TEST: Try using clear_and_catch_warnings

Author: effigies

nibabel/tests/test_nifti1.py

@@ -1131,7 +1131,7 @@ def test_zooms_edge_cases(self):
 
 
         # Unknown units = 2 warnings
-        with warnings.catch_warnings(record=True) as warns:
+        with clear_and_catch_warnings() as warns:
             warnings.simplefilter('always')
             assert_array_almost_equal(img.header.get_zooms(units='canonical'),
                                       (1, 1, 1, 1))
@@ -1140,7 +1140,7 @@ def test_zooms_edge_cases(self):
                       units='canonical', raise_unknown=True)
 
         img.header.set_xyzt_units(xyz='meter')
-        with warnings.catch_warnings(record=True) as warns:
+        with clear_and_catch_warnings() as warns:
             warnings.simplefilter('always')
             assert_array_almost_equal(img.header.get_zooms(units='canonical'),
                                       (1000, 1000, 1000, 1))
@@ -1156,7 +1156,7 @@ def test_zooms_edge_cases(self):
                                   (0.001, 0.001, 0.001, 1))
 
         img.header.set_xyzt_units(t='sec')
-        with warnings.catch_warnings(record=True) as warns:
+        with clear_and_catch_warnings() as warns:
             warnings.simplefilter('always')
             assert_array_equal(img.header.get_zooms(units='canonical'),
                                (1, 1, 1, 1))