diff --git a/tests/persistence/test_pickle.py b/tests/persistence/test_pickle.py
index 543b204c..dd68b4fd 100644
--- a/tests/persistence/test_pickle.py
+++ b/tests/persistence/test_pickle.py
@@ -9,8 +9,6 @@
 
 import plumpy
 
-import plumpy
-
 
 class TestPicklePersister(unittest.TestCase):
     def test_save_load_roundtrip(self):