1 files changed, 12 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/timers/negative-setinterval.any.js b/testing/web-platform/tests/html/webappapis/timers/negative-setinterval.any.js
new file mode 100644
index 0000000000..5646140c2a
--- /dev/null
+++ b/testing/web-platform/tests/html/webappapis/timers/negative-setinterval.any.js
@@ -0,0 +1,12 @@
+setup({ single_test: true });
+var i = 0;
+var interval;
+function next() {
+  i++;
+  if (i === 20) {
+    clearInterval(interval);
+    done();
+  }
+}
+setTimeout(assert_unreached, 1000);
+interval = setInterval(next, -100);