diff --git a/Tests/run.py b/Tests/run.py
index 14c9f6d5c..8ce2e714a 100644
--- a/Tests/run.py
+++ b/Tests/run.py
@@ -37,7 +37,7 @@ include = [x for x in sys.argv[1:] if x[:2] != "--"]
 skipped = []
 
 # XXX Skip test, is there a better way?
-files.remove('Tests/test_file_tiff.py')
+files.remove(os.path.join('Tests', 'test_file_tiff.py'))
 skipped.append('test_file_tiff')
 
 python_options = " ".join(python_options)