diff --git a/ci/ci_test.py b/ci/ci_test.py
index 4752a1a..748bb52 100644
--- a/ci/ci_test.py
+++ b/ci/ci_test.py
@@ -1,3 +1,4 @@
+import os
 from logzero import logger
 
 working_directory = os.path.dirname(os.path.abspath(__file__))