diff --git a/tests/test_plugin.py b/tests/test_plugin.py
index 78ce5d0..6fee1c3 100644
--- a/tests/test_plugin.py
+++ b/tests/test_plugin.py
@@ -87,6 +87,7 @@ def actual_written_file(run_redirect_test):
     ("foo.md", "foo/README.md#hash", "foo/index.html#hash", "./#hash"),
     ("foo.md", "the/fake.md#hash", "fake/destination/index.html#hash", "../fake/destination/#hash"),
     ("foo.md", "100%.md", "100%25.html", "../100%25/"),
+    ("foo/fizz/old.md",) + ("https://example.org/old.md",) * 3,
 ]