diff --git a/unittests/test_utilities.py b/unittests/test_utilities.py
new file mode 100644
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+++ b/unittests/test_utilities.py
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+#!/usr/bin/env python3
+# encoding: utf-8
+#
+# This file is a part of the CaosDB Project.
+#
+# Copyright (C) 2023 Alexander Schlemmer <alexander.schlemmer@ds.mpg.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+
+from caoscrawler.crawl import split_restricted_path
+
+
+
+def test_split_restricted_path():
+    assert split_restricted_path("") == []
+    assert split_restricted_path("/") == []
+    assert split_restricted_path("test/") == ["test"]
+    assert split_restricted_path("/test/") == ["test"]
+    assert split_restricted_path("test/bla") == ["bla", "test"]
+    assert split_restricted_path("/test/bla") == ["bla", "test"]
+    assert split_restricted_path("/test1/test2/bla") == ["bla", "test2", "test1"]
+    assert split_restricted_path("/test//bla") == ["bla", "test"]
+    assert split_restricted_path("//test/bla") == ["bla", "test"]
+    assert split_restricted_path("///test//bla////") == ["bla", "test"]