Define Py_BUILD_CORE_MODULE

diff --git a/Lib/test/test_smtplib.py b/Lib/test/test_smtplib.py
index 9761a37..1a60fef 100644
--- a/Lib/test/test_smtplib.py
+++ b/Lib/test/test_smtplib.py
@@ -1171,7 +1171,7 @@ def auth_buggy(challenge=None):
         finally:
             smtp.close()
 
-    @hashlib_helper.requires_hashdigest('md5')
+    @hashlib_helper.requires_hashdigest('md5', openssl=True)
     def testAUTH_CRAM_MD5(self):
         self.serv.add_feature("AUTH CRAM-MD5")
         smtp = smtplib.SMTP(HOST, self.port, local_hostname='localhost',
@@ -1180,7 +1180,7 @@ def testAUTH_CRAM_MD5(self):
         self.assertEqual(resp, (235, b'Authentication Succeeded'))
         smtp.close()
 
-    @hashlib_helper.requires_hashdigest('md5')
+    @hashlib_helper.requires_hashdigest('md5', openssl=True)
     def testAUTH_multiple(self):
         # Test that multiple authentication methods are tried.
         self.serv.add_feature("AUTH BOGUS PLAIN LOGIN CRAM-MD5")