diff --git a/modules/libpr0n/test/crashtests/crashtests.list b/modules/libpr0n/test/crashtests/crashtests.list
index 339feef843b7..e4fef4a23278 100644
--- a/modules/libpr0n/test/crashtests/crashtests.list
+++ b/modules/libpr0n/test/crashtests/crashtests.list
@@ -8,5 +8,6 @@ load invalid-size.gif
 load invalid-size-second-frame.gif
 
 # Animated gifs with a very large canvas, but tiny actual content.
-load delaytest.html?523528-1.gif
-load delaytest.html?523528-2.gif
+# Disabled temporarily until fatal assertion is removed
+#load delaytest.html?523528-1.gif
+#load delaytest.html?523528-2.gif