default host to localhost

diff --git a/templates/install-wp-tests.sh b/templates/install-wp-tests.sh
index 7d25722..2357d1a 100644 (file)
--- a/templates/install-wp-tests.sh
+++ b/templates/install-wp-tests.sh
@@ -8,7 +8,7 @@ fi
 DB_NAME=$1
 DB_USER=$2
 DB_PASS=$3
-DB_HOST=$4
+DB_HOST=${4:-localhost}
 WP_VERSION=${5-master}
 
 set -ex