Add missing parameter into tests
diff --git a/tests/pillar/single.sls b/tests/pillar/single.sls
index ce341ce..fa7ba80 100644
--- a/tests/pillar/single.sls
+++ b/tests/pillar/single.sls
@@ -1,6 +1,7 @@
 cassandra:
   server:
     enabled: true
+    version: 2
     name: 'cassandra'
     bind:
       address: 127.0.0.1