Advanced deprecation warnings for Django 3.0.

django/utils/deprecation.py

@@ -2,15 +2,15 @@ import inspect
 import warnings
 
 
-class RemovedInDjango30Warning(DeprecationWarning):
+class RemovedInDjango31Warning(DeprecationWarning):
     pass
 
 
-class RemovedInDjango31Warning(PendingDeprecationWarning):
+class RemovedInDjango40Warning(PendingDeprecationWarning):
     pass
 
 
-RemovedInNextVersionWarning = RemovedInDjango30Warning
+RemovedInNextVersionWarning = RemovedInDjango31Warning
 
 
 class warn_about_renamed_method:

docs/internals/deprecation.txt

@@ -7,6 +7,14 @@ in a backward incompatible way, following their deprecation, as per the
 :ref:`deprecation policy <internal-release-deprecation-policy>`. More details
 about each item can often be found in the release notes of two versions prior.
 
+.. _deprecation-removed-in-4.0:
+
+4.0
+---
+
+See the :ref:`Django 3.0 release notes <deprecated-features-3.0>` for more
+details on these changes.
+
 .. _deprecation-removed-in-3.1:
 
 3.1

tests/runtests.py

@@ -19,7 +19,7 @@ from django.test.runner import default_test_processes
 from django.test.selenium import SeleniumTestCaseBase
 from django.test.utils import get_runner
 from django.utils.deprecation import (
-    RemovedInDjango30Warning, RemovedInDjango31Warning,
+    RemovedInDjango31Warning, RemovedInDjango40Warning,
 )
 from django.utils.log import DEFAULT_LOGGING
 
@@ -32,7 +32,7 @@ else:
     warnings.filterwarnings('ignore', r'\(1003, *', category=MySQLdb.Warning)
 
 # Make deprecation warnings errors to ensure no usage of deprecated features.
-warnings.simplefilter("error", RemovedInDjango30Warning)
+warnings.simplefilter("error", RemovedInDjango40Warning)
 warnings.simplefilter('error', RemovedInDjango31Warning)
 # Make runtime warning errors to ensure no usage of error prone patterns.
 warnings.simplefilter("error", RuntimeWarning)