diff --git a/front_end/core/host/InspectorFrontendHost.ts b/front_end/core/host/InspectorFrontendHost.ts
index f477627aba8..afe7b7cda0c 100644
--- a/front_end/core/host/InspectorFrontendHost.ts
+++ b/front_end/core/host/InspectorFrontendHost.ts
@@ -408,6 +408,7 @@ export class InspectorFrontendHostStub implements InspectorFrontendHostAPI {
   }
 
   reattach(callback: () => void): void {
+    callback();
   }
 
   readyForTest(): void {