https://buildd.debian.org/status/logs.php?pkg=gammapy&ver=0.19-1

...
=================================== FAILURES ===================================
gammapy/maps/wcs/tests/test_ndmap.py:836: AssertionError
gammapy/maps/wcs/tests/test_ndmap.py:847: AssertionError
=========================== short test summary info ============================
FAILED gammapy/maps/wcs/tests/test_ndmap.py::test_binary_erode - AssertionErr...
FAILED gammapy/maps/wcs/tests/test_ndmap.py::test_binary_dilate - AssertionEr...
===== 2 failed, 1030 passed, 562 skipped, 10 xfailed in 150.08s (0:02:30) ======
...

these bugs were fixed with the latest upload of gammapy, I just forgot
to mention them in the changelog.

Best

Ole



Accepted:

Format: 1.8
Date: Tue, 07 Jun 2022 11:00:20 +0200
Source: gammapy
Architecture: source
Version: 0.20-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Astro Team
<debian-astro-maintainers@lists.alioth.debian.org>
Changed-By: Ole Streicher <olebole@debian.org>
Changes:
  gammapy (0.20-1) unstable; urgency=medium
  .
    * New upstream version 0.20
    * Rediff patches
    * Add new build deps matplotlib and iminuit
    * Skip failing tests on 32-bit platforms
Checksums-Sha1:
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  9e52b62664cf277300ddf015536e22ee816f9205 3984483 gammapy_0.20.orig.tar.gz
  8932d06183117386d14d8535c57590389b4ff9c0 7628 gammapy_0.20-1.debian.tar.xz
Checksums-Sha256:
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gammapy_0.20-1.dsc
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  d79239386f8f0b78f999fd3b7b0bf8c1661eb42fe6e407534250b3c8f8f42da8 7628
gammapy_0.20-1.debian.tar.xz
Files:
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  1b5f3bb0a5c001bcf401dd5816ab625e 3984483 python optional
gammapy_0.20.orig.tar.gz
  e90d39918652283ab75970d55c417699 7628 python optional
gammapy_0.20-1.debian.tar.xz



Thank you for your contribution to Debian.