diff --git a/extensions/browser/src/browser/cdp.test.ts b/extensions/browser/src/browser/cdp.test.ts
index e6f33557b13..bc39b3e12b9 100644
--- a/extensions/browser/src/browser/cdp.test.ts
+++ b/extensions/browser/src/browser/cdp.test.ts
@@ -246,6 +246,18 @@ describe("cdp", () => {
         const msg = JSON.parse(rawDataToString(data)) as { id?: number; method?: string };
         if (msg.method === "Target.createTarget") {
           socket.send(JSON.stringify({ id: msg.id, result: { targetId: "T_QP" } }));
+        } else if (msg.method === "Target.attachToTarget") {
+          socket.send(JSON.stringify({ id: msg.id, result: { sessionId: "S1" } }));
+        } else if (
+          msg.method === "Target.detachFromTarget" ||
+          msg.method === "Page.enable" ||
+          msg.method === "Runtime.enable" ||
+          msg.method === "Network.enable" ||
+          msg.method === "DOM.enable" ||
+          msg.method === "Accessibility.enable" ||
+          msg.method === "Runtime.runIfWaitingForDebugger"
+        ) {
+          socket.send(JSON.stringify({ id: msg.id, result: {} }));
         }
       });
     });
@@ -461,20 +473,25 @@ describe("cdp", () => {
     });
     const wss = new WebSocketServer({ noServer: true });
     server.on("upgrade", (req, socket, head) => {
-      if (req.url?.startsWith("/e/bad")) {
-        socket.destroy();
-        return;
-      }
       wss.handleUpgrade(req, socket, head, (ws) => {
         wss.emit("connection", ws, req);
       });
     });
-    wss.on("connection", (socket) => {
+    wss.on("connection", (socket, req) => {
       socket.on("message", (data) => {
         const msg = JSON.parse(rawDataToString(data)) as {
           id?: number;
           method?: string;
         };
+        if (req.url?.startsWith("/e/bad")) {
+          socket.send(
+            JSON.stringify({
+              id: msg.id,
+              error: { message: "Browserless endpoint rejected command" },
+            }),
+          );
+          return;
+        }
         if (msg.method === "Target.createTarget") {
           socket.send(JSON.stringify({ id: msg.id, result: { targetId: "ROOT_FALLBACK" } }));
         } else if (msg.method === "Target.attachToTarget") {
diff --git a/extensions/browser/src/browser/chrome.internal.test.ts b/extensions/browser/src/browser/chrome.internal.test.ts
index da10c9b2304..4eaf8baf4d8 100644
--- a/extensions/browser/src/browser/chrome.internal.test.ts
+++ b/extensions/browser/src/browser/chrome.internal.test.ts
@@ -369,13 +369,14 @@ describe("chrome.ts internal", () => {
         cdpIsLoopback: true,
       }) as unknown as ResolvedBrowserProfile;
 
-    const makeResolved = (): ResolvedBrowserConfig =>
+    const makeResolved = (overrides: Partial<ResolvedBrowserConfig> = {}): ResolvedBrowserConfig =>
       ({
         headless: true,
         noSandbox: true,
         extraArgs: [],
         localLaunchTimeoutMs: 15_000,
         localCdpReadyTimeoutMs: 8_000,
+        ...overrides,
       }) as unknown as ResolvedBrowserConfig;
 
     it("rejects a remote profile before attempting to spawn", async () => {
@@ -528,7 +529,10 @@ describe("chrome.ts internal", () => {
       await fsp.symlink("remote-host-535", path.join(userDataDir, "SingletonLock"));
 
       try {
-        const running = await launchOpenClawChrome(makeResolved(), profile);
+        const running = await launchOpenClawChrome(
+          makeResolved({ localLaunchTimeoutMs: 20 }),
+          profile,
+        );
         expect(running.proc).toBe(secondProc);
         expect(firstProc.kill).toHaveBeenCalledWith("SIGKILL");
         expect(spawnCalls).toBe(2);