Update nibabel/tests/test_minc2.py

Co-authored-by: Chris Markiewicz <[email protected]>

Author: DimitriPapadopoulos

nibabel/tests/test_minc2.py

@@ -129,5 +129,5 @@ def test_bad_diminfo():
     # File has a bad spacing field 'xspace' when it should be
     # `irregular`, `regular__` or absent (default to regular__).
     # We interpret an invalid spacing as absent, but warn.
-    with pytest.warns(UserWarning) as _:
+    with pytest.warns(UserWarning):
         Minc2Image.from_filename(fname)