diff --git a/django/http/request.py b/django/http/request.py
index 958cedfdbf..b718b09561 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -1,9 +1,7 @@
 import codecs
 import copy
 import operator
-
 from collections import namedtuple
-from cgi import parse_header
 from io import BytesIO
 from itertools import chain
 from urllib.parse import parse_qsl, quote, urlencode, urljoin, urlsplit
@@ -18,10 +16,7 @@ from django.core.exceptions import (
     TooManyFieldsSent,
 )
 from django.core.files import uploadhandler
-from django.http.multipartparser import (
-    MultiPartParser,
-    MultiPartParserError,
-)
+from django.http.multipartparser import MultiPartParser, MultiPartParserError
 from django.utils.datastructures import (
     CaseInsensitiveMapping,
     ImmutableList,
@@ -29,7 +24,7 @@ from django.utils.datastructures import (
 )
 from django.utils.encoding import escape_uri_path, iri_to_uri
 from django.utils.functional import cached_property
-from django.utils.http import is_same_domain
+from django.utils.http import is_same_domain, parse_header_parameters
 
 RAISE_ERROR = object()
 MAX_ALLOWED_FILES = 1000
@@ -136,7 +131,7 @@ class HttpRequest:
 
     def _set_content_type_params(self, meta):
         """Set content_type, content_params, and encoding."""
-        self.content_type, self.content_params = parse_header(
+        self.content_type, self.content_params = parse_header_parameters(
             meta.get("CONTENT_TYPE", "")
         )
         if "charset" in self.content_params:
@@ -437,7 +432,8 @@ class HttpRequest:
                 self._post, self._files = self.parse_file_upload(self.META, data)
                 if len(self._files) > MAX_ALLOWED_FILES:
                     raise MultiPartParserError(
-                        f"{len(self._files)} files processed. Maximum {MAX_ALLOWED_FILES} files allowed."
+                        f"{len(self._files)} files processed. "
+                        f"Maximum {MAX_ALLOWED_FILES} files allowed."
                     )
             except MultiPartParserError:
                 # An error occurred while parsing POST data. Since when
@@ -721,7 +717,7 @@ class QueryDict(MultiValueDict):
 
 class MediaType:
     def __init__(self, media_type_raw_line):
-        full_type, self.params = parse_header(
+        full_type, self.params = parse_header_parameters(
             media_type_raw_line if media_type_raw_line else ""
         )
         self.main_type, _, self.sub_type = full_type.partition("/")
diff --git a/tests/requests/tests.py b/tests/requests/tests.py
index 90e024afa1..71efc4f57e 100644
--- a/tests/requests/tests.py
+++ b/tests/requests/tests.py
@@ -421,7 +421,8 @@ class RequestsTests(SimpleTestCase):
 
     def test_POST_multipart_with_content_length_zero(self):
         """
-        Multipart POST requests with Content-Length >= 0 are valid and need to be handled.
+        Multipart POST requests with Content-Length >= 0
+        are valid and need to be handled.
         """
         # According to:
         # https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.13
@@ -591,7 +592,10 @@ class RequestsTests(SimpleTestCase):
                 "wsgi.input": FakePayload(),
             }
         )
-        msg = "Invalid non-ASCII Content-Type in multipart: multipart/form-data; boundary = à"
+        msg = (
+            "Invalid non-ASCII Content-Type in multipart: "
+            "multipart/form-data; boundary = à"
+        )
         with self.assertRaisesMessage(MultiPartParserError, msg):
             request.POST
 
@@ -1001,7 +1005,10 @@ class HostValidationTests(SimpleTestCase):
 
     @override_settings(ALLOWED_HOSTS=[])
     def test_get_host_suggestion_of_allowed_host(self):
-        """get_host() makes helpful suggestions if a valid-looking host is not in ALLOWED_HOSTS."""
+        """
+        get_host() makes helpful suggestions
+        if a valid-looking host is not in ALLOWED_HOSTS.
+        """
         msg_invalid_host = "Invalid HTTP_HOST header: %r."
         msg_suggestion = msg_invalid_host + " You may need to add %r to ALLOWED_HOSTS."
         msg_suggestion2 = (