Fixed Issue #465: tests for overriding with NNBD re-named and corrected.
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t05.dart b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t01.dart
similarity index 61%
rename from LanguageFeatures/nnbd/override_checking_A02_t05.dart
rename to LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t01.dart
index db37c42..3dd0137 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t05.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t01.dart
@@ -19,11 +19,37 @@
 
 import "override_checking_legacy_lib.dart";
 
-class A1 extends A {
-  void test_never(Never i) {}
-//    ^^^^^^^^^^
+class A extends LEGACY_ARGS {
+  void test_int(Never i) {}
+//     ^^^^^^^^
 // [analyzer] unspecified
 // [cfe] unspecified
+
+  void test_object(Never o) {}
+//     ^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_dynamic(Never i) {}
+//     ^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_function(Never f) {}
+//     ^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_null(Never n) {}
+//     ^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_futureOr(Never i) {}
+//     ^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
 }
 
 main() {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t22.dart b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t02.dart
similarity index 61%
rename from LanguageFeatures/nnbd/override_checking_A02_t22.dart
rename to LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t02.dart
index c638a8b..11c9ad6 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t22.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t02.dart
@@ -19,23 +19,37 @@
 
 import "override_checking_legacy_lib.dart";
 
-class A1 implements A {
-  void test_never(Never i) {}
-//     ^^^^^^^^^^
+class A implements LEGACY_ARGS {
+  void test_int(Never i) {}
+//     ^^^^^^^^
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  int? test_return_nullable() => 1;
-  Null test_return_never() => null;
-  int? aField1 = 1;
-  int? aField2 = 2;
-  int? aField3 = 3;
-  int? get get_field1 => -1;
-  int? get get_field2 => -2;
-  int? get get_field3 => -3;
-  void set set_field1(int? i) {}
-  void set set_field2(int? i) {}
-  void set set_field3(int? i) {}
+  void test_object(Never o) {}
+//     ^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_dynamic(Never i) {}
+//     ^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_function(Never f) {}
+//     ^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_null(Never n) {}
+//     ^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_futureOr(Never i) {}
+//     ^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
 }
 
 main() {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t39.dart b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t03.dart
similarity index 61%
rename from LanguageFeatures/nnbd/override_checking_A02_t39.dart
rename to LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t03.dart
index c2caa5b..9dc0f3b 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t39.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t03.dart
@@ -19,9 +19,34 @@
 
 import "override_checking_legacy_lib.dart";
 
-class A1 with A {
-  void test_never(Never i) {}
-//     ^^^^^^^^^^
+class A with LEGACY_ARGS {
+  void test_int(Never i) {}
+//     ^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_object(Never o) {}
+//     ^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_dynamic(Never i) {}
+//     ^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_function(Never f) {}
+//     ^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_null(Never n) {}
+//     ^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_futureOr(Never i) {}
+//     ^^^^^^^^^^^^^
 // [analyzer] unspecified
 // [cfe] unspecified
 
