diff --git a/tests/test_ivoa.py b/tests/test_ivoa.py
index 3d8c57f..6816e14 100644
--- a/tests/test_ivoa.py
+++ b/tests/test_ivoa.py
@@ -62,7 +62,7 @@ def test_construction(self):
             with self.assertRaises(ValueError):
                 Region.from_ivoa_pos(pos)
 
-    def _split_pos(self, pos: str) -> tuple[str, list[float]]:
+    def _split_pos(self, pos: str):
         """Split POS into type and floats."""
         region_type, *coordstr = pos.split()
         coordinates = [float(c) for c in coordstr]