--- a/mozilla-tests/production_config.py
+++ b/mozilla-tests/production_config.py
@@ -25,17 +25,17 @@ for i in range(1,171):
     SLAVES['win8']['t-w864-ix-%03i' % i] = {}
 
 for i in range(1,166):
     SLAVES['snowleopard']['t-snow-r4-%04i' % i] = {}
 
 for i in range(1,87) + range(88,101):
     SLAVES['mountainlion']['talos-mtnlion-r5-%03i' % i] = {}
 
-for i in range(1,29) + range(29,54):
+for i in range(1,29) + range(29,79):
     SLAVES['yosemite']['t-yosemite-r5-%04i' % i] = {}
 
 for i in range(22,910):
     SLAVES['panda_android']['panda-%04i' % i] = {
         'http_port': '30%03i' % i,
         'ssl_port': '31%03i' % i,
     }