[CI] Fix big GPU test marker

.github/workflows/nightly_tests.yml

@@ -248,7 +248,7 @@ jobs:
           BIG_GPU_MEMORY: 40
         run: |
           python -m pytest -n 1 --max-worker-restart=0 --dist=loadfile \
-            -m "big_gpu_with_torch_cuda" \
+            -m "big_accelerator" \
             --make-reports=tests_big_gpu_torch_cuda \
             --report-log=tests_big_gpu_torch_cuda.log \
             tests/

src/diffusers/utils/testing_utils.py

@@ -421,6 +421,10 @@ def require_big_accelerator(test_case):
     Decorator marking a test that requires a bigger hardware accelerator (24GB) for execution. Some example pipelines:
     Flux, SD3, Cog, etc.
     """
+    import pytest
+
+    test_case = pytest.mark.big_accelerator(test_case)
+
     if not is_torch_available():
         return unittest.skip("test requires PyTorch")(test_case)
 

tests/conftest.py

@@ -30,6 +30,10 @@
 warnings.simplefilter(action="ignore", category=FutureWarning)
 
 
+def pytest_configure(config):
+    config.addinivalue_line("markers", "big_accelerator: marks tests as requiring big accelerator resources")
+
+
 def pytest_addoption(parser):
     from diffusers.utils.testing_utils import pytest_addoption_shared