diff --git a/pygac/tests/test_klm.py b/pygac/tests/test_klm.py
index 0c5caff..0e27d60 100644
--- a/pygac/tests/test_klm.py
+++ b/pygac/tests/test_klm.py
@@ -24,7 +24,6 @@
 """Test the GAC KLM reader.
 """
 
-import os
 import datetime as dt
 import numpy as np
 import numpy.testing