diff --git a/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t04.dart b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t04.dart
new file mode 100644
index 0000000..f9a5c4b
--- /dev/null
+++ b/LanguageFeatures/nnbd/override_checking_A02_NEVER_ARGS_t04.dart
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2019, 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.
+ */
+/**
+ * @assertion In a migrated library, override checking must check that an
+ * override is consistent with all overridden methods from other migrated
+ * libraries in the super-interface chain, since a legacy library is permitted
+ * to override otherwise incompatible signatures for a method.
+ *
+ * @description Check that if opted-in class implements two classes with some
+ * method (one is legacy), compile time error is thrown if parent legacy method
+ * parameter is of any legacy type and child opted-in method parameter is
+ * [Never].
+ *
+ * @author iarkh@unipro.ru
+ */
+// SharedOptions=--enable-experiment=non-nullable
+
+import "override_checking_legacy_lib.dart";
+
+class B {
+  void test_int     (Never i) {}
+  void test_object  (Never o) {}
+  void test_dynamic (Never i) {}
+  void test_function(Never f) {}
+  void test_null    (Never n) {}
+  void test_futureOr(Never i) {}
+}
+
+class A implements LEGACY_ARGS, B {
+  void test_int(Never i) {}
+//     ^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_object(Never o) {}
+//     ^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_dynamic(Never i) {}
+//     ^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_function(Never f) {}
+//     ^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_null(Never n) {}
+//     ^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+  void test_futureOr(Never i) {}
+//     ^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
+
+main() {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t23.dart b/LanguageFeatures/nnbd/override_checking_A02_t23.dart
index 1afc507..530dfa2 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t23.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t23.dart
@@ -22,7 +22,6 @@
 class A1 implements A {
   int? aField1 = 0;
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -38,7 +37,6 @@
 class A2 implements A {
   int? aField1 = null;
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -54,7 +52,6 @@
 class A3 implements A {
   int? aField1;
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t24.dart b/LanguageFeatures/nnbd/override_checking_A02_t24.dart
index a8e3a03..aa6bb69 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t24.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t24.dart
@@ -25,7 +25,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -44,7 +43,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -63,7 +61,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t25.dart b/LanguageFeatures/nnbd/override_checking_A02_t25.dart
index 1eb922a..12b2d10 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t25.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t25.dart
@@ -27,7 +27,6 @@
   int? get get_field2 => null;
   int? get get_field3 => aField3;
 
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
   void set set_field1(int i) {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t26.dart b/LanguageFeatures/nnbd/override_checking_A02_t26.dart
index eb0c2f1..cf8b13d 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t26.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t26.dart
@@ -27,7 +27,6 @@
   int? aField1 = 1;
   int? aField2 = null;
   int? aField3;
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
   void set set_field1(int i) {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t27.dart b/LanguageFeatures/nnbd/override_checking_A02_t27.dart
index 40c2ac6..d25151f 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t27.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t27.dart
@@ -31,7 +31,6 @@
   void set set_field2(int? i) { aField2 = i; }
   void set set_field3(int? i) { aField3 = i; }
 
-  int test_never(Null i) => 1;
   int test_return_nullable() => 1;
   Null test_return_never() => null;
 }
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t28.dart b/LanguageFeatures/nnbd/override_checking_A02_t28.dart
index c282652..9c552a7 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t28.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t28.dart
@@ -41,7 +41,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
 }
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t29.dart b/LanguageFeatures/nnbd/override_checking_A02_t29.dart
index d79c36f..d092f51 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t29.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t29.dart
@@ -22,7 +22,6 @@
 class A1 implements A {
   int? test_return_nullable() => 2;
 
-  void test_never(Null i) {}
   Null test_return_never() => null;
   int? aField1 = 1;
   int? aField2 = 2;
@@ -38,7 +37,6 @@
 class A2 implements A {
   int? test_return_nullable() => null;
 
-  void test_never(Null i) {}
   Null test_return_never() => null;
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t30.dart b/LanguageFeatures/nnbd/override_checking_A02_t30.dart
index 1e3dc7d..c0718a0 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t30.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t30.dart
@@ -22,7 +22,6 @@
 class A1 implements A {
   int test_return_nullable() => 2;
 
-  void test_never(Null i) {}
   Null test_return_never() => null;
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t33.dart b/LanguageFeatures/nnbd/override_checking_A02_t33.dart
index 51ad3f0..7253820 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t33.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t33.dart
@@ -21,7 +21,6 @@
 class A1 implements A {
   Never test_return_never() => throw "It's impossible!";
 
-  void test_never(Null i) {}
   int? test_return_nullable() { return 1; }
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t34.dart b/LanguageFeatures/nnbd/override_checking_A02_t34.dart
index aab861e..83c74cf 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t34.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t34.dart
@@ -22,7 +22,6 @@
 class A1 implements A {
   Never test_return_never() => throw "It's impossible!";
 
