diff --git a/suite/browser/test/browser/browser_bug462289.js b/suite/browser/test/browser/browser_bug462289.js
index da345e8c70..c61b9a0403 100644
--- a/suite/browser/test/browser/browser_bug462289.js
+++ b/suite/browser/test/browser/browser_bug462289.js
@@ -1,6 +1,6 @@
 // Wanted delay (in ms) to let UI fully update.
-// 250: hopefully enough (on slow test environments).
-var gDelay = 250;
+// 375: hopefully enough (on slow test environments).
+var gDelay = 375;
 
 var tab1, tab2;