--- ZODB-5.4.0/setup.py.orig	2018-03-26 07:29:02.000000000 -0600
+++ ZODB-5.4.0/setup.py	2018-03-26 20:19:35.621276487 -0600
@@ -85,10 +85,12 @@ def alltests():
                     mod = __import__(
                         _modname(dirpath, base, os.path.splitext(filename)[0]),
                         {}, {}, ['*'])
-                    _unittests_only(suite, mod.test_suite())
+                    if (hasattr(mod, 'test_suite')):
+                        _unittests_only(suite, mod.test_suite())
         elif 'tests.py' in filenames:
             mod = __import__(_modname(dirpath, base, 'tests'), {}, {}, ['*'])
-            _unittests_only(suite, mod.test_suite())
+            if (hasattr(mod, 'test_suite')):
+                _unittests_only(suite, mod.test_suite())
     return suite
 
 def read(path):