diff --git a/django/test/utils.py b/django/test/utils.py
index 9bb9257861e9..e69f3494825e 100644
--- a/django/test/utils.py
+++ b/django/test/utils.py
@@ -787,6 +787,17 @@ def disable(self):
 )
 
 
+requires_gil = skipUnless(
+    # sys._is_gil_enabled() is available on Python 3.13+, and only returns
+    # False on a free-threaded build with the GIL disabled. Assume the GIL is
+    # enabled otherwise.
+    getattr(sys, "_is_gil_enabled", lambda: True)(),
+    "This test relies on CPython's reference counting to free objects as soon "
+    "as they become unreachable, which isn't guaranteed on a free-threaded "
+    "build where the cyclic garbage collector may reclaim them instead.",
+)
+
+
 @contextmanager
 def extend_sys_path(*paths):
     """Context manager to temporarily add paths to sys.path."""
diff --git a/docs/ref/contrib/gis/gdal.txt b/docs/ref/contrib/gis/gdal.txt
index 44383b24a134..540140c32b8a 100644
--- a/docs/ref/contrib/gis/gdal.txt
+++ b/docs/ref/contrib/gis/gdal.txt
@@ -2091,9 +2091,9 @@ supported. You can use them by prepending the provided path with the
 appropriate ``/vsi*/`` prefix. See the `GDAL Virtual Filesystems
 documentation`_ for more details.
 
-.. warning:
+.. warning::
 
-    Rasters with names starting with `/vsi*/` will be treated as rasters from
+    Rasters with names starting with ``/vsi*/`` will be treated as rasters from
     the GDAL virtual filesystems. Django doesn't perform any extra validation.
 
 Compressed rasters
diff --git a/tests/backends/base/test_base.py b/tests/backends/base/test_base.py
index 2d19840851fb..e096802ff139 100644
--- a/tests/backends/base/test_base.py
+++ b/tests/backends/base/test_base.py
@@ -10,7 +10,7 @@
     skipUnlessDBFeature,
 )
 from django.test.runner import DebugSQLTextTestResult
-from django.test.utils import CaptureQueriesContext, override_settings
+from django.test.utils import CaptureQueriesContext, override_settings, requires_gil
 
 from ..models import Person, Square
 
@@ -62,6 +62,7 @@ def test_check_database_version_supported_with_none_as_database_version(self):
         with patch.object(connection.features, "minimum_database_version", None):
             connection.check_database_version_supported()
 
+    @requires_gil
     def test_release_memory_without_garbage_collection(self):
         # Schedule the restore of the garbage collection settings.
         self.addCleanup(gc.set_debug, 0)
diff --git a/tests/model_regress/test_state.py b/tests/model_regress/test_state.py
index 8abcc58382c5..fc1e1551f6ea 100644
--- a/tests/model_regress/test_state.py
+++ b/tests/model_regress/test_state.py
@@ -2,7 +2,7 @@
 
 from django.db.models.base import ModelState, ModelStateFieldsCacheDescriptor
 from django.test import SimpleTestCase
-from django.test.utils import garbage_collect
+from django.test.utils import garbage_collect, requires_gil
 
 from .models import Worker, WorkerProfile
 
@@ -11,6 +11,7 @@ class ModelStateTests(SimpleTestCase):
     def test_fields_cache_descriptor(self):
         self.assertIsInstance(ModelState.fields_cache, ModelStateFieldsCacheDescriptor)
 
+    @requires_gil
     def test_one_to_one_field_cycle_collection(self):
         self.addCleanup(gc.set_debug, gc.get_debug())
         gc.set_debug(gc.DEBUG_SAVEALL)
diff --git a/tests/select_related/tests.py b/tests/select_related/tests.py
index 97c146ed92c7..06faff4f4b40 100644
--- a/tests/select_related/tests.py
+++ b/tests/select_related/tests.py
@@ -3,7 +3,7 @@
 from django.core.exceptions import FieldError
 from django.db.models import FETCH_PEERS
 from django.test import SimpleTestCase, TestCase
-from django.test.utils import garbage_collect, ignore_warnings
+from django.test.utils import garbage_collect, ignore_warnings, requires_gil
 from django.utils.deprecation import RemovedInDjango70Warning
 
 from .models import (
@@ -62,15 +62,19 @@ def setUpTestData(cls):
         )
 
     def setup_gc_debug(self):
+        self.addCleanup(gc.garbage.clear)
         self.addCleanup(gc.set_debug, 0)
         self.addCleanup(gc.enable)
         gc.disable()
         garbage_collect()
         gc.set_debug(gc.DEBUG_SAVEALL)
 
-    def assert_no_memory_leaks(self):
+    def assert_no_local_function_leaks(self):
         garbage_collect()
-        self.assertEqual(gc.garbage, [])
+        local_functions_leaked = [
+            obj for obj in gc.garbage if "<locals>" in getattr(obj, "__qualname__", "")
+        ]
+        self.assertEqual(local_functions_leaked, [])
 
     def test_access_fks_without_select_related(self):
         """
@@ -157,10 +161,11 @@ def test_select_related_with_extra(self):
         )
         self.assertEqual(s.id + 10, s.a)
 
+    @requires_gil
     def test_select_related_memory_leak(self):
         self.setup_gc_debug()
         list(Species.objects.select_related("genus"))
-        self.assert_no_memory_leaks()
+        self.assert_no_local_function_leaks()
 
     def test_certain_fields(self):
         """