diff --git a/tests/__init__.py b/tests/__init__.py
index e3fbdfdbd7115d6d1b753e7f340380f48571db9e..98b8c22b7d673d59f255948f1022f87135263725 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,5 +2,5 @@ import pathlib
 
 TEST_DIR = pathlib.Path(__file__).parent
 
-def relpath(path):
-    return TEST_DIR / pathlib.Path(path)
+def relpath(*parts):
+    return TEST_DIR / pathlib.Path(*parts)