diff --git a/dom/imptests/editing/selecttest/test_collapse.html b/dom/imptests/editing/selecttest/test_collapse.html
index 583bf0c871a..abf01971c4c 100644
--- a/dom/imptests/editing/selecttest/test_collapse.html
+++ b/dom/imptests/editing/selecttest/test_collapse.html
@@ -8,7 +8,7 @@
 "use strict";
 
 if (W3CTest.runner) {
-  W3CTest.runner.requestLongerTimeout(2);
+  W3CTest.runner.requestLongerTimeout(5);
 }
 
 function testCollapse(range, point) {