-  void test_never(Null i) {}
   int? test_return_nullable() { return 1; }
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t56.dart b/LanguageFeatures/nnbd/override_checking_A02_t56.dart
deleted file mode 100644
index fcd8484..0000000
--- a/LanguageFeatures/nnbd/override_checking_A02_t56.dart
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (c) 2019, 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.
- */
-/**
- * @assertion In a migrated library, override checking must check that an
- * override is consistent with all overridden methods from other migrated
- * libraries in the super-interface chain, since a legacy library is permitted
- * to override otherwise incompatible signatures for a method.
- *
- * @description Check that if opted-in class implements two classes with some
- * method (one is legacy), compile time error is thrown if parent legacy method
- * parameter is of any legacy type and child opted-in method parameter is
- * [Never].
- *
- * @author iarkh@unipro.ru
- */
-// SharedOptions=--enable-experiment=non-nullable
-
-import "override_checking_legacy_lib.dart";
-
-abstract class B1 {
-  void test_never(Never i);
-}
-
-class A1 implements A {
-  void test_never(Never i) {}
-//     ^^^^^^^^^^
-// [analyzer] unspecified
-// [cfe] unspecified
-
-  int? test_return_nullable() => 1;
-  Null test_return_never() => null;
-  int? aField1 = 1;
-  int? aField2 = 2;
-  int? aField3 = 3;
-  int? get get_field1 => -1;
-  int? get get_field2 => -2;
-  int? get get_field3 => -3;
-  void set set_field1(int? i) {}
-  void set set_field2(int? i) {}
-  void set set_field3(int? i) {}
-}
-
-main() {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t57.dart b/LanguageFeatures/nnbd/override_checking_A02_t57.dart
index 23fe2bf..c5d1d34 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t57.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t57.dart
@@ -27,7 +27,6 @@
 class A1 implements A, B {
   int? aField1 = 0;
 
-  void test_never(Null i) => 1;
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -43,7 +42,6 @@
 class A2 implements A, B {
   int? aField1 = null;
 
-  void test_never(Null i) => 1;
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -59,7 +57,6 @@
 class A3 implements A, B {
   int? aField1;
 
-  void test_never(Null i) => 1;
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t58.dart b/LanguageFeatures/nnbd/override_checking_A02_t58.dart
index 50297f7..39484ad 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t58.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t58.dart
@@ -33,7 +33,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) => 1;
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -52,7 +51,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) => 1;
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
@@ -71,7 +69,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) => 1;
   int? test_return_nullable() => 1;
   Null test_return_never() => null;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t59.dart b/LanguageFeatures/nnbd/override_checking_A02_t59.dart
index 84541f4..720f24b 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t59.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t59.dart
@@ -34,7 +34,6 @@
   int? get get_field2 => aField2;
   int? get get_field3 => aField3;
 
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
   void set set_field1(int i) {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t60.dart b/LanguageFeatures/nnbd/override_checking_A02_t60.dart
index ccd3de5..1103491 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t60.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t60.dart
@@ -34,7 +34,6 @@
   int? aField1 = 1;
   int? aField2 = null;
   int? aField3;
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
   void set set_field1(int i) {}
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t61.dart b/LanguageFeatures/nnbd/override_checking_A02_t61.dart
index 22897a7..0d0e284 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t61.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t61.dart
@@ -41,7 +41,6 @@
   int? get get_field1 => aField1;
   int? get get_field2 => aField2;
   int? get get_field3 => aField3;
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
 }
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t62.dart b/LanguageFeatures/nnbd/override_checking_A02_t62.dart
index c94a96c..7831019 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t62.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t62.dart
@@ -54,7 +54,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
 }
@@ -82,7 +81,6 @@
 // [analyzer] unspecified
 // [cfe] unspecified
 
