Start cleaning up the HTML tests.

pkg/dev_compiler/test/codegen/lib/html/element_add_test.dart

Index: pkg/dev_compiler/test/codegen/lib/html/element_add_test.dart
diff --git a/pkg/dev_compiler/test/codegen/lib/html/element_add_test.dart b/pkg/dev_compiler/test/codegen/lib/html/element_add_test.dart
index 2c2ea01890149b3d52fb73f1b08d71c81d1ab585..5f35835dc8bb6736c2f8da19681d597b63f8ce48 100644
--- a/pkg/dev_compiler/test/codegen/lib/html/element_add_test.dart
+++ b/pkg/dev_compiler/test/codegen/lib/html/element_add_test.dart
@@ -2,15 +2,13 @@
 // 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
 
-library ElementAddTest;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
-import 'util.dart';
 import 'dart:html';
 
-main() {
-  useHtmlConfiguration();
+import 'package:minitest/minitest.dart';
 
+import 'util.dart';
+
+main() {
   var isSpanElement = predicate((x) => x is SpanElement, 'is a SpanElemt');
   var isDivElement = predicate((x) => x is DivElement, 'is a DivElement');
   var isText = predicate((x) => x is Text, 'is a Text');