--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -11105,23 +11105,19 @@ nsGlobalWindow::GetInterface(JSContext* 
 }
 
 already_AddRefed<CacheStorage>
 nsGlobalWindow::GetCaches(ErrorResult& aRv)
 {
   MOZ_ASSERT(IsInnerWindow());
 
   if (!mCacheStorage) {
-    bool forceTrustedOrigin = false;
-    if (IsOuterWindow()) {
-      forceTrustedOrigin = GetServiceWorkersTestingEnabled();
-    } else {
-      nsRefPtr<nsGlobalWindow> outer = GetOuterWindowInternal();
-      forceTrustedOrigin = outer->GetServiceWorkersTestingEnabled();
-    }
+    bool forceTrustedOrigin =
+      GetOuterWindowInternal()->GetServiceWorkersTestingEnabled();
+
     mCacheStorage = CacheStorage::CreateOnMainThread(cache::DEFAULT_NAMESPACE,
                                                      this, GetPrincipal(),
                                                      IsPrivateBrowsing(),
                                                      forceTrustedOrigin, aRv);
   }
 
   nsRefPtr<CacheStorage> ref = mCacheStorage;
   return ref.forget();