diff --git a/Lib/test/test_urllib2.py b/Lib/test/test_urllib2.py
@@ -1851,9 +1851,17 @@ def test_parse_proxy(self):
             ('ftp', 'joe', 'password', 'proxy.example.com')),
            # Test for no trailing '/' case
            ('http://joe:password@proxy.example.com',
-             ('http', 'joe', 'password', 'proxy.example.com'))
        ]

        for tc, expected in parse_proxy_test_cases:
            self.assertEqual(_parse_proxy(tc), expected)


diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
@@ -773,7 +773,11 @@ def _parse_proxy(proxy):
            raise ValueError("proxy URL with no authority: %r" % proxy)
        # We have an authority, so for RFC 3986-compliant URLs (by ss 3.
        # and 3.3.), path is empty or starts with '/'
-        end = r_scheme.find("/", 2)
        if end == -1:
            end = None
        authority = r_scheme[2:end]

diff --git a/Misc/NEWS.d/next/Library/2020-12-27-18-47-01.bpo-23328._xqepZ.rst b/Misc/NEWS.d/next/Library/2020-12-27-18-47-01.bpo-23328._xqepZ.rst
@@ -0,0 +1 @@