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
@@ -61,7 +61,7 @@ if host_machine.system() != 'windows'
 
   test('run_test_sh', find_program('run-test.sh'), timeout: 600, env: ['srcdir=@0@'.format(meson.current_source_dir()), 'builddir=@0@'.format(meson.current_build_dir()), 'EXEEXT=@0@'.format(conf.get('EXEEXT')), 'VERBOSE=1'])
 
-  if pytest.found()
+  if false
     test('pytest', pytest, args: ['--tap'],
          workdir: meson.current_source_dir(),
          env: ['builddir=@0@'.format(meson.current_build_dir())],