diff --git a/transport_data/tests/test_sum4all.py b/transport_data/tests/test_sum4all.py
new file mode 100644
index 0000000..bd255dc
--- /dev/null
+++ b/transport_data/tests/test_sum4all.py
@@ -0,0 +1,5 @@
+from transport_data.sum4all.structure import refresh
+
+
+def test_refresh() -> None:
+    refresh()