diff --git a/Makefile b/Makefile
index f8c821db..07dadcac 100644
--- a/Makefile
+++ b/Makefile
@@ -7,11 +7,11 @@ test:
 	cargo test
 	${MAKE} clippy
 	tox
-	for example in examples/*; do tox -e py -c $$example/tox.ini; done
+	for example in examples/*; do tox -e py -c $$example/tox.ini || exit 1; done
 
 test_py3:
 	tox -e py3
-	for example in examples/*; do tox -e py3 -c $$example/tox.ini; done
+	for example in examples/*; do tox -e py3 -c $$example/tox.ini || exit 1; done
 
 fmt:
 	cargo fmt --all -- --check