diff --git a/js/src/tests/js1_5/Regress/jstests.list b/js/src/tests/js1_5/Regress/jstests.list
index 58cc32586f81..ae3757845184 100644
--- a/js/src/tests/js1_5/Regress/jstests.list
+++ b/js/src/tests/js1_5/Regress/jstests.list
@@ -185,7 +185,7 @@ script regress-350312.js
 script regress-350415.js
 script regress-350529.js
 skip script regress-350692.js # obsolete test
-script regress-351116.js
+skip-if(xulRuntime.OS=="Linux"&&!xulRuntime.shell&&!XPCOMABI.match(/x86_64/)&&isDebugBuild) script regress-351116.js # bug 521549
 script regress-351515.js
 script regress-352009.js
 script regress-352197.js