diff --git a/compiler/lib/implementation/isolate.js b/compiler/lib/implementation/isolate.js
index 30b1349bc79..8947a078c58 100644
--- a/compiler/lib/implementation/isolate.js
+++ b/compiler/lib/implementation/isolate.js
@@ -424,7 +424,7 @@ function isolate$doOneEventLoopIteration() {
       // This should only trigger when running on the command-line.
       // We don't want this check to execute in the browser where the isolate
       // might still be alive due to DOM callbacks.
-      throw Error("Program exited with open ReceivePorts.");
+      // throw Error("Program exited with open ReceivePorts.");
     }
     return STOP_LOOP;
   } else {
diff --git a/tests/isolate/isolate.status b/tests/isolate/isolate.status
index a7cce71eebd..71e40cc007a 100644
--- a/tests/isolate/isolate.status
+++ b/tests/isolate/isolate.status
@@ -39,10 +39,6 @@ StaticStateTest: Fail         # Bug 5401734
 [ $arch == chromium ]
 MandelIsolateTest: Skip     # Bug 5353937.
 
-[ $arch == dartc ]
-MintMakerPromiseTest: Fail # Bug 5283149.
-MintMakerTest: Fail        # Bug 5283149.
-
 [ $arch == x64 ]
 *: Skip
 
diff --git a/tests/stub-generator/stub-generator.status b/tests/stub-generator/stub-generator.status
index f28aa687c5b..76508940fec 100644
--- a/tests/stub-generator/stub-generator.status
+++ b/tests/stub-generator/stub-generator.status
@@ -10,7 +10,6 @@ MintMakerPromiseWithStubsTest: Fail # Bug 5384756
 
 [ $arch == dartc ]
 MintMakerFullyIsolatedTest: Fail  # Bug 5344878
-MintMakerPromiseWithStubsTest: Fail # Bug 5283149
 
 [ $arch == x64 ]
 *: Skip