diff --git a/tests/scripts/check-python-files.sh b/tests/scripts/check-python-files.sh
index 51e8079..cf1f87a 100755
--- a/tests/scripts/check-python-files.sh
+++ b/tests/scripts/check-python-files.sh
@@ -62,6 +62,7 @@
 
 echo
 echo 'Running mypy ...'
+export MYPYPATH="../../scripts"
 $PYTHON -m mypy scripts/*.py tests/scripts/*.py ||
   ret=1