diff --git a/tests/letstest/scripts/test_apache2.sh b/tests/letstest/scripts/test_apache2.sh
index 4036e6efa..be8d8d2bc 100755
--- a/tests/letstest/scripts/test_apache2.sh
+++ b/tests/letstest/scripts/test_apache2.sh
@@ -54,6 +54,7 @@ if [ $? -ne 0 ] ; then
 fi
 
 if [ "$OS_TYPE" = "ubuntu" ] ; then
+    export ACME_SERVER_URI="$BOULDER_URL"
     venv/bin/tox -e apacheconftest
 else
     echo Not running hackish apache tests on $OS_TYPE