1 files changed, 1 insertions, 1 deletions
diff --git a/devtools/client/jsonview/test/browser_jsonview_serviceworker.js b/devtools/client/jsonview/test/browser_jsonview_serviceworker.js
index 3d68cad065..c8be1a939a 100644
--- a/devtools/client/jsonview/test/browser_jsonview_serviceworker.js
+++ b/devtools/client/jsonview/test/browser_jsonview_serviceworker.js
@@ -34,7 +34,7 @@ add_task(async function () {
           resolve();
           return;
         }
-        worker.addEventListener("statechange", evt => {
+        worker.addEventListener("statechange", () => {
           if (worker.state === "activated") {
             resolve();
           }