diff --git a/tests/boulder-fetch.sh b/tests/boulder-fetch.sh
index ef61fe3f5..d9a979667 100755
--- a/tests/boulder-fetch.sh
+++ b/tests/boulder-fetch.sh
@@ -12,5 +12,7 @@ fi
 
 cd ${BOULDERPATH}
 FAKE_DNS=$(ifconfig docker0 | grep "inet addr:" | cut -d: -f2 | awk '{ print $1}')
+[ -z "$FAKE_DNS" ] && FAKE_DNS=$(ifconfig docker0 | grep "inet " | xargs | cut -d ' ' -f 2)
+[ -z "$FAKE_DNS" ] && echo Unable to find the IP for docker0 && exit 1
 sed -i "s/FAKE_DNS: .*/FAKE_DNS: ${FAKE_DNS}/" docker-compose.yml
 docker-compose up -d