diff --git a/Lib/email/test/test_email.py b/Lib/email/test/test_email.py
index 7659e2a..8eaa85e 100644
--- a/Lib/email/test/test_email.py
+++ b/Lib/email/test/test_email.py
@@ -833,11 +833,11 @@
         eq = self.ndiffAssertEqual
         m = '''\
 Received: from siimage.com ([172.25.1.3]) by zima.siliconimage.com with Microsoft SMTPSVC(5.0.2195.4905);
-	Wed, 16 Oct 2002 07:41:11 -0700'''
+\tWed, 16 Oct 2002 07:41:11 -0700'''
         msg = email.message_from_string(m)
         eq(msg.as_string(), '''\
 Received: from siimage.com ([172.25.1.3]) by zima.siliconimage.com with
-	Microsoft SMTPSVC(5.0.2195.4905); Wed, 16 Oct 2002 07:41:11 -0700
+\tMicrosoft SMTPSVC(5.0.2195.4905); Wed, 16 Oct 2002 07:41:11 -0700
 
 ''')
 
@@ -851,7 +851,7 @@
         msg['List'] = Header(h, header_name='List')
         eq(msg.as_string(), """\
 List: List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/spamassassin-talk>,
-	<mailto:spamassassin-talk-request@lists.sourceforge.net?subject=unsubscribe>
+\t<mailto:spamassassin-talk-request@lists.sourceforge.net?subject=unsubscribe>
 List: List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/spamassassin-talk>,
  <mailto:spamassassin-talk-request@lists.sourceforge.net?subject=unsubscribe>