diff --git a/Tests/test_file_libtiff.py b/Tests/test_file_libtiff.py
index 79abe5961..a53593a9e 100644
--- a/Tests/test_file_libtiff.py
+++ b/Tests/test_file_libtiff.py
@@ -1,5 +1,5 @@
 from tester import *
-import warnings
+import os
 
 from PIL import Image, TiffImagePlugin
 
@@ -35,7 +35,6 @@ def test_g4_tiff():
 
     assert_equal(im.size, (500,500))
     _assert_noerr(im)
-    im = None
 
 def test_g4_large():
     file = "Tests/images/pport_g4.tif"
@@ -298,8 +297,6 @@ def xtest_bw_compression_wRGB():
     assert_exception(IOError, lambda: im.save(out, compression='group4'))
 
 def test_fp_leak():
-    import os
-
     im = Image.open("Tests/images/lena_g4_500.tif")
     fn = im.fp.fileno()