Make integration tests a bit cleaner.

utils/tests/pub/update/git/update_to_nonexistent_pubspec_test.dart

Index: utils/tests/pub/update/git/update_to_nonexistent_pubspec_test.dart
diff --git a/utils/tests/pub/update/git/update_to_nonexistent_pubspec_test.dart b/utils/tests/pub/update/git/update_to_nonexistent_pubspec_test.dart
index b77710378bb941968ad9245287e5a58cb61067f6..21951ab85efd0a3b04d3200912e8cdddbf42e777 100644
--- a/utils/tests/pub/update/git/update_to_nonexistent_pubspec_test.dart
+++ b/utils/tests/pub/update/git/update_to_nonexistent_pubspec_test.dart
@@ -7,10 +7,9 @@ library pub_tests;
 import 'dart:io';
 
 import '../../test_pub.dart';
-import '../../../../../pkg/unittest/lib/unittest.dart';
 
 main() {
-  test("updates Git packages to a nonexistent pubspec", () {
+  integration("updates Git packages to a nonexistent pubspec", () {
     ensureGit();
 
     var repo = git('foo.git', [
@@ -43,7 +42,5 @@ main() {
         file('foo.dart', 'main() => "foo";')
       ])
     ]).scheduleValidate();
-
-    run();
   });
 }