Ignore UserWarning for Ubuntu tests

jdaviz/configs/default/plugins/model_fitting/tests/test_fitting.py

@@ -7,6 +7,7 @@
 from astropy.modeling import models
 from astropy.nddata import StdDevUncertainty
 from astropy.tests.helper import assert_quantity_allclose
+from astropy.utils.exceptions import AstropyUserWarning
 from astropy.wcs import WCS
 from glue.core.roi import XRangeROI
 from numpy.testing import assert_allclose, assert_array_equal
@@ -390,7 +391,8 @@ def test_cube_fit_with_nans(cubeviz_helper):
     mf = cubeviz_helper.plugins["Model Fitting"]
     mf.cube_fit = True
     mf.create_model_component("Const1D")
-    mf.calculate_fit()
+    with pytest.warns(AstropyUserWarning, match='Model is linear in parameters'):
+        mf.calculate_fit()
     result = cubeviz_helper.app.data_collection['model']
     assert np.all(result.get_component("flux").data == 1)
 
@@ -410,7 +412,8 @@ def test_cube_fit_with_subset_and_nans(cubeviz_helper):
     mf.cube_fit = True
     mf.spectral_subset = 'Subset 1'
     mf.create_model_component("Const1D")
-    mf.calculate_fit()
+    with pytest.warns(AstropyUserWarning, match='Model is linear in parameters'):
+        mf.calculate_fit()
     result = cubeviz_helper.app.data_collection['model']
     print(cubeviz_helper.app.data_collection['model'].get_object(statistic=None).flux.max())
     assert np.all(result.get_component("flux").data == 1)