diff --git a/run_tests.sh b/run_tests.sh
index 26a04aa..eac8b09 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -e
 
 # This script will clone project from $GIT_URL (if defined)
 # and run tox in project directory