Fix warnings during integration tests

[johannaengland]

Closes #2847.

I was not able to reproduce

tests/integration/watchdog_test.py::test_get_status_cache_does_not_raise
  /source/.tox/integration-py310-django32/lib/python3.10/site-packages/django/core/cache/backends/filebased.py:36: RuntimeWarning: Pickled model instance's Django version 3.2.23 does not match the current version 3.2.24.
    return pickle.loads(zlib.decompress(f.read()))

[hmpf]

(Pickle-versions) there's a reason we want to stop using pickle everywhere :)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.69%. Comparing base (9cfd877) to head (6e41330).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2858   +/-   ##
=======================================
  Coverage   56.69%   56.69%           
=======================================
  Files         602      602           
  Lines       43971    43971           
=======================================
  Hits        24931    24931           
  Misses      19040    19040           

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[hmpf]

Looks fine to me but @lunkwill42 needs to okay it , and see my question.

[github-actions]

Test results

     12 files       12 suites   11m 39s ⏱️
3 320 tests 3 320 ✔️ 0 💤 0 ❌
9 435 runs  9 435 ✔️ 0 💤 0 ❌

Results for commit 6e41330.

♻️ This comment has been updated with latest results.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud