diff --git a/tests/test_cmd.py b/tests/test_cmd.py
index e088792..0a72ada 100644
--- a/tests/test_cmd.py
+++ b/tests/test_cmd.py
@@ -44,5 +44,3 @@ def test_cmdline_argv():
     argv = cmdline_argv()
     for s in argv[1:]:
         assert isinstance(s, string_types)
-
-
diff --git a/tests/test_system.py b/tests/test_system.py
index 7b2ee26..983bc81 100644
--- a/tests/test_system.py
+++ b/tests/test_system.py
@@ -1,8 +1,6 @@
 import os
 import stat
 import time
-import tempfile
-
 import pytest
 
 from pydu.platform import WINDOWS