diff --git a/DEPS b/DEPS
index 21df3964015..97ae8953c5a 100644
--- a/DEPS
+++ b/DEPS
@@ -103,7 +103,7 @@ vars = {
   "mockito_tag": "d39ac507483b9891165e422ec98d9fb480037c8b",
   "mustache4dart_tag" : "v2.1.2",
   "oauth2_tag": "1.2.1",
-  "observatory_pub_packages_rev": "caf0aecfb15077fc7a34d48e9df13606c793fddf",
+  "observatory_pub_packages_rev": "129400266c6839365b9e93147f53fc0970e1d440",
   "package_config_tag": "1.0.3",
   "package_resolver_tag": "1.0.3",
   "path_tag": "1.5.1",
diff --git a/runtime/observatory/BUILD.gn b/runtime/observatory/BUILD.gn
index 4c1c2e0a33e..599a35f3eda 100644
--- a/runtime/observatory/BUILD.gn
+++ b/runtime/observatory/BUILD.gn
@@ -32,7 +32,6 @@ prebuilt_dart2js_action("build_observatory") {
                                ])  # Dependencies
 
   args = [
-    "--no-preview-dart-2",
     "-DOBS_VER=${version_string}",
     "-o",
     rebase_path(output),
diff --git a/runtime/observatory/tests/observatory_ui/observatory_ui.status b/runtime/observatory/tests/observatory_ui/observatory_ui.status
index eba0fcefd9c..30c3e415a45 100644
--- a/runtime/observatory/tests/observatory_ui/observatory_ui.status
+++ b/runtime/observatory/tests/observatory_ui/observatory_ui.status
@@ -2,11 +2,6 @@
 # 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.
 
-[ $strong ]
-allocation_profile/element_test: CompileTimeError # observatory is not strong clean (Issue 32503)
-isolate/counter_chart/element_test: CompileTimeError # observatory is not strong clean (Issue 32503)
-isolate/isolate-shared-summary/element_test: CompileTimeError # observatory is not strong clean (Issue 32503)
-
 [ $runtime == drt || !$browser || $fast_startup ]
 *: SkipByDesign