diff --git a/automated install/basic-install.sh b/automated install/basic-install.sh
index 534b194d..491f7b6d 100755
--- a/automated install/basic-install.sh	
+++ b/automated install/basic-install.sh	
@@ -1149,6 +1149,6 @@ main() {
 	echo "::: The install log is located at: /etc/pihole/install.log"
 }
 
-if [[ "${PHTEST}" != "TRUE" ]] ; then
+if [[ "${PH_TEST}" != true ]] ; then
     main "$@"
 fi
diff --git a/test/centos.Dockerfile b/test/centos.Dockerfile
index 9af7eb4d..00543b67 100644
--- a/test/centos.Dockerfile
+++ b/test/centos.Dockerfile
@@ -11,4 +11,6 @@ ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
 RUN true && \
     chmod +x $SCRIPTDIR/*
 
+ENV PH_TEST true
+
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \
diff --git a/test/debian.Dockerfile b/test/debian.Dockerfile
index b80d6155..931c0ba7 100644
--- a/test/debian.Dockerfile
+++ b/test/debian.Dockerfile
@@ -8,8 +8,9 @@ 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
 
-
 RUN true && \
     chmod +x $SCRIPTDIR/*
 
+ENV PH_TEST true
+
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \
diff --git a/test/test_automated_install.py b/test/test_automated_install.py
index a3c80666..ee3beeee 100644
--- a/test/test_automated_install.py
+++ b/test/test_automated_install.py
@@ -53,7 +53,6 @@ def test_setupVars_saved_to_file(Pihole):
     set -e
     echo start
     TERM=xterm
-    PHTEST=TRUE
     source /opt/pihole/basic-install.sh
     {}
     finalExports
@@ -69,7 +68,6 @@ def test_configureFirewall_firewalld_no_errors(Pihole):
     ''' confirms firewalld rules are applied when appopriate '''
     mock_command('firewall-cmd', '0', Pihole)
     configureFirewall = Pihole.run('''
-    PHTEST=TRUE
     source /opt/pihole/basic-install.sh
     configureFirewall
     ''')