-  void test_never(Null i) {}
   int test_return_nullable() => 1;
   Null test_return_never() => null;
 }
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t63.dart b/LanguageFeatures/nnbd/override_checking_A02_t63.dart
index 73d36e5..7f7db63 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t63.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t63.dart
@@ -30,7 +30,6 @@
 class A1 implements A, B1 {
   int? test_return_nullable() => null;
 
-  void test_never(Null i) {}
   Null test_return_never() => null;
   int? aField1 = 1;
   int? aField2 = 2;
@@ -46,7 +45,6 @@
 class A2 implements A, B2 {
   int test_return_nullable() => 2;
 
-  void test_never(Null i) {}
   Null test_return_never() => null;
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t64.dart b/LanguageFeatures/nnbd/override_checking_A02_t64.dart
index 3978c29..3f6478d 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t64.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t64.dart
@@ -30,7 +30,6 @@
 class A1 implements A, B1 {
   int test_return_nullable() => 1;
 
-  void test_never(Null i) {}
   Null test_return_never() => null;
   int? aField1 = 1;
   int? aField2 = 2;
@@ -46,7 +45,6 @@
 class A2 implements A, B2 {
   int test_return_nullable() => 2;
 
-  void test_never(Null i) {}
   Null test_return_never() => null;
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t67.dart b/LanguageFeatures/nnbd/override_checking_A02_t67.dart
index 1e266b3..472f37d 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t67.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t67.dart
@@ -25,7 +25,6 @@
 class A1 implements A {
   Never test_return_never() => throw "It's impossible!";
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_A02_t68.dart b/LanguageFeatures/nnbd/override_checking_A02_t68.dart
index 61434bd..d76a92d 100644
--- a/LanguageFeatures/nnbd/override_checking_A02_t68.dart
+++ b/LanguageFeatures/nnbd/override_checking_A02_t68.dart
@@ -24,7 +24,6 @@
 class A1 implements A {
   Never test_return_never() => throw "It's impossible!";
 
-  void test_never(Null i) {}
   int? test_return_nullable() => 1;
   int? aField1 = 1;
   int? aField2 = 2;
diff --git a/LanguageFeatures/nnbd/override_checking_legacy_lib.dart b/LanguageFeatures/nnbd/override_checking_legacy_lib.dart
index bfce35a..6936de1 100644
--- a/LanguageFeatures/nnbd/override_checking_legacy_lib.dart
+++ b/LanguageFeatures/nnbd/override_checking_legacy_lib.dart
@@ -15,24 +15,20 @@
 import "../../Utils/expect.dart";
 
 class LEGACY_ARGS {
-  void test_int(int i) { Expect.fail("This method should be overriden"); }
-  void test_object(Object o) { Expect.fail("This method should be overriden"); }
-  void test_dynamic(dynamic i) { Expect.fail("This method should be overriden"); }
+  void test_int(int i)           { Expect.fail("This method should be overriden"); }
+  void test_object(Object o)     { Expect.fail("This method should be overriden"); }
+  void test_dynamic(dynamic i)   { Expect.fail("This method should be overriden"); }
   void test_function(Function f) { Expect.fail("This method should be overriden"); }
-  void test_null(Null n) { Expect.fail("This method should be overriden"); }
+  void test_null(Null n)         { Expect.fail("This method should be overriden"); }
   void test_futureOr(FutureOr i) { Expect.fail("This method should be overriden"); }
 }
 
 class LEGACY_REQUIRED_ARGS {
   void test_default({int i = 1}) { Expect.fail("This method should be overriden"); }
-  void test_nondefault({int i}) { Expect.fail("This method should be overriden"); }
+  void test_nondefault({int i})  { Expect.fail("This method should be overriden"); }
 }
 
 class A {
-  void test_never(Null i) {
-    Expect.fail("This method should be overriden");
-  }
-
   int test_return_nullable() {
     Expect.fail("This method should be overriden");
     return -1;