diff --git a/tests/wpt/mozilla/meta/mozilla/worklets/__dir__.ini b/tests/wpt/mozilla/meta/mozilla/worklets/__dir__.ini
index 43043a1b6c3..c000a50cb3b 100644
--- a/tests/wpt/mozilla/meta/mozilla/worklets/__dir__.ini
+++ b/tests/wpt/mozilla/meta/mozilla/worklets/__dir__.ini
@@ -1 +1 @@
-prefs: [dom.worklet.enabled:true,dom.worklet.blockingsleep.enabled:true]
+prefs: [dom.worklet.enabled:true,dom.worklet.blockingsleep.enabled:true,dom.worklet.timeout_ms:5000]
diff --git a/tests/wpt/mozilla/meta/mozilla/worklets/test_paint_worklet_timeout.html.ini b/tests/wpt/mozilla/meta/mozilla/worklets/test_paint_worklet_timeout.html.ini
new file mode 100644
index 00000000000..b99ea5a3ee9
--- /dev/null
+++ b/tests/wpt/mozilla/meta/mozilla/worklets/test_paint_worklet_timeout.html.ini
@@ -0,0 +1,3 @@
+[test_paint_worklet_timeout.html]
+  type: testharness
+  prefs: [dom.worklet.timeout_ms:10]