1 files changed, 19 insertions, 3 deletions
diff --git a/testing/web-platform/tests/css/css-scroll-snap-2/snapchanging/snapchanging-on-user-scroll.tentative.html b/testing/web-platform/tests/css/css-scroll-snap-2/snapchanging/snapchanging-on-user-scroll.tentative.html
index 27f52efc71..3755369a2f 100644
--- a/testing/web-platform/tests/css/css-scroll-snap-2/snapchanging/snapchanging-on-user-scroll.tentative.html
+++ b/testing/web-platform/tests/css/css-scroll-snap-2/snapchanging/snapchanging-on-user-scroll.tentative.html
@@ -181,10 +181,26 @@
         assertSnapEvent(evts[1], { block: snap_area_1, inline: null });
       }, "snapchanging fires as scroll moves through different snap targets.");
 
+      // Touch scroll test.
       promise_test(async (t) => {
-        await test_user_scroll_onsnapchanging(t, scroller, scroller,
-                                             snap_area_2);
-      }, "Element.onsnapchanging fires when scrolling a snap container.");
+        await waitForCompositorCommit();
+        const scroller_middle = Math.round(scroller.clientWidth / 2);
+        const test_data = {
+          scroller: scroller,
+          scrolling_function: async () => {
+            const start_pos = { x: scroller_middle, y: snap_area_2.offsetTop };
+            const end_pos = { x: scroller_middle, y: 0 };
+            await snap_event_touch_scroll_helper(start_pos, end_pos);
+          },
+          expected_snap_targets: { block: snap_area_2, inline: null },
+          expected_scroll_offsets: {
+            x: 0,
+            y: snap_area_2.offsetTop
+          }
+        };
+        await test_snap_event(t, test_data, "snapchanging",
+                              /*use_onsnap_member*/true);
+      }, "touch scrolling fires Element.onsnapchanging.");
 
     // snapchanging doesn't fire test.
     promise_test(async (t) => {