Fix for issue 28854.

tests/standalone/standalone.status

 # Copyright (c) 2013, 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.
 
 # WARNING:
 # Tests using the multitest feature where failure is expected should *also* be
 # listed in tests/lib/analyzer/analyze_tests.status without the "standalone"
 # prefix.
 
 io/raw_socket_test: Pass, RuntimeError # Issue 28288
@@ skipping 59 matching lines @@
 # These tests might be slow on an opt counter threshold bot.
 # They also time out on the bot occasionally => flaky test issue 28046
 io/http_basic_test: Pass, Slow, Timeout  # Issue 28046
 io/http_launch_test: Pass, Slow, Timeout  # Issue 28046
 
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
 typed_array_test: RuntimeError, OK  # Uses Isolate.spawn
 typed_array_int64_uint64_test: RuntimeError, OK  # Uses Isolate.spawn
 typed_data_isolate_test: SkipByDesign # This test uses dart:io
+regress_28854_1_test: SkipByDesign # Uses Isolate.spawn
+regress_28854_2_test: SkipByDesign # Uses Isolate.spawn
 io/*: SkipByDesign # Don't run tests using dart:io in the browser
 package/*: Skip # Do not run those in Dartium.
 http_launch_test: Skip
 vmservice/*: SkipByDesign # Do not run standalone vm service tests in browser.
 issue14236_test: Skip # Issue 14236 Script snapshots do not work in the browser.
 oom_error_stacktrace_test: Skip
 out_of_memory_test: Skip
 map_insert_remove_oom_test: Skip  # Issue 24571
 verbose_gc_to_bmu_test: Skip
 regress_26031_test: SkipByDesign # Standalone only test
@@ skipping 327 matching lines @@
 io/socket_source_address_test: SkipByDesign
 io/socket_bind_test: SkipByDesign
 io/http_proxy_advanced_test: SkipByDesign
 io/http_ipv6_test: SkipByDesign
 io/socket_ipv6_test: SkipByDesign
 io/socket_info_ipv6_test: SkipByDesign
 
 [ $builder_tag == asan && $arch == x64 ]
 io/process_detached_test: Pass, Slow
 io/named_pipe_script_test: RuntimeError