diff --git a/run-tests.sh b/run-tests.sh
index b38df6407..163749159 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -5,7 +5,7 @@ TESTS=`git grep -l doctest Lib/`
 ret=0
 for test in $TESTS; do
 	echo "Running tests in $test"
-	if ! python $test; then
+	if ! python -m doctest -v $test; then
 		let ret=ret+1
 	fi
 done