diff --git a/letsencrypt-apache/letsencrypt_apache/tests/apache-conf-files/apache-conf-test b/letsencrypt-apache/letsencrypt_apache/tests/apache-conf-files/apache-conf-test
index 4e0443bb7..0afddbb33 100755
--- a/letsencrypt-apache/letsencrypt_apache/tests/apache-conf-files/apache-conf-test
+++ b/letsencrypt-apache/letsencrypt_apache/tests/apache-conf-files/apache-conf-test
@@ -49,7 +49,7 @@ if [ "$1" = --debian-modules ] ; then
     sudo apt-get install -y libapache2-mod-wsgi
     sudo apt-get install -y libapache2-mod-macro
 
-    for mod in  ssl rewrite macro wsgi deflate userdir version mime ; do
+    for mod in  ssl rewrite macro wsgi deflate userdir version mime setenvif ; do
         sudo a2enmod $mod
     done
 fi