diff --git a/netwerk/test/mochitests/mochitest.ini b/netwerk/test/mochitests/mochitest.ini
index bbfa839e43ee..ade78caea7ab 100644
--- a/netwerk/test/mochitests/mochitest.ini
+++ b/netwerk/test/mochitests/mochitest.ini
@@ -6,4 +6,5 @@ support-files =
 
 [test_partially_cached_content.html]
 [test_user_agent_overrides.html]
+skip-if = true # bug 942470, intermittently fails to unset overrides
 [test_user_agent_updates.html]