diff --git a/tests/test_mol.py b/tests/test_mol.py
index 0ac4ae59..bd0d3956 100644
--- a/tests/test_mol.py
+++ b/tests/test_mol.py
@@ -345,6 +345,8 @@ def test_software_category(self):
         software = output_block.get_mmcif_category('_software')
         del software['date']
         del software['description']
+        del software['contact_author']
+        del software['contact_author_email']
         assert software['version'][0] is False
         software['version'][0] = None
         self.assertEqual(input_block.get_mmcif_category('_software'), software)