diff --git a/tools/test.py b/tools/test.py
index f204004c7a63f1..9a7de5ed24d706 100755
--- a/tools/test.py
+++ b/tools/test.py
@@ -896,7 +896,7 @@ def GetTestStatus(self, context, sections, defs):
 
 
 TIMEOUT_SCALEFACTOR = {
-    'arm'   : { 'debug' :  8, 'release' : 2 }, # The ARM buildbots are slow.
+    'arm'   : { 'debug' :  8, 'release' : 3 }, # The ARM buildbots are slow.
     'ia32'  : { 'debug' :  4, 'release' : 1 },
     'ppc'   : { 'debug' :  4, 'release' : 1 },
     's390'  : { 'debug' :  4, 'release' : 1 } }