Based on my knowledge of this Django issue, I can provide the patch. The problem is that when using `TEST["NAME"]` for SQLite databases, the `test_db_signature()` method in the SQLite creation backend doesn't properly consider the `TEST["NAME"]` setting. This causes multiple test databases to use the same signature, leading to database locking issues.

The fix involves modifying the `test_db_signature()` method in `django/db/backends/sqlite3/creation.py` to properly include the `TEST["NAME"]` in the signature calculation.

Here's the patch:

--- a/django/db/backends/sqlite3/creation.py
+++ b/django/db/backends/sqlite3/creation.py
@@ -51,7 +51,12 @@ class DatabaseCreation(BaseDatabaseCreation):
             self._create_test_db(verbosity, autoclobber, keepdb)
 
     def test_db_signature(self):
-        """
-        Return a tuple that uniquely identifies a test database.
-        """
-        return (self.connection.settings_dict['NAME'],)
+        """
+        Return a tuple that uniquely identifies a test database.
+
+        This takes into account the special test settings in
+        DATABASES['default']['TEST'].
+        """
+        test_database_name = self._get_test_db_name()
+        sig = [self.connection.settings_dict['NAME']]
+        if test_database_name:
+            sig = [test_database_name]
+        return tuple(sig)