diff --git a/Makefile b/Makefile
index efc50dc..fb75c08 100644
--- a/Makefile
+++ b/Makefile
@@ -82,11 +82,11 @@
 	PYTHONPATH=. ./utest/test_test_data.py
 
 check-py: python
-	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi python py_gen/tests/generic_util.py
-	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi python py_gen/tests/of10.py
-	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi python py_gen/tests/of11.py
-	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi python py_gen/tests/of12.py
-	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi python py_gen/tests/of13.py
+	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi:. python py_gen/tests/generic_util.py
+	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi:. python py_gen/tests/of10.py
+	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi:. python py_gen/tests/of11.py
+	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi:. python py_gen/tests/of12.py
+	PYTHONPATH=${LOXI_OUTPUT_DIR}/pyloxi:. python py_gen/tests/of13.py
 
 pylint:
 	pylint -E ${LOXI_PY_FILES}