If pytest is found, it tries to use pytest-tap (which is currently unpackaged).

But as of fontconfig-2.16.0, this only runs test_issue431.py which needs
network access, so we can't run it anyway. Stub it out.
--- a/test/meson.build
+++ b/test/meson.build
@@ -95,7 +94,7 @@ else
                              'out.expected')
 endif
 
-if pytest.found()
+if false
   test('pytest', pytest, args: ['--tap'],
        workdir: meson.current_source_dir(),
        env: [