diff --git a/tests/dashboard/test_web_server.py b/tests/dashboard/test_web_server.py
index 2924e09f77..274cda3636 100644
--- a/tests/dashboard/test_web_server.py
+++ b/tests/dashboard/test_web_server.py
@@ -616,7 +616,7 @@ async def test_download_binary_handler_no_firmware_bin_path(
 
 @pytest.mark.asyncio
 @pytest.mark.usefixtures("mock_ext_storage_path")
-@pytest.mark.parametrize("file_value", ["", "  ", "%20"])
+@pytest.mark.parametrize("file_value", ["", "%20%20", "%20"])
 async def test_download_binary_handler_empty_file_name(
     dashboard: DashboardTestHelper,
     mock_storage_json: MagicMock,