diff --git a/litestar/app.py b/litestar/app.py
index e66a1c579b..dab53827bf 100644
--- a/litestar/app.py
+++ b/litestar/app.py
@@ -44,6 +44,7 @@
 )
 from litestar.plugins.base import CLIPlugin
 from litestar.router import Router
+from litestar.routes import ASGIRoute, HTTPRoute, WebSocketRoute
 from litestar.stores.registry import StoreRegistry
 from litestar.types import Empty, TypeDecodersSequence
 from litestar.types.internal_types import PathParameterDefinition, TemplateConfigType
diff --git a/tests/unit/test_static_files/test_static_files_validation.py b/tests/unit/test_static_files/test_static_files_validation.py
index 57ef6a4b59..bbe7ba90c9 100644
--- a/tests/unit/test_static_files/test_static_files_validation.py
+++ b/tests/unit/test_static_files/test_static_files_validation.py
@@ -1,4 +1,5 @@
 from pathlib import Path
+from typing import List
 
 import pytest
 
@@ -9,7 +10,8 @@
 from litestar.testing import create_test_client
 
 
-def test_validation_of_directories() -> None:
+@pytest.mark.parametrize("directories", [[], [""]])
+def test_validation_of_directories(directories: List[str]) -> None:
     with pytest.raises(ImproperlyConfiguredException):
         create_static_files_router(path="/static", directories=[])