diff --git a/django/db/backends/base/creation.py b/django/db/backends/base/creation.py
index 7c11465f943e..ed2b0738a5a1 100644
--- a/django/db/backends/base/creation.py
+++ b/django/db/backends/base/creation.py
@@ -22,6 +22,12 @@ class BaseDatabaseCreation:
     destruction of the test database.
     """
 
+    # If this backend's destroy_test_db() closes the database connection, this
+    # attribute must be set to the name of the connection closing method (e.g.
+    # "close" on Oracle, "close_pool" on MongoDB) to avoid failures in some
+    # backends tests.
+    destroy_test_db_connection_close_method = None
+
     def __init__(self, connection):
         self.connection = connection
 
diff --git a/django/db/backends/oracle/creation.py b/django/db/backends/oracle/creation.py
index efbec14d6eee..d36177b7e143 100644
--- a/django/db/backends/oracle/creation.py
+++ b/django/db/backends/oracle/creation.py
@@ -10,6 +10,8 @@
 
 
 class DatabaseCreation(BaseDatabaseCreation):
+    destroy_test_db_connection_close_method = "close"
+
     @cached_property
     def _maindb_connection(self):
         """
diff --git a/tests/backends/base/test_creation.py b/tests/backends/base/test_creation.py
index 202d8e1b40d5..2542407f0bc4 100644
--- a/tests/backends/base/test_creation.py
+++ b/tests/backends/base/test_creation.py
@@ -67,6 +67,13 @@ def test_custom_test_name_with_test_prefix(self):
 class TestDbCreationTests(SimpleTestCase):
     available_apps = ["backends.base.app_unmigrated"]
 
+    @staticmethod
+    def patch_close_connection(creation):
+        # If DatabaseCreation.destroy_test_db() closes the database connection,
+        # that behavior must be disabled to prevent each test from crashing.
+        if close_method_name := creation.destroy_test_db_connection_close_method:
+            setattr(creation.connection, close_method_name, mock.Mock())
+
     @mock.patch("django.db.migrations.executor.MigrationExecutor.migrate")
     def test_migrate_test_setting_false(
         self, mocked_migrate, mocked_sync_apps, *mocked_objects
@@ -74,9 +81,7 @@ def test_migrate_test_setting_false(
         test_connection = get_connection_copy()
         test_connection.settings_dict["TEST"]["MIGRATE"] = False
         creation = test_connection.creation_class(test_connection)
-        if connection.vendor == "oracle":
-            # Don't close connection on Oracle.
-            creation.connection.close = mock.Mock()
+        self.patch_close_connection(creation)
         old_database_name = test_connection.settings_dict["NAME"]
         try:
             with mock.patch.object(creation, "_create_test_db"):
@@ -104,9 +109,7 @@ def test_migrate_test_setting_false_ensure_schema(
         test_connection = get_connection_copy()
         test_connection.settings_dict["TEST"]["MIGRATE"] = False
         creation = test_connection.creation_class(test_connection)
-        if connection.vendor == "oracle":
-            # Don't close connection on Oracle.
-            creation.connection.close = mock.Mock()
+        self.patch_close_connection(creation)
         old_database_name = test_connection.settings_dict["NAME"]
         try:
             with mock.patch.object(creation, "_create_test_db"):
@@ -128,9 +131,7 @@ def test_migrate_test_setting_true(
         test_connection = get_connection_copy()
         test_connection.settings_dict["TEST"]["MIGRATE"] = True
         creation = test_connection.creation_class(test_connection)
-        if connection.vendor == "oracle":
-            # Don't close connection on Oracle.
-            creation.connection.close = mock.Mock()
+        self.patch_close_connection(creation)
         old_database_name = test_connection.settings_dict["NAME"]
         try:
             with mock.patch.object(creation, "_create_test_db"):
@@ -158,9 +159,7 @@ def test_mark_expected_failures_and_skips_call(
         """
         test_connection = get_connection_copy()
         creation = test_connection.creation_class(test_connection)
-        if connection.vendor == "oracle":
-            # Don't close connection on Oracle.
-            creation.connection.close = mock.Mock()
+        self.patch_close_connection(creation)
         old_database_name = test_connection.settings_dict["NAME"]
         try:
             with mock.patch.object(creation, "_create_test_db"):
@@ -175,9 +174,7 @@ def test_mark_expected_failures_and_skips_call(
     def test_serialize_deprecation(self, serialize_db_to_string, *mocked_objects):
         test_connection = get_connection_copy()
         creation = test_connection.creation_class(test_connection)
-        if connection.vendor == "oracle":
-            # Don't close connection on Oracle.
-            creation.connection.close = mock.Mock()
+        self.patch_close_connection(creation)
         old_database_name = test_connection.settings_dict["NAME"]
         msg = (
             "DatabaseCreation.create_test_db(serialize) is deprecated. Call "