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diff --git a/dom/events/test/pointerevents/test_getCoalescedEvents_touch.html b/dom/events/test/pointerevents/test_getCoalescedEvents_touch.html
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+++ b/dom/events/test/pointerevents/test_getCoalescedEvents_touch.html
@@ -0,0 +1,111 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1511231
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1511231</title>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/gfx/layers/apz/test/mochitest/apz_test_native_event_utils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1303957">Mozilla Bug 1511231</a>
+<p id="display"></p>
+<div id="target0" style="margin: 50px; width: 50px; height: 50px; background: green"></div>
+<script type="text/javascript">
+/** Test for Bug 1511231 **/
+SimpleTest.waitForExplicitFinish();
+
+if (!window.opener) {
+  // the utils function in apz can't not be used in remote iframe, so run the
+  // test in a new tab.
+  info("run tests in a new tab");
+  window.open("test_getCoalescedEvents_touch.html");
+} else {
+  function runTests() {
+    let target0 = window.document.getElementById("target0");
+    let utils = SpecialPowers.getDOMWindowUtils(window);
+    utils.advanceTimeAndRefresh(0);
+
+    SimpleTest.executeSoon(async () => {
+      // Flush all pending touch events before synthesizing events.
+
+      let eventCount = 0;
+      target0.addEventListener("pointermove", function handler(ev) {
+        eventCount++;
+        if (eventCount == 1) {
+          // Ignore the first pointermove event since the first touch event won't
+          // be coalesced.
+          is(ev.getCoalescedEvents().length, 1,
+             "Coalesced events should be 1 for the first touchmove event");
+          return;
+        }
+
+        let length = ev.getCoalescedEvents().length;
+        ok(length >= 1, "Coalesced events should >= 1, got " + length);
+
+        let rect = target0.getBoundingClientRect();
+        let prevOffsetX = 0;
+        let prevOffsetY = 0;
+
+        for (let i = 0; i < length; ++i) {
+          let coalescedEvent = ev.getCoalescedEvents()[i];
+          opener.isnot(coalescedEvent.timeStamp, 0, "getCoalescedEvents()[" + i + "].timeStamp");
+          opener.is(coalescedEvent.type, "pointermove", "getCoalescedEvents()[" + i + "].type");
+          opener.is(coalescedEvent.pointerId, ev.pointerId, "getCoalescedEvents()[" + i + "].pointerId");
+          opener.is(coalescedEvent.pointerType, ev.pointerType, "getCoalescedEvents()[" + i + "].pointerType");
+          opener.is(coalescedEvent.isPrimary, ev.isPrimary, "getCoalescedEvents()[" + i + "].isPrimary");
+          opener.is(coalescedEvent.target, ev.target, "getCoalescedEvents()[" + i + "].target");
+          opener.is(coalescedEvent.currentTarget, null, "getCoalescedEvents()[" + i + "].currentTarget");
+          opener.is(coalescedEvent.eventPhase, Event.NONE, "getCoalescedEvents()[" + i + "].eventPhase");
+          opener.is(coalescedEvent.cancelable, false, "getCoalescedEvents()[" + i + "].cancelable");
+          opener.is(coalescedEvent.bubbles, false, "getCoalescedEvents()[" + i + "].bubbles");
+
+          opener.ok(coalescedEvent.offsetX >= prevOffsetX, "getCoalescedEvents()[" + i + "].offsetX = " + coalescedEvent.offsetX);
+          opener.ok(coalescedEvent.offsetX >= 10 && coalescedEvent.offsetX <= 40, "expected offsetX");
+
+          opener.ok(coalescedEvent.offsetY >= prevOffsetY, "getCoalescedEvents()[" + i + "].offsetY = " + coalescedEvent.offsetY);
+          opener.ok(coalescedEvent.offsetY >= 10 && coalescedEvent.offsetY <= 40, "expected offsetY");
+
+          prevOffsetX = coalescedEvent.offsetX;
+          prevOffsetY = coalescedEvent.offsetY;
+
+          let x = rect.left + prevOffsetX;
+          let y = rect.top + prevOffsetY;
+          // coordinates may change slightly due to rounding
+          opener.ok((coalescedEvent.clientX <= x+2) && (coalescedEvent.clientX >= x-2), "getCoalescedEvents()[" + i + "].clientX");
+          opener.ok((coalescedEvent.clientY <= y+2) && (coalescedEvent.clientY >= y-2), "getCoalescedEvents()[" + i + "].clientY");
+        }
+
+        target0.removeEventListener("pointermove", handler);
+      });
+
+      target0.addEventListener("pointerup", (ev) => {
+        utils.restoreNormalRefresh();
+        opener.SimpleTest.finish();
+        window.close();
+      }, { once: true });
+
+      let positions = [];
+      for (let i = 10; i <= 40; i+=5) {
+        positions.push([{ x: i, y: i }]);
+      }
+
+      await synthesizeNativeTouchSequences(target0, positions);
+    });
+  }
+
+  SimpleTest.waitForFocus(() => {
+    SpecialPowers.pushPrefEnv({"set": [
+      ["dom.events.coalesce.touchmove", true],
+      ["dom.events.compress.touchmove", false],
+    ]}, runTests);
+  });
+}
+
+</script>
+</body>
+</html>