[ci] xfail more incorrect transformer imports.

[sayakpaul]

What does this PR do?

Hopefully, the last ones.

[dg845]

Perhaps I am missing something, but it appears that this test (and test_download_safetensors_variant_does_not_exist_for_model below) are still marked as failed rather than xfailed in the CI:

FAILED tests/pipelines/test_pipelines.py::DownloadTests::test_download_safetensors_only_variant_exists_for_model
FAILED tests/pipelines/test_pipelines.py::DownloadTests::test_download_safetensors_variant_does_not_exist_for_model

Is this expected?

[sayakpaul]

Yeah this is not expected and seeing for the first time. Let me check.

[dg845]

It looks like the following tests are still failing on the CI:

• tests/pipelines/test_pipelines.py::DownloadTests::test_download_bin_only_variant_exists_for_model
• tests/pipelines/test_pipelines.py::DownloadTests::test_download_bin_variant_does_not_exist_for_model

These tests also previously failed on the (unrelated) PR #12463, see #12463 (comment). So probably these tests should also be xfail-ed?

[sayakpaul]

Hmm, I am not sure why the Transformers version is showing up to 4.57.0-dev here: https://github.com/huggingface/diffusers/actions/runs/18487464650/job/52673652920?pr=12455#step:5:19 whereas it should have been 5.0.0-dev. My plate is a little full at the moment to dive deeper into it.

So, I have made the xfail non-strict, which should hopefully unblock us. But I am open to other suggestions.

To double-check, I tried to replicate the exact same CI environment:

1. docker run -it diffusers/diffusers-pytorch-cpu
2. Clone diffusers and cd into it.
3. Check out this PR branch.
4. Then run these:
   

   diffusers/.github/workflows/pr_tests.yml

   Lines 117 to 120 in fa468c5

   	uv pip install -e ".[quality]"
   	uv pip uninstall transformers huggingface_hub && uv pip install --prerelease allow -U transformers@git+https://github.com/huggingface/transformers.git
   	uv pip uninstall accelerate && uv pip install -U accelerate@git+https://github.com/huggingface/accelerate.git --no-deps

5. Then run pytest <corresponding_test>.

[dg845]

LGTM! I think test_download_bin_only_variant_exists_for_model should also be marked as xfail for now, as it fails with the CLIPFeatureExtractor/CLIPImageProcessor issue in the CI:

 FAILED tests/pipelines/test_pipelines.py::DownloadTests::test_download_bin_only_variant_exists_for_model - AttributeError: module transformers has no attribute CLIPFeatureExtractor