diff --git a/test/fixtures/wpt/README.md b/test/fixtures/wpt/README.md
index 457a05f07d5306..51450f918bd1b8 100644
--- a/test/fixtures/wpt/README.md
+++ b/test/fixtures/wpt/README.md
@@ -16,6 +16,7 @@ Last update:
- resources: https://github.com/web-platform-tests/wpt/tree/679a364421/resources
- interfaces: https://github.com/web-platform-tests/wpt/tree/712c9f275e/interfaces
- html/webappapis/microtask-queuing: https://github.com/web-platform-tests/wpt/tree/0c3bed38df/html/webappapis/microtask-queuing
+- html/webappapis/timers: https://github.com/web-platform-tests/wpt/tree/ddfe9c089b/html/webappapis/timers
[Web Platform Tests]: https://github.com/web-platform-tests/wpt
[`git node wpt`]: https://github.com/nodejs/node-core-utils/blob/master/docs/git-node.md#git-node-wpt
diff --git a/test/fixtures/wpt/html/webappapis/timers/evil-spec-example.html b/test/fixtures/wpt/html/webappapis/timers/evil-spec-example.html
new file mode 100644
index 00000000000000..77a8746908d742
--- /dev/null
+++ b/test/fixtures/wpt/html/webappapis/timers/evil-spec-example.html
@@ -0,0 +1,23 @@
+
+Interaction of setTimeout and WebIDL
+
+
+
+
+
+
+
+
diff --git a/test/fixtures/wpt/html/webappapis/timers/missing-timeout-setinterval.any.js b/test/fixtures/wpt/html/webappapis/timers/missing-timeout-setinterval.any.js
new file mode 100644
index 00000000000000..33a1cc073c8c1f
--- /dev/null
+++ b/test/fixtures/wpt/html/webappapis/timers/missing-timeout-setinterval.any.js
@@ -0,0 +1,34 @@
+function timeout_trampoline(t, timeout, message) {
+ t.step_timeout(function() {
+ // Yield in case we managed to be called before the second interval callback.
+ t.step_timeout(function() {
+ assert_unreached(message);
+ }, timeout);
+ }, timeout);
+}
+
+async_test(function(t) {
+ let ctr = 0;
+ let h = setInterval(t.step_func(function() {
+ if (++ctr == 2) {
+ clearInterval(h);
+ t.done();
+ return;
+ }
+ }) /* no interval */);
+
+ timeout_trampoline(t, 100, "Expected setInterval callback to be called two times");
+}, "Calling setInterval with no interval should be the same as if called with 0 interval");
+
+async_test(function(t) {
+ let ctr = 0;
+ let h = setInterval(t.step_func(function() {
+ if (++ctr == 2) {
+ clearInterval(h);
+ t.done();
+ return;
+ }
+ }), undefined);
+
+ timeout_trampoline(t, 100, "Expected setInterval callback to be called two times");
+}, "Calling setInterval with undefined interval should be the same as if called with 0 interval");
diff --git a/test/fixtures/wpt/html/webappapis/timers/negative-setinterval.html b/test/fixtures/wpt/html/webappapis/timers/negative-setinterval.html
new file mode 100644
index 00000000000000..430d13c58aab69
--- /dev/null
+++ b/test/fixtures/wpt/html/webappapis/timers/negative-setinterval.html
@@ -0,0 +1,17 @@
+
+Negative timeout in setInterval
+
+
+
diff --git a/test/fixtures/wpt/html/webappapis/timers/negative-settimeout.html b/test/fixtures/wpt/html/webappapis/timers/negative-settimeout.html
new file mode 100644
index 00000000000000..57e88ee701d807
--- /dev/null
+++ b/test/fixtures/wpt/html/webappapis/timers/negative-settimeout.html
@@ -0,0 +1,8 @@
+
+Negative timeout in setTimeout
+
+
+
diff --git a/test/fixtures/wpt/html/webappapis/timers/type-long-setinterval.html b/test/fixtures/wpt/html/webappapis/timers/type-long-setinterval.html
new file mode 100644
index 00000000000000..af029959984668
--- /dev/null
+++ b/test/fixtures/wpt/html/webappapis/timers/type-long-setinterval.html
@@ -0,0 +1,13 @@
+
+Type long timeout for setInterval
+
+
+
diff --git a/test/fixtures/wpt/html/webappapis/timers/type-long-settimeout.html b/test/fixtures/wpt/html/webappapis/timers/type-long-settimeout.html
new file mode 100644
index 00000000000000..31fa4f1264211e
--- /dev/null
+++ b/test/fixtures/wpt/html/webappapis/timers/type-long-settimeout.html
@@ -0,0 +1,8 @@
+
+Type long timeout for setTimeout
+
+
+
diff --git a/test/fixtures/wpt/versions.json b/test/fixtures/wpt/versions.json
index 4ca402a3491d4c..7bd65d90237370 100644
--- a/test/fixtures/wpt/versions.json
+++ b/test/fixtures/wpt/versions.json
@@ -22,5 +22,9 @@
"html/webappapis/microtask-queuing": {
"commit": "0c3bed38df6d9dcd1441873728fb5c1bb59c92df",
"path": "html/webappapis/microtask-queuing"
+ },
+ "html/webappapis/timers": {
+ "commit": "ddfe9c089bab565a9d3aa37bdef63d8012c1a94c",
+ "path": "html/webappapis/timers"
}
}
\ No newline at end of file
diff --git a/test/wpt/status/html/webappapis/timers.json b/test/wpt/status/html/webappapis/timers.json
new file mode 100644
index 00000000000000..0967ef424bce67
--- /dev/null
+++ b/test/wpt/status/html/webappapis/timers.json
@@ -0,0 +1 @@
+{}
diff --git a/test/wpt/test-timers.js b/test/wpt/test-timers.js
new file mode 100644
index 00000000000000..a9fc262d3b1beb
--- /dev/null
+++ b/test/wpt/test-timers.js
@@ -0,0 +1,18 @@
+'use strict';
+
+// Flags: --expose-internals
+
+require('../common');
+const { WPTRunner } = require('../common/wpt');
+
+const runner = new WPTRunner('html/webappapis/timers');
+
+// Copy global descriptors from the global object
+runner.copyGlobalsFromObject(global, [
+ 'setInterval',
+ 'clearInterval',
+ 'setTimeout',
+ 'clearTimeout'
+]);
+
+runner.runJsTests();