diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ce276b98ed5faba0d44695b4b5bf5fb8754821e1..b66a68c18451dbe47660c5c7d033e7c381a5bb37 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,17 +9,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
-      - run: python -m pip install --user --upgrade setuptools pybind11 pytest numpy scipy
+      - run: sudo apt update && sudo apt install -y python3-mpi4py
+      - run: python -m pip install --user --upgrade setuptools pybind11 pytest
       - run: python -m pip install --user .
       - run: python -m pytest python/test -x
-  test-intel:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-      - run: python -m pip install --user --upgrade setuptools pybind11 pytest scipