diff --git a/.github/scripts/unittest-windows/install.sh b/.github/scripts/unittest-windows/install.sh
index 676de7e830..0dd4997323 100644
--- a/.github/scripts/unittest-windows/install.sh
+++ b/.github/scripts/unittest-windows/install.sh
@@ -29,8 +29,7 @@ else
     cudatoolkit="pytorch-cuda=${version}"
 fi
 printf "Installing PyTorch with %s\n" "${cudatoolkit}"
-conda install -y -c "pytorch-${UPLOAD_CHANNEL}" -c nvidia pytorch "${cudatoolkit}"  pytest
-conda install -y -c conda-forge mkl=2020.4
+conda install -y -c "pytorch-${UPLOAD_CHANNEL}" -c nvidia pytorch "${cudatoolkit}"  pytest pybind11
 
 torch_cuda=$(python -c "import torch; print(torch.cuda.is_available())")
 echo torch.cuda.is_available is $torch_cuda