diff --git a/playbooks/roles/os_tempest/templates/openstack_tempest_gate.sh.j2 b/playbooks/roles/os_tempest/templates/openstack_tempest_gate.sh.j2
index 91736ec354..c05872e1d4 100644
--- a/playbooks/roles/os_tempest/templates/openstack_tempest_gate.sh.j2
+++ b/playbooks/roles/os_tempest/templates/openstack_tempest_gate.sh.j2
@@ -73,7 +73,7 @@ branch="$branch"
 map = {'juno': '2015.next', 'icehouse': '2015.03'}
 
 url=("https://raw.githubusercontent.com/openstack/"
-     "defcore/master/%(version).json"
+     "defcore/master/%(version)s.json"
      % {'version': map[branch]}
      )
 response = requests.get(url)