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diff --git a/gfx/layers/apz/test/mochitest/test_group_scroll_snap.html b/gfx/layers/apz/test/mochitest/test_group_scroll_snap.html
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index 0000000000..9a1341c503
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+++ b/gfx/layers/apz/test/mochitest/test_group_scroll_snap.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Various tests for scroll snap</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript" src="apz_test_utils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+const prefs = [
+  ["general.smoothScroll", false],
+  // ensure that any mouse movement will trigger a new wheel transaction,
+  // because in this test we move the mouse a bunch and want to recalculate
+  // the target APZC after each such movement.
+  ["mousewheel.transaction.ignoremovedelay", 0],
+  ["mousewheel.transaction.timeout", 0],
+];
+
+const subtests = [
+  {"file": "helper_scroll_snap_no_valid_snap_position.html", "prefs": prefs},
+  {"file": "helper_scroll_snap_resnap_after_async_scroll.html",
+    // Specify a small `layout.css.scroll-behavior.spring-constant` value to
+    // keep the smooth scroll animation running long enough so that we can
+    // trigger a reflow during the animation.
+   "prefs": [["layout.css.scroll-behavior.spring-constant", 10],
+             ["apz.test.mac.synth_wheel_input", true]]},
+  {"file": "helper_scroll_snap_resnap_after_async_scroll.html",
+    "prefs": [["general.smoothScroll", false],
+             ["apz.test.mac.synth_wheel_input", true]]},
+  {"file": "helper_scroll_snap_resnap_after_async_scrollBy.html",
+    // Same as above helper_scroll_snap_resnap_after_async_scroll.html.
+   "prefs": [["layout.css.scroll-behavior.spring-constant", 10]]},
+  {"file": "helper_scroll_snap_not_resnap_during_panning.html",
+    // Specify a strong spring constant to make scroll snap animation be
+    // effective in a short span of time.
+   "prefs": [["layout.css.scroll-behavior.spring-constant", 1000]]},
+  {"file": "helper_scroll_snap_not_resnap_during_scrollbar_dragging.html",
+    // Same as above helper_scroll_snap_not_resnap_during_scrollbar_dragging.html.
+   "prefs": [["layout.css.scroll-behavior.spring-constant", 1000]]},
+  {"file": "helper_bug1780701.html"},
+  {"file": "helper_bug1783936.html",
+             // Shorten the scroll snap animation duration.
+   "prefs": [["layout.css.scroll-behavior.spring-constant", 1000],
+             // Avoid fling at the end of pan.
+             ["apz.fling_min_velocity_threshold", "10000"],
+             // This test needs mSimilateMomentum flag on headless mode.
+             ["apz.test.headless.simulate_momentum", true],
+             ["apz.gtk.kinetic_scroll.enabled", true],
+             // Use the pixel mode to make the test predictable easily.
+             ["apz.gtk.kinetic_scroll.delta_mode", 2],
+             ["apz.gtk.kinetic_scroll.pixel_delta_mode_multiplier", 1]]},
+];
+
+if (isApzEnabled()) {
+  SimpleTest.waitForExplicitFinish();
+  window.onload = function() {
+    runSubtestsSeriallyInFreshWindows(subtests)
+    .then(SimpleTest.finish, SimpleTest.finishWithFailure);
+  };
+}
+
+  </script>
+</head>
+<body>
+</body>
+</html>