4 files changed, 7 insertions, 7 deletions
diff --git a/dom/tests/unit/test_Fetch.js b/dom/tests/unit/test_Fetch.js
index 768cf671dd..1449a23854 100644
--- a/dom/tests/unit/test_Fetch.js
+++ b/dom/tests/unit/test_Fetch.js
@@ -216,7 +216,7 @@ add_test(function test_getTestFailedConnect() {
   do_test_pending();
   // try a server that's not there
   fetch("http://localhost:4/should/fail")
-    .then(response => {
+    .then(() => {
       do_throw("Request should not succeed");
     })
     .catch(err => {
@@ -230,7 +230,7 @@ add_test(function test_mozError() {
   do_test_pending();
   // try a server that's not there
   fetch("http://localhost:4/should/fail", { mozErrors: true })
-    .then(response => {
+    .then(() => {
       do_throw("Request should not succeed");
     })
     .catch(err => {
@@ -245,7 +245,7 @@ add_test(function test_request_mozError() {
   // try a server that's not there
   const r = new Request("http://localhost:4/should/fail", { mozErrors: true });
   fetch(r)
-    .then(response => {
+    .then(() => {
       do_throw("Request should not succeed");
     })
     .catch(err => {
diff --git a/dom/tests/unit/test_PromiseDebugging.js b/dom/tests/unit/test_PromiseDebugging.js
index 2262d60d61..6148b65c75 100644
--- a/dom/tests/unit/test_PromiseDebugging.js
+++ b/dom/tests/unit/test_PromiseDebugging.js
@@ -2,7 +2,7 @@ function run_test() {
   // Hack around Promise.jsm being stuck on my global
   Assert.equal(false, PromiseDebugging === undefined);
   var res;
-  var p = new Promise(function (resolve, reject) {
+  var p = new Promise(function (resolve) {
     res = resolve;
   });
   var state = PromiseDebugging.getState(p);
diff --git a/dom/tests/unit/test_geolocation_monitor.js b/dom/tests/unit/test_geolocation_monitor.js
index f0fc1ad74b..7b47463882 100644
--- a/dom/tests/unit/test_geolocation_monitor.js
+++ b/dom/tests/unit/test_geolocation_monitor.js
@@ -56,7 +56,7 @@ function watchPosition() {
 let observer = {
   QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
 
-  observe(subject, topic, data) {
+  observe(subject, topic) {
     Assert.equal(topic, "geolocation-position-events");
     observer._countEvents++;
     observer._lastData = toJSON(subject);
diff --git a/dom/tests/unit/test_geolocation_provider.js b/dom/tests/unit/test_geolocation_provider.js
index 8c58cd39f5..e08887bfce 100644
--- a/dom/tests/unit/test_geolocation_provider.js
+++ b/dom/tests/unit/test_geolocation_provider.js
@@ -12,10 +12,10 @@ function terminate(succ) {
   geolocation.clearWatch(watchID);
 }
 
-function successCallback(pos) {
+function successCallback() {
   terminate(true);
 }
-function errorCallback(pos) {
+function errorCallback() {
   terminate(false);
 }