diff --git a/browser/components/migration/tests/unit/test_automigration.js b/browser/components/migration/tests/unit/test_automigration.js
index 34e90d00d900..40ec676a1724 100644
--- a/browser/components/migration/tests/unit/test_automigration.js
+++ b/browser/components/migration/tests/unit/test_automigration.js
@@ -215,7 +215,7 @@ add_task(function* checkUndoRemoval() {
   let frecencyUpdatePromise = new Promise(resolve => {
     let expectedChanges = 2;
     let observer = {
-      onFrecencyChanged: function() {
+      onFrecencyChanged: function(aURI) {
         if (!--expectedChanges) {
           PlacesUtils.history.removeObserver(observer);
           resolve();
diff --git a/toolkit/components/places/tests/history/test_removeVisitsByFilter.js b/toolkit/components/places/tests/history/test_removeVisitsByFilter.js
index 699420e432a4..ea05cf951e87 100644
--- a/toolkit/components/places/tests/history/test_removeVisitsByFilter.js
+++ b/toolkit/components/places/tests/history/test_removeVisitsByFilter.js
@@ -154,7 +154,7 @@ add_task(function* test_removeVisitsByFilter() {
       },
       onManyFrecenciesChanged: function() {
         do_print("Many frecencies changed");
-        for (let [, deferred] of frecencyChangePromises) {
+        for (let [,deferred] of frecencyChangePromises) {
           deferred.resolve();
         }
       },