diff --git a/Dockerfile b/Dockerfile
index aba374a..827e1ca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@
 # global openstack requirements repo
 # This is the commit where tempest version is 17.2.0 in u-c
 ARG UPPER_CONSTRAINTS_TAG="83b1de74834fbcdbe749e270c29e76cdc28f85d5"
-#
+
 ENV DEBIAN_FRONTEND=noninteractive \
     DEBCONF_NONINTERACTIVE_SEEN=true \
     LANG=C.UTF-8 \