diff --git a/src/ifcbimtester/startbimtester.py b/src/ifcbimtester/startbimtester.py
index d0510ae66b..55bfd19c23 100644
--- a/src/ifcbimtester/startbimtester.py
+++ b/src/ifcbimtester/startbimtester.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 import argparse
+import os
 
 from bimtester import clean
 from bimtester import reports