From 23c87874397a22ca80c0d6fa8648fb58ee3ab28a Mon Sep 17 00:00:00 2001
From: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Date: Thu, 12 Jan 2023 14:32:00 +0100
Subject: [PATCH] Refs #33348 -- Removed support for passing errors=None to
 SimpleTestCase.assertFormError()/assertFormsetErrors().

Per deprecation timeline.
---
 django/test/testcases.py  | 18 ------------------
 docs/releases/5.0.txt     |  3 +++
 tests/test_utils/tests.py | 34 ----------------------------------
 3 files changed, 3 insertions(+), 52 deletions(-)

diff --git a/django/test/testcases.py b/django/test/testcases.py
index c29a13a710..c37e99cded 100644
--- a/django/test/testcases.py
+++ b/django/test/testcases.py
@@ -724,15 +724,6 @@ class SimpleTestCase(unittest.TestCase):
 
         You can pass field=None to check the form's non-field errors.
         """
-        if errors is None:
-            warnings.warn(
-                "Passing errors=None to assertFormError() is deprecated, use "
-                "errors=[] instead.",
-                RemovedInDjango50Warning,
-                stacklevel=2,
-            )
-            errors = []
-
         if msg_prefix:
             msg_prefix += ": "
         errors = to_list(errors)
@@ -760,15 +751,6 @@ class SimpleTestCase(unittest.TestCase):
 
         Other parameters are the same as assertFormError().
         """
-        if errors is None:
-            warnings.warn(
-                "Passing errors=None to assertFormSetError() is deprecated, "
-                "use errors=[] instead.",
-                RemovedInDjango50Warning,
-                stacklevel=2,
-            )
-            errors = []
-
         if form_index is None and field is not None:
             raise ValueError("You must use field=None with form_index=None.")
 
diff --git a/docs/releases/5.0.txt b/docs/releases/5.0.txt
index 3b1db9a9ad..fb052b77f1 100644
--- a/docs/releases/5.0.txt
+++ b/docs/releases/5.0.txt
@@ -314,3 +314,6 @@ to remove usage of these features.
 
 * The ``opclasses`` argument of
   ``django.contrib.postgres.constraints.ExclusionConstraint`` is removed.
+
+* The undocumented ability to pass ``errors=None`` to
+  ``SimpleTestCase.assertFormError()`` and ``assertFormsetError()`` is removed.
diff --git a/tests/test_utils/tests.py b/tests/test_utils/tests.py
index a377479d38..f0c8735087 100644
--- a/tests/test_utils/tests.py
+++ b/tests/test_utils/tests.py
@@ -1769,23 +1769,6 @@ class AssertFormErrorDeprecationTests(SimpleTestCase):
     signature.
     """
 
-    @ignore_warnings(category=RemovedInDjango50Warning)
-    def test_assert_form_error_errors_none(self):
-        msg = (
-            "The errors of field 'field' on form <TestForm bound=True, valid=False, "
-            "fields=(field)> don't match."
-        )
-        with self.assertRaisesMessage(AssertionError, msg):
-            self.assertFormError(TestForm.invalid(), "field", None)
-
-    def test_assert_form_error_errors_none_warning(self):
-        msg = (
-            "Passing errors=None to assertFormError() is deprecated, use "
-            "errors=[] instead."
-        )
-        with self.assertWarnsMessage(RemovedInDjango50Warning, msg):
-            self.assertFormError(TestForm.valid(), "field", None)
-
     def _assert_form_error_old_api_cases(self, form, field, errors, msg_prefix):
         response = mock.Mock(context=[{"form": TestForm.invalid()}])
         return (
@@ -1852,23 +1835,6 @@ class AssertFormErrorDeprecationTests(SimpleTestCase):
                 with self.assertRaises(AssertionError):
                     self.assertFormError(*args, **kwargs)
 
-    @ignore_warnings(category=RemovedInDjango50Warning)
-    def test_assert_formset_error_errors_none(self):
-        msg = (
-            "The errors of field 'field' on form 0 of formset <TestFormset: bound=True "
-            "valid=False total_forms=1> don't match."
-        )
-        with self.assertRaisesMessage(AssertionError, msg):
-            self.assertFormSetError(TestFormset.invalid(), 0, "field", None)
-
-    def test_assert_formset_error_errors_none_warning(self):
-        msg = (
-            "Passing errors=None to assertFormSetError() is deprecated, use "
-            "errors=[] instead."
-        )
-        with self.assertWarnsMessage(RemovedInDjango50Warning, msg):
-            self.assertFormSetError(TestFormset.valid(), 0, "field", None)
-
     def _assert_formset_error_old_api_cases(
         self, formset, form_index, field, errors, msg_prefix
     ):