diff --git a/gitlab-ci-git-buildpackage b/gitlab-ci-git-buildpackage
index b68e141..813bb4e 100755
--- a/gitlab-ci-git-buildpackage
+++ b/gitlab-ci-git-buildpackage
@@ -11,6 +11,10 @@ if [[ ! -f $lockfile ]] ; then
     set -e
     set -x
 
+    if [ ! -z "$DEBIAN_RELEASE" ]; then
+        sed -i "s, testing , $DEBIAN_RELEASE ," /etc/apt/sources.list
+    fi
+
     apt-get -qy update
     apt-get -qy dist-upgrade