Upgrade to the new test runner. R=sigmund@google.com Review URL: https://codereview.chromium.org//1240033002 .

diff --git a/pkgs/source_span/.gitignore b/pkgs/source_span/.gitignore
index 388eff0..7dbf035 100644
--- a/pkgs/source_span/.gitignore
+++ b/pkgs/source_span/.gitignore

@@ -3,6 +3,7 @@
 .pub/
 build/
 packages
+.packages
 
 # Or the files created by dart2js.
 *.dart.js

diff --git a/pkgs/source_span/.status b/pkgs/source_span/.status
deleted file mode 100644
index e9f2b00..0000000
--- a/pkgs/source_span/.status
+++ /dev/null

@@ -1,3 +0,0 @@
-# Copyright (c) 2014, 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.

diff --git a/pkgs/source_span/.test_config b/pkgs/source_span/.test_config
new file mode 100644
index 0000000..412fc5c
--- /dev/null
+++ b/pkgs/source_span/.test_config

@@ -0,0 +1,3 @@
+{
+  "test_package": true
+}
\ No newline at end of file

diff --git a/pkgs/source_span/pubspec.yaml b/pkgs/source_span/pubspec.yaml
index 16eee7c..8f69deb 100644
--- a/pkgs/source_span/pubspec.yaml
+++ b/pkgs/source_span/pubspec.yaml

@@ -1,5 +1,5 @@
 name: source_span
-version: 1.1.2
+version: 1.1.3-dev
 author: Dart Team <misc@dartlang.org>
 description: A library for identifying source spans and locations.
 homepage: http://github.com/dart-lang/source_span
@@ -8,4 +8,4 @@
 environment:
   sdk: '>=0.8.10+6 <2.0.0'
 dev_dependencies:
-  unittest: '>=0.9.0 <0.12.0'
+  test: '>=0.12.0 <0.13.0'

diff --git a/pkgs/source_span/test/file_message_test.dart b/pkgs/source_span/test/file_message_test.dart
index 18b34e7..5935c58 100644
--- a/pkgs/source_span/test/file_message_test.dart
+++ b/pkgs/source_span/test/file_message_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:source_span/source_span.dart';
 import 'package:source_span/src/colors.dart' as colors;
 

diff --git a/pkgs/source_span/test/file_test.dart b/pkgs/source_span/test/file_test.dart
index c27c1f6..54bc3d3 100644
--- a/pkgs/source_span/test/file_test.dart
+++ b/pkgs/source_span/test/file_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:source_span/source_span.dart';
 
 main() {

diff --git a/pkgs/source_span/test/location_test.dart b/pkgs/source_span/test/location_test.dart
index 1eedec4..dcd497a 100644
--- a/pkgs/source_span/test/location_test.dart
+++ b/pkgs/source_span/test/location_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:source_span/source_span.dart';
 
 main() {

diff --git a/pkgs/source_span/test/span_test.dart b/pkgs/source_span/test/span_test.dart
index 2657f5f..113848a 100644
--- a/pkgs/source_span/test/span_test.dart
+++ b/pkgs/source_span/test/span_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:source_span/source_span.dart';
 import 'package:source_span/src/colors.dart' as colors;
 

diff --git a/pkgs/source_span/test/utils_test.dart b/pkgs/source_span/test/utils_test.dart
index 74975c3..3b6238b 100644
--- a/pkgs/source_span/test/utils_test.dart
+++ b/pkgs/source_span/test/utils_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:source_span/src/utils.dart';
 
 main() {