diff --git a/gfx/layers/apz/test/mochitest/helper_long_tap.html b/gfx/layers/apz/test/mochitest/helper_long_tap.html
index 883822d771f2..638b048e794c 100644
--- a/gfx/layers/apz/test/mochitest/helper_long_tap.html
+++ b/gfx/layers/apz/test/mochitest/helper_long_tap.html
@@ -10,12 +10,6 @@
   <script type="application/javascript">
 
 function longPressLink() {
-  if (!window.TouchEvent) {
-    ok(true, "Touch events are not supported on this platform, sorry!\n");
-    subtestDone();
-    return;
-  }
-
   synthesizeNativeTouch(document.getElementById('b'), 5, 5, SpecialPowers.DOMWindowUtils.TOUCH_CONTACT, function() {
     dump("Finished synthesizing touch-start, waiting for events...\n");
   });
diff --git a/gfx/layers/apz/test/mochitest/helper_scrollto_tap.html b/gfx/layers/apz/test/mochitest/helper_scrollto_tap.html
index 546c764bbddf..fc444f2b77d2 100644
--- a/gfx/layers/apz/test/mochitest/helper_scrollto_tap.html
+++ b/gfx/layers/apz/test/mochitest/helper_scrollto_tap.html
@@ -38,12 +38,6 @@ function startTest() {
 }
 
 function clickButton() {
-  if (!window.TouchEvent) {
-    ok(true, "Touch events are not supported on this platform, sorry!\n");
-    subtestDone();
-    return;
-  }
-
   document.addEventListener('click', clicked, false);
 
   synthesizeNativeTap(document.getElementById('b'), 5, 5, function() {
diff --git a/gfx/layers/apz/test/mochitest/helper_tap.html b/gfx/layers/apz/test/mochitest/helper_tap.html
index 7291af27cca4..6fde9387d809 100644
--- a/gfx/layers/apz/test/mochitest/helper_tap.html
+++ b/gfx/layers/apz/test/mochitest/helper_tap.html
@@ -10,12 +10,6 @@
   <script type="application/javascript">
 
 function clickButton() {
-  if (!window.TouchEvent) {
-    ok(true, "Touch events are not supported on this platform, sorry!\n");
-    subtestDone();
-    return;
-  }
-
   document.addEventListener('click', clicked, false);
 
   synthesizeNativeTap(document.getElementById('b'), 5, 5, function() {
diff --git a/gfx/layers/apz/test/mochitest/helper_tap_passive.html b/gfx/layers/apz/test/mochitest/helper_tap_passive.html
index ac68a3950bb3..ee99c37f6771 100644
--- a/gfx/layers/apz/test/mochitest/helper_tap_passive.html
+++ b/gfx/layers/apz/test/mochitest/helper_tap_passive.html
@@ -12,12 +12,6 @@
 var touchdownTime;
 
 function longPressLink() {
-  if (!window.TouchEvent) {
-    ok(true, "Touch events are not supported on this platform, sorry!\n");
-    subtestDone();
-    return;
-  }
-
   synthesizeNativeTouch(document.getElementById('b'), 5, 5, SpecialPowers.DOMWindowUtils.TOUCH_CONTACT, function() {
     dump("Finished synthesizing touch-start, waiting for events...\n");
   });
diff --git a/gfx/layers/apz/test/mochitest/mochitest.ini b/gfx/layers/apz/test/mochitest/mochitest.ini
index 3c46fc675912..3da5f393e6ce 100644
--- a/gfx/layers/apz/test/mochitest/mochitest.ini
+++ b/gfx/layers/apz/test/mochitest/mochitest.ini
@@ -48,8 +48,7 @@ skip-if = (os == 'android') || (os == 'b2g') || (buildapp == 'mulet') # wheel ev
 [test_frame_reconstruction.html]
 [test_group_touchevents.html]
 # Windows touch injection doesn't work in automation, but this test can be run locally on a windows touch device.
-# On OS X we don't support touch events at all.
-skip-if = (toolkit == 'windows') || (toolkit == 'cocoa')
+skip-if = (toolkit == 'windows')
 [test_group_wheelevents.html]
 skip-if = (toolkit == 'android') # wheel events not supported on mobile
 [test_group_mouseevents.html]
diff --git a/gfx/layers/apz/test/mochitest/test_group_touchevents.html b/gfx/layers/apz/test/mochitest/test_group_touchevents.html
index cdc1ee151d81..da433418c6f1 100644
--- a/gfx/layers/apz/test/mochitest/test_group_touchevents.html
+++ b/gfx/layers/apz/test/mochitest/test_group_touchevents.html
@@ -70,6 +70,7 @@ var subtests = [
 ];
 
 if (isApzEnabled()) {
+  ok(window.TouchEvent, "Check if TouchEvent is supported (it should be, the test harness forces it on everywhere)");
   if (getPlatform() == "android") {
     // This has a lot of subtests, and Android emulators are slow.
     SimpleTest.requestLongerTimeout(2);