Third try: "Slow" does not imply "Pass".

pkg/pkg.status

 # Copyright (c) 2012, 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.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 171 matching lines @@
 # not minified.
 unittest/test/*_minified_test: Skip # DO NOT COPY THIS UNLESS YOU WORK ON DART2JS
 
 [ $arch == mips ]
 *: Skip  # Issue 13650
 
 [ $arch == arm ]
 *: Skip  # Issue 13624
 
 [ $arch == simarm || $arch == simmips ]
-third_party/html5lib/test/tokenizer_test: Slow
+third_party/html5lib/test/tokenizer_test: Pass, Slow
 
 # Skip serialization test that explicitly has no library declaration in the
 # test on Dartium, which requires all tests to have a library.
 [ $compiler == none && ( $runtime == dartium || $runtime == drt ) ]
 serialization/test/no_library_test: Skip # Expected Failure
 
 # Skip tests on the VM if the package depends on dart:html
 [ $runtime == vm ]
 custom_element: Skip
 mdv: Skip
@@ skipping 10 matching lines @@
 
 # Issue http://dartbug.com/12930
 [ $runtime == vm ]
 intl/test/message_extraction/message_extraction_test: Pass, Fail # Issue 12930
 
 [ $compiler == none && $runtime == vm ]
 observe/test/observe_test: Pass, Fail # Issue 13543
 
 [ $compiler == none && $runtime == vm && $checked ]
 intl/test/message_extraction/failed_extraction_test: Pass, Fail # Issue 13543