diff --git a/defaults/main.yml b/defaults/main.yml
index bdb456c..c984b8e 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -137,3 +137,4 @@ percona_repository: 'http://repo.percona.com/apt'
 # Galera
 mysql_galera_bootstrap: false
 mariadb_galera_members: []
+mysql_galera_primary_node: null
diff --git a/tests/travis.yml b/tests/travis.yml
index 0fec91f..10877c5 100644
--- a/tests/travis.yml
+++ b/tests/travis.yml
@@ -6,6 +6,7 @@
     mysql_bind_address: '{{ ansible_eth0.ipv4.address }}'
     mariadb_galera_members:
       - '{{ ansible_eth0.ipv4.address }}'
+    mysql_galera_primary_node: 'localhost'
   roles:
     - ../../
   post_tasks: