diff --git a/docshell/base/crashtests/crashtests.list b/docshell/base/crashtests/crashtests.list
index 399f4c0a0c8f..1fee6f2a360d 100644
--- a/docshell/base/crashtests/crashtests.list
+++ b/docshell/base/crashtests/crashtests.list
@@ -12,6 +12,6 @@ load 514779-1.xhtml
 load 614499-1.html
 load 678872-1.html
 skip-if(Android) pref(dom.disable_open_during_load,false) load 914521.html # Android bug 1584562
-pref(browser.send_pings,true) load 1257730-1.html
+pref(browser.send_pings,true) asserts(0-2) load 1257730-1.html # bug 566159
 load 1331295.html
 load 1341657.html