diff --git a/tests/test_data_metadata.py b/tests/test_data_metadata.py
index acc5e6d..6fd0af9 100644
--- a/tests/test_data_metadata.py
+++ b/tests/test_data_metadata.py
@@ -39,6 +39,8 @@ def test_metadata_transforms_source():
 @pytest.mark.parametrize('value', [
     '',
     'link',
+    '  link',
+    'link  ',
     'link1  link2',
     ' link1  link2   link3    ',
 ])