diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-call-stack.js b/devtools/client/debugger/test/mochitest/browser_dbg-call-stack.js
index d461918d7acd3672a5ece69cee8f0257937ba972..4d8720d39597c4e7edeab2eff2cbc99cdec76f8b 100644
--- a/devtools/client/debugger/test/mochitest/browser_dbg-call-stack.js
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-call-stack.js
@@ -19,6 +19,8 @@ add_task(async function () {
 
   const button = toggleButton(dbg);
   ok(!button, "toggle button shouldn't be there");
+
+  await resume(dbg);
 });
 
 add_task(async function () {