Bug report

Travis is showing following errors

======================FAILURES===================================
______________________ test_bbox_inches_tight_raster[pdf] ______________________
[gw1] darwin -- Python 3.7.7 /usr/local/opt/python/bin/python3.7
expected = '/Users/travis/build/matplotlib/matplotlib/result_images/test_bbox_tight/bbox_inches_tight_raster-expected.pdf'
actual = PosixPath('/Users/travis/build/matplotlib/matplotlib/result_images/test_bbox_tight/bbox_inches_tight_raster.pdf')
tol = 0
def _raise_on_image_difference(expected, actual, tol):
tracebackhide = True
err = compare_images(expected, actual, tol, in_decorator=True)
if err:
for key in ["actual", "expected"]:
err[key] = os.path.relpath(err[key])
raise ImageComparisonFailure(
'images not close (RMS %(rms).3f):\n\t%(actual)s\n\t%(expected)s '
% err)
E matplotlib.testing.exceptions.ImageComparisonFailure: images not close (RMS 6.457):
E result_images/test_bbox_tight/bbox_inches_tight_raster_pdf.png
E result_images/test_bbox_tight/bbox_inches_tight_raster-expected_pdf.png

in #17028, #17030 etc.

Bug summary

The error is separate from work done in the prs. Maybe we need to change /bbox_inches_tight_raster-expected_pdf.png ?

Code for reproduction

Check travis build for above prs