diff --git a/run-tests.sh b/run-tests.sh
index 89795d2e..1aa20ace 100644
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+set -e
+
 PYPI_VENDOR_DIR="$(pwd)/tests/pypi/"
 export PYPI_VENDOR_DIR