type_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Prevent obfuscation:
 // dart2jsOptions=--no-minify
 

diff --git a/tests/language/unsorted/default_implementation2_test.dart b/tests/language/unsorted/default_implementation2_test.dart
index 0a3607c..b804179 100644
--- a/tests/language/unsorted/default_implementation2_test.dart
+++ b/tests/language/unsorted/default_implementation2_test.dart

@@ -3,6 +3,9 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test to verify incompatible constructor types
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 abstract class Point {
   factory Point(int x, int y) = PointImplementation; //# 01: ok
   factory Point(x, y) = PointImplementation; //# 02: compile-time error

diff --git a/tests/language/unsorted/extend_type_parameter_test.dart b/tests/language/unsorted/extend_type_parameter_test.dart
index 58991f5..6f5ccbe 100644
--- a/tests/language/unsorted/extend_type_parameter_test.dart
+++ b/tests/language/unsorted/extend_type_parameter_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Extending a type parameter is not allowed.
 
 abstract class A<T> extends T {} // //# 00: compile-time error

diff --git a/tests/language/unsorted/fuzzy_arrows_test.dart b/tests/language/unsorted/fuzzy_arrows_test.dart
index 4cbe86c..840c0b5 100644
--- a/tests/language/unsorted/fuzzy_arrows_test.dart
+++ b/tests/language/unsorted/fuzzy_arrows_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Fuzzy arrows will be eliminated from Dart 2.0 soon.  This test checks that
 // implementations have properly removed fuzzy arrow support, both at compile
 // time and at run time.  See dartbug.com/29630 for a detailed explanation.

diff --git a/tests/language/unsorted/illegal_declaration_test.dart b/tests/language/unsorted/illegal_declaration_test.dart
index 6b8714b..79f98ee 100644
--- a/tests/language/unsorted/illegal_declaration_test.dart
+++ b/tests/language/unsorted/illegal_declaration_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 [ //# 01: syntax error
 
 main() {}

diff --git a/tests/language/unsorted/keyword_type_expression_test.dart b/tests/language/unsorted/keyword_type_expression_test.dart
index 5d981ef..5703324 100644
--- a/tests/language/unsorted/keyword_type_expression_test.dart
+++ b/tests/language/unsorted/keyword_type_expression_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that a keyword can't be used as type.  Serves as regression test for
 // crashes in dart2js.
 

diff --git a/tests/language/variable/conflicting_type_variable_and_setter_test.dart b/tests/language/variable/conflicting_type_variable_and_setter_test.dart
index 1ec0ee6..09dec2a 100644
--- a/tests/language/variable/conflicting_type_variable_and_setter_test.dart
+++ b/tests/language/variable/conflicting_type_variable_and_setter_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class C<

diff --git a/tests/language/variable/cyclic_type_variable_test.dart b/tests/language/variable/cyclic_type_variable_test.dart
index 78b2512..8c7818b 100644
--- a/tests/language/variable/cyclic_type_variable_test.dart
+++ b/tests/language/variable/cyclic_type_variable_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Tests cyclic reference to type variables in type expressions
 
 class Base<T> {}

diff --git a/tests/language/variable/fixed_type_variable2_test.dart b/tests/language/variable/fixed_type_variable2_test.dart
index 0cb6790..481dc56 100644
--- a/tests/language/variable/fixed_type_variable2_test.dart
+++ b/tests/language/variable/fixed_type_variable2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that type variables are passed on from subtypes that fixed the type
 // variable in inheritance.
 

diff --git a/tests/language/variable/fixed_type_variable_test.dart b/tests/language/variable/fixed_type_variable_test.dart
index 24dc231..0065f93 100644
--- a/tests/language/variable/fixed_type_variable_test.dart
+++ b/tests/language/variable/fixed_type_variable_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Test that type variables are passed on from subtypes that fixed the type
 // variable in inheritance.
 

diff --git a/tests/language/variable/variable_declaration_metadata_test.dart b/tests/language/variable/variable_declaration_metadata_test.dart
index 24793de..f2d9501 100644
--- a/tests/language/variable/variable_declaration_metadata_test.dart
+++ b/tests/language/variable/variable_declaration_metadata_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Verify that the individual variable declarations inside a variable
 // declaration list are not allowed to be annotated with metadata.
 

diff --git a/tests/language/vm/bool_check_stack_traces_test.dart b/tests/language/vm/bool_check_stack_traces_test.dart
index 4daab74..18caae5 100644
--- a/tests/language/vm/bool_check_stack_traces_test.dart
+++ b/tests/language/vm/bool_check_stack_traces_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 import "package:expect/variations.dart";
 
@@ -102,9 +105,9 @@
 }
 
 main() {
-  testStackTrace(test1, [10, 19]);
-  testStackTrace(test2, [27, 36]);
-  testStackTrace(test3, [46, 55]);
-  testStackTrace(test4, [61]); //# 01: ok
-  testStackTrace(test5, [68]); //# 02: ok
+  testStackTrace(test1, [13, 22]);
+  testStackTrace(test2, [30, 39]);
+  testStackTrace(test3, [49, 58]);
+  testStackTrace(test4, [64]); //# 01: ok
+  testStackTrace(test5, [71]); //# 02: ok
 }

diff --git a/tests/language/vm/regress_33469_test.dart b/tests/language/vm/regress_33469_test.dart
index 831704e..d3c6a1c 100644
--- a/tests/language/vm/regress_33469_test.dart
+++ b/tests/language/vm/regress_33469_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 class X {
   final x;
   const X(this.x);

diff --git a/tests/language/vm/regression_32912_test.dart b/tests/language/vm/regression_32912_test.dart
index 2a63ff6..fe7544a 100644
--- a/tests/language/vm/regression_32912_test.dart
+++ b/tests/language/vm/regression_32912_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 dynamic _defaultCallback<T>(T t) => t;
 
 void bar<T>([dynamic Function(T) f = _defaultCallback]) {}  //# 01: compile-time error

diff --git a/tests/language/vm/symbols_test.dart b/tests/language/vm/symbols_test.dart
index d605a3a..89ae47f 100644
--- a/tests/language/vm/symbols_test.dart
+++ b/tests/language/vm/symbols_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'package:expect/expect.dart';
 
 void main() {

diff --git a/tests/language/vm/type_vm_test.dart b/tests/language/vm/type_vm_test.dart
index 14189b6..aa3017d 100644
--- a/tests/language/vm/type_vm_test.dart
+++ b/tests/language/vm/type_vm_test.dart

@@ -4,6 +4,9 @@
 // VMOptions=--enable_type_checks --enable_asserts --no_show_internal_names
 // Dart test program testing type checks.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import "package:expect/expect.dart";
 
 class C {

diff --git a/tests/language/void/return_future_future_or_void_async_error1_test.dart b/tests/language/void/return_future_future_or_void_async_error1_test.dart
index daf1667..9aaec08 100644
--- a/tests/language/void/return_future_future_or_void_async_error1_test.dart
+++ b/tests/language/void/return_future_future_or_void_async_error1_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:async';
 
 void main() {

diff --git a/tests/language/void/return_future_or_future_or_void_sync_error2_test.dart b/tests/language/void/return_future_or_future_or_void_sync_error2_test.dart
index 6a09786..54efb25 100644
--- a/tests/language/void/return_future_or_future_or_void_sync_error2_test.dart
+++ b/tests/language/void/return_future_or_future_or_void_sync_error2_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:async';
 
 void main() {

diff --git a/tests/language/void/return_future_or_void_sync_error4_test.dart b/tests/language/void/return_future_or_void_sync_error4_test.dart
index c1defcb..c62cc69 100644
--- a/tests/language/void/return_future_or_void_sync_error4_test.dart
+++ b/tests/language/void/return_future_or_void_sync_error4_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 import 'dart:async';
 
 void main() {

diff --git a/tests/language/void/void_block_return_test.dart b/tests/language/void/void_block_return_test.dart
index 8dd8bad..1f6a60a 100644
--- a/tests/language/void/void_block_return_test.dart
+++ b/tests/language/void/void_block_return_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Testing that a void block function is not allowed to `return e`
 // where `e` is non-void.
 

diff --git a/tests/language/void/void_type_function_types_test.dart b/tests/language/void/void_type_function_types_test.dart
index db4f880..ecb174b 100644
--- a/tests/language/void/void_type_function_types_test.dart
+++ b/tests/language/void/void_type_function_types_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Dart test for type checks involving the void type in function types.
 
 import 'package:expect/expect.dart';

diff --git a/tests/language/void/void_type_override_test.dart b/tests/language/void/void_type_override_test.dart
index d4749ad..b734780 100644
--- a/tests/language/void/void_type_override_test.dart
+++ b/tests/language/void/void_type_override_test.dart

@@ -2,6 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Formatting can break multitests, so don't format them.
+// dart format off
+
 // Dart test for type checks involving the void type and overriding.
 
 import 'package:expect/expect.dart';

diff --git a/tools/VERSION b/tools/VERSION
index bf0a92d..6650f8c 100644
--- a/tools/VERSION
+++ b/tools/VERSION

@@ -27,5 +27,5 @@
 MAJOR 3
 MINOR 7
 PATCH 0
-PRERELEASE 173
+PRERELEASE 174
 PRERELEASE_PATCH 0