1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/urlbar/tests/unit/test_heuristic_cancel.js b/browser/components/urlbar/tests/unit/test_heuristic_cancel.js
index 6f6f2fbd8a..a78004f2bd 100644
--- a/browser/components/urlbar/tests/unit/test_heuristic_cancel.js
+++ b/browser/components/urlbar/tests/unit/test_heuristic_cancel.js
@@ -126,7 +126,7 @@ add_task(async function timerIsCancelled() {
   // Then they will be queued up in a _heuristicProvidersTimer, waiting for
   // the results from SlowProvider.
   let resultsAddedPromise = new Promise(resolve => {
-    let observe = async (subject, topic, data) => {
+    let observe = async () => {
       Services.obs.removeObserver(observe, "results-added");
       // Fire the second query to cancel the first.
       await controller.startQuery(secondContext);