diff --git a/django-stubs/db/backends/sqlite3/base.pyi b/django-stubs/db/backends/sqlite3/base.pyi
index 0cebb3a..bb5c7fb 100644
--- a/django-stubs/db/backends/sqlite3/base.pyi
+++ b/django-stubs/db/backends/sqlite3/base.pyi
@@ -26,6 +26,8 @@ class DatabaseWrapper(BaseDatabaseWrapper):
     introspection_class: Type[DatabaseIntrospection]
     ops_class: Type[DatabaseOperations]
 
+    def is_in_memory_db(self) -> bool: ...
+
 FORMAT_QMARK_REGEX: Any
 
 class SQLiteCursorWrapper(Database.Cursor): ...
diff --git a/django-stubs/db/backends/sqlite3/creation.pyi b/django-stubs/db/backends/sqlite3/creation.pyi
index 6d4657a..25ab122 100644
--- a/django-stubs/db/backends/sqlite3/creation.pyi
+++ b/django-stubs/db/backends/sqlite3/creation.pyi
@@ -1,5 +1,11 @@
+from os import PathLike
+from typing import Union
+
 from django.db.backends.base.creation import BaseDatabaseCreation
 from django.db.backends.sqlite3.base import DatabaseWrapper
 
 class DatabaseCreation(BaseDatabaseCreation):
     connection: DatabaseWrapper
+
+    @staticmethod
+    def is_in_memory_db(database_name: Union[str, PathLike[str]]) -> bool: ...