diff --git a/dom/workers/test/mochitest.ini b/dom/workers/test/mochitest.ini
index ce736abe8570..3cfdebb0bd6c 100644
--- a/dom/workers/test/mochitest.ini
+++ b/dom/workers/test/mochitest.ini
@@ -145,7 +145,6 @@ tags = mcb
 [test_location.html]
 [test_longThread.html]
 [test_multi_sharedWorker.html]
-skip-if = fission && debug # Timeouts
 [test_multi_sharedWorker_lifetimes.html]
 [test_navigator.html]
 support-files =