Look for dart-sdk in two places.

pkg/analyzer-experimental/test/generated/resolver_test.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.resolver_test;
 
 import 'dart:collection';
 import 'package:analyzer-experimental/src/generated/java_core.dart';
 import 'package:analyzer-experimental/src/generated/java_engine.dart';
 import 'package:analyzer-experimental/src/generated/java_junit.dart';
 import 'package:analyzer-experimental/src/generated/source_io.dart';
@@ skipping 5095 matching lines @@
         runJUnitTest(__test, __test.test_typeArgumentNotMatchingBounds_const);
       });
       _ut.test('test_typeArgumentNotMatchingBounds_new', () {
         final __test = new SimpleResolverTest();
         runJUnitTest(__test, __test.test_typeArgumentNotMatchingBounds_new);
       });
     });
   }
 }
 main() {
-  /*ElementResolverTest.dartSuite();
+  ElementResolverTest.dartSuite();
   LibraryElementBuilderTest.dartSuite();
   LibraryTest.dartSuite();
   StaticTypeAnalyzerTest.dartSuite();
   TypeProviderImplTest.dartSuite();
   TypeResolverVisitorTest.dartSuite();
   EnclosedScopeTest.dartSuite();
   LibraryImportScopeTest.dartSuite();
   LibraryScopeTest.dartSuite();
   ScopeTest.dartSuite();
   CompileTimeErrorCodeTest.dartSuite();
   ErrorResolverTest.dartSuite();
   SimpleResolverTest.dartSuite();
   StaticTypeWarningCodeTest.dartSuite();
-  StaticWarningCodeTest.dartSuite();*/
+  StaticWarningCodeTest.dartSuite();
 }