diff --git a/tests.sh b/tests.sh
index 2b3b9ed..9d6fdfb 100755
--- a/tests.sh
+++ b/tests.sh
@@ -2,6 +2,9 @@
 # author: deadc0de6 (https://github.com/deadc0de6)
 # Copyright (c) 2017, deadc0de6
 
+# stop on first error
+set -ev
+
 pep8 dotdrop/
 pep8 tests/
 PYTHONPATH=dotdrop nosetests -w tests