diff --git a/test/ubuntu_20.Dockerfile b/test/ubuntu_20.Dockerfile
index c071fcd9..caa6261f 100644
--- a/test/ubuntu_20.Dockerfile
+++ b/test/ubuntu_20.Dockerfile
@@ -7,6 +7,7 @@ RUN mkdir -p $GITDIR $SCRIPTDIR /etc/pihole
 ADD . $GITDIR
 RUN cp $GITDIR/advanced/Scripts/*.sh $GITDIR/gravity.sh $GITDIR/pihole $GITDIR/automated\ install/*.sh $SCRIPTDIR/
 ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
+ENV DEBIAN_FRONTEND=noninteractive
 
 RUN true && \
     chmod +x $SCRIPTDIR/*