1 files changed, 17 insertions, 0 deletions
diff --git a/testing/web-platform/tests/user-timing/clear_all_marks.any.js b/testing/web-platform/tests/user-timing/clear_all_marks.any.js
new file mode 100644
index 0000000000..35cd2a04f6
--- /dev/null
+++ b/testing/web-platform/tests/user-timing/clear_all_marks.any.js
@@ -0,0 +1,17 @@
+test(function() {
+    self.performance.mark("mark1");
+    self.performance.mark("mark2");
+
+    // test that two marks have been created
+    var entries = self.performance.getEntriesByType("mark");
+    assert_equals(entries.length, 2, "Two marks have been created for this test.");
+
+    // clear all marks
+    self.performance.clearMarks();
+
+    // test that all marks were cleared
+    entries = self.performance.getEntriesByType("mark");
+
+    assert_equals(entries.length, 0, "All marks have been cleared.");
+
+}, "Clearing all marks remove all of them.");