diff --git a/test/test_pdb_to_cif.py b/test/test_pdb_to_cif.py
index 0ff562d..a0b279f 100644
--- a/test/test_pdb_to_cif.py
+++ b/test/test_pdb_to_cif.py
@@ -20,7 +20,6 @@
 
 class Tests(unittest.TestCase):
     def compare_files(self, f1, f2):
-        self.maxDiff=None
         with open(f1) as fh:
             f1_contents = fh.read()
         with open(f2) as fh: