diff --git a/.fixtures.yml b/.fixtures.yml
index 3ec49cbe..25a13eb1 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -1,7 +1,9 @@
 fixtures:
   repositories:
     'inifile':  'git://github.com/puppetlabs/puppetlabs-inifile'
-    'concat': 'git://github.com/puppetlabs/puppetlabs-concat.git'
+    'concat':
+      'repo': 'git://github.com/puppetlabs/puppetlabs-concat.git'
+      'ref': '1.2.1'
     'keystone': 'git://github.com/stackforge/puppet-keystone.git'
     'mysql': 'git://github.com/puppetlabs/puppetlabs-mysql.git'
     'openstacklib': 'git://github.com/stackforge/puppet-openstacklib.git'