[1.5.x] Fixed #19546 - ensure that deprecation warnings are shown during tests

refs #18985

1 files changed, 13 insertions, 0 deletions

diff --git a/django/test/simple.py b/django/test/simple.py
index bf0219d53f..8faf1e4f93 100644
--- a/django/test/simple.py
+++ b/django/test/simple.py
@@ -1,3 +1,4 @@
+import logging
 import unittest as real_unittest
 
 from django.conf import settings
@@ -365,7 +366,19 @@ class DjangoTestSuiteRunner(object):
         self.setup_test_environment()
         suite = self.build_suite(test_labels, extra_tests)
         old_config = self.setup_databases()
+        if self.verbosity > 0:
+            # ensure that deprecation warnings are displayed during testing
+            # the following state is assumed:
+            # logging.capturewarnings is true
+            # a "default" level warnings filter has been added for
+            # DeprecationWarning. See django.conf.LazySettings._configure_logging
+            logger = logging.getLogger('py.warnings')
+            handler = logging.StreamHandler()
+            logger.addHandler(handler)
         result = self.run_suite(suite)
+        if self.verbosity > 0:
+            # remove the testing-specific handler
+            logger.removeHandler(handler)
         self.teardown_databases(old_config)
         self.teardown_test_environment()
         return self.suite_result(suite, result)