diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -3451,7 +3451,7 @@
         Content-Type: text/plain; charset="utf-8"
         Content-Transfer-Encoding: base64
 
-        0JTQsCwg0L7QvdC4INC70LXRgtGP0YIuCg==
+        0JTQsCwg0L7QvdC4INC70LXRgtGP0YIuDQo=
         """)
 
     def test_generator_handles_8bit(self):
@@ -4075,6 +4075,12 @@
         CharsetModule.add_charset('fake', CharsetModule.QP, None, 'utf-8')
         c = Charset('fake')
         eq('hello world', c.body_encode('hello world'))
+        # Test for issue #975330. Replacing \r or \n with \r\n.
+        from email.base64mime import decode as base64decode
+        c = Charset()
+        c.body_encoding = 2
+        eq(b'hello\r\n world', base64decode(c.body_encode('hello\r world')))
+        eq(b'hello\r\n world\r\n', base64decode(c.body_encode('hello\r world\n')))
 
     def test_unicode_charset_name(self):
         charset = Charset('us-ascii')