diff --git a/tests/1_host_configuration.sh b/tests/1_host_configuration.sh
index 62b917b..5265036 100644
--- a/tests/1_host_configuration.sh
+++ b/tests/1_host_configuration.sh
@@ -49,7 +49,7 @@ fi
 
 # 1.7
 check_1_7="1.7  - Only allow trusted users to control Docker daemon"
-docker_users=`cat /etc/group | grep docker`
+docker_users=`grep docker /etc/group`
 info "$check_1_7"
 for u in $docker_users; do
   info "     * $u"