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diff --git a/testing/web-platform/tests/animation-worklet/worklet-animation-without-target.https.html b/testing/web-platform/tests/animation-worklet/worklet-animation-without-target.https.html
new file mode 100644
index 0000000000..bfb6b4faee
--- /dev/null
+++ b/testing/web-platform/tests/animation-worklet/worklet-animation-without-target.https.html
@@ -0,0 +1,76 @@
+<!DOCTYPE html>
+<title>Verify that effect without target is supported</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/web-animations/testcommon.js"></script>
+<script src="common.js"></script>
+
+<div id="box"></div>
+
+<script>
+
+setup(setupAndRegisterTests, {explicit_done: true});
+
+async function setupAndRegisterTests() {
+  await registerPassthroughAnimator();
+
+  promise_test(async t => {
+    const effect = new KeyframeEffect(null,
+      { transform: ['translateY(100px)', 'translateY(200px)'] },
+      { duration: Infinity, iterations: 1 }
+    );
+    const animation = new WorkletAnimation('passthrough', effect);
+    animation.play();
+
+    // Allow one async animation frame to pass so that animation is running.
+    await waitForAsyncAnimationFrames(1);
+    assert_equals(animation.playState, "running");
+    // Allow time to advance so that we have a non-zero current time.
+    await waitForDocumentTimelineAdvance();
+    const t0 = document.timeline.currentTime;
+    assert_greater_than(animation.currentTime, 0);
+    assert_times_equal(animation.currentTime, (t0 - animation.startTime));
+    assert_equals(animation.playState, "running");
+
+    animation.cancel();
+  }, 'Animating effect with no target should work.');
+
+  promise_test(async t => {
+    const effect = new KeyframeEffect(document.getElementById('box'),
+      { transform: ['translateY(100px)', 'translateY(200px)'] },
+      { duration: Infinity, iterations: 1 }
+    );
+
+    const animation = new WorkletAnimation('passthrough', effect);
+    animation.play();
+
+    // Allow one async animation frame to pass so that animation is running.
+    await waitForAsyncAnimationFrames(1);
+    assert_equals(animation.playState, "running");
+    // Allow time to advance so that we have a non-zero current time.
+    await waitForDocumentTimelineAdvance();
+    const t0 = document.timeline.currentTime;
+    assert_greater_than(animation.currentTime, 0);
+    assert_times_equal(animation.currentTime, (t0 - animation.startTime));
+    assert_equals(animation.playState, "running");
+
+    await waitForDocumentTimelineAdvance();
+    animation.effect.target = null;
+    const t1 = document.timeline.currentTime;
+    assert_times_equal(animation.currentTime, (t1 - animation.startTime));
+    assert_equals(animation.playState, "running");
+
+    await waitForDocumentTimelineAdvance();
+    animation.effect.target = document.getElementById('box');
+    const t2 = document.timeline.currentTime;
+    assert_times_equal(animation.currentTime, (t2 - animation.startTime));
+    assert_equals(animation.playState, "running");
+
+    animation.cancel();
+  }, 'The existence of a target does not affect the animation.');
+
+  done();
+}
+</script>