test_binary_diff() fails

I am running tests at my machine and test_binary_diff() fails with following error:

repo = pygit2.Repository('/tmp/pytest/test_binary_diff0/binaryfilerepo/.git/')

    def test_binary_diff(repo):
        diff = repo.diff('HEAD', 'HEAD^')
        assert PATCH_BINARY == diff.patch
        diff = repo.diff('HEAD', 'HEAD^', flags=DiffOption.SHOW_BINARY)
>       assert PATCH_BINARY_SHOW == diff.patch
E       AssertionError: assert 'diff --git a...vrst3ey5{\n\n' == 'diff --git a...vrst3ey5{\n\n'
E         Skipping 154 identical leading characters in diff, use -v to show
E           teral 8
E         - PcwS>j%FIhFs^kIy3n&7R
E         ?   ^^^^
E         + Pc${NM%FIhFs^kIy3n&7R
E         ?   ^^^^
E           ...

まず test_binary_diff() を実行し、生成された SHOW_BINARY diff を PATCH_BINARY_SHOW と比較します。Assertion に表示される異なるバイナリ内容に注目してください。リポジトリの diff 呼び出しと、そのバイナリ出力の動作を追跡します。テストが期待される安定したパッチ出力を生成すれば作業は完了です。