Pass mpi environment variable to tox

Author: edknv

tox.ini

@@ -16,6 +16,8 @@ allowlist_externals =
     bash
 deps =
     --no-deps -rrequirements/test.txt
+passenv =
+    OPAL_PREFIX
 setenv =
     TF_GPU_ALLOCATOR=cuda_malloc_async
 sitepackages=true
@@ -24,7 +26,7 @@ commands =
     python -m pip install --upgrade git+https://github.com/NVIDIA-Merlin/dataloader.git@{env:MERLIN_BRANCH:main}
     python -m pip install --upgrade git+https://github.com/NVIDIA-Merlin/nvtabular.git@{env:MERLIN_BRANCH:main}
     python -m pip install --upgrade git+https://github.com/NVIDIA-Merlin/systems.git@{env:MERLIN_BRANCH:main}
-    bash -c 'python -m pytest --cov-report term --cov merlin -m "{env:PYTEST_MARKERS}" -rxs tests || ([ $? = 5 ] && exit 0 || exit $?)'
+    bash -c 'python -m pytest --cov-report term --cov merlin -m "{env:PYTEST_MARKERS}" -rxs tests/ || ([ $? = 5 ] && exit 0 || exit $?)'
 
 [testenv:py38-multi-gpu]
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