diff --git a/dom/workers/remoteworkers/RemoteWorkerChild.cpp b/dom/workers/remoteworkers/RemoteWorkerChild.cpp
index d96361a59fc2..dad513c2c923 100644
--- a/dom/workers/remoteworkers/RemoteWorkerChild.cpp
+++ b/dom/workers/remoteworkers/RemoteWorkerChild.cpp
@@ -144,33 +144,11 @@ class MessagePortIdentifierRunnable final : public WorkerRunnable {
         mPortIdentifier(aPortIdentifier) {}
 
  private:
-  virtual bool WorkerRun(JSContext* aCx,
-                         WorkerPrivate* aWorkerPrivate) override {
+  bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
     mActor->AddPortIdentifier(aCx, aWorkerPrivate, mPortIdentifier);
     return true;
   }
 
-  virtual bool PreDispatch(WorkerPrivate* aWorkerPrivate) override {
-    // Silence bad assertions.
-    return true;
-  }
-
-  virtual void PostDispatch(WorkerPrivate* aWorkerPrivate,
-                            bool aDispatchResult) override {
-    // Silence bad assertions.
-  }
-
-  bool PreRun(WorkerPrivate* aWorkerPrivate) override {
-    // Silence bad assertions.
-    return true;
-  }
-
-  void PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
-               bool aRunResult) override {
-    // Silence bad assertions.
-    return;
-  }
-
   SelfHolder mActor;
   UniqueMessagePortId mPortIdentifier;
 };
diff --git a/dom/workers/test/mochitest.ini b/dom/workers/test/mochitest.ini
index 3cfdebb0bd6c..17e6601e9cce 100644
--- a/dom/workers/test/mochitest.ini
+++ b/dom/workers/test/mochitest.ini
@@ -108,7 +108,6 @@ support-files =
 [test_blobConstructor.html]
 [test_blobWorkers.html]
 [test_bug949946.html]
-skip-if = debug && ((android_version == '24') || (os == "linux" && bits == 64) || (os == "win" && bits == 32) || (os == "mac"))  #crashes Bug 1564700
 [test_bug978260.html]
 [test_bug998474.html]
 [test_bug1002702.html]