Dynamic type error implies checked mode.

pkg/testing/lib/src/multitest.dart

 // Copyright (c) 2016, 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.md file.
 
 library testing.multitest;
 
 import 'dart:async' show
     Stream,
     StreamTransformer;
 
 import 'dart:io' show
     Directory,
     File;
 
 import 'log.dart' show
     splitLines;
 
 import 'test_description.dart' show
     TestDescription;
 
 bool isError(Set<String> expectations) {
   if (expectations.contains("compile-time error")) return true;
   if (expectations.contains("runtime error")) return true;
-  if (expectations.contains("dynamic type error")) return true;
   return false;
 }
 
 bool isCheckedModeError(Set<String> expectations) {
   if (expectations.contains("checked mode compile-time error")) return true;
+  if (expectations.contains("dynamic type error")) return true;
   return isError(expectations);
 }
 
 class MultitestTransformer
     implements StreamTransformer<TestDescription, TestDescription> {
   static const String multitestMarker = "///";
 
   static const List<String> validOutcomesList = const <String>[
       "ok",
       "compile-time error",
@@ skipping 88 matching lines @@
         subtest.multitestExpectations = outcomes[name];
         await subtest.file.writeAsString(lines.join(""));
         yield subtest;
       }
     }
     if (errors.isNotEmpty) {
       throw "Error: ${errors.join("\n")}";
     }
   }
 }