diff --git a/tests/dartdevc/hot_restart_expando_test.dart b/tests/dartdevc/hot_restart_expando_test.dart
new file mode 100644
index 00000000000..4802a52423f
--- /dev/null
+++ b/tests/dartdevc/hot_restart_expando_test.dart
@@ -0,0 +1,30 @@
+// Copyright (c) 2019, 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.
+
+import 'dart:_runtime' as dart;
+
+import 'package:expect/expect.dart';
+import 'package:js/js.dart';
+
+final e = Expando<int>();
+
+@JS()
+external void eval(String s);
+
+@JS()
+external Object get singleton;
+
+void main() {
+  eval('''
+    if (!self.singleton) {
+      self.singleton = {};
+    }
+  ''');
+  var o = singleton;
+  Expect.equals(null, e[o]);
+  e[o] = 1;
+
+  dart.hotRestart();
+  Expect.equals(null, e[o]);
+}
diff --git a/tests/dartdevc_2/hot_restart_expando_test.dart b/tests/dartdevc_2/hot_restart_expando_test.dart
new file mode 100644
index 00000000000..4802a52423f
--- /dev/null
+++ b/tests/dartdevc_2/hot_restart_expando_test.dart
@@ -0,0 +1,30 @@
+// Copyright (c) 2019, 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.
+
+import 'dart:_runtime' as dart;
+
+import 'package:expect/expect.dart';
+import 'package:js/js.dart';
+
+final e = Expando<int>();
+
+@JS()
+external void eval(String s);
+
+@JS()
+external Object get singleton;
+
+void main() {
+  eval('''
+    if (!self.singleton) {
+      self.singleton = {};
+    }
+  ''');
+  var o = singleton;
+  Expect.equals(null, e[o]);
+  e[o] = 1;
+
+  dart.hotRestart();
+  Expect.equals(null, e[o]);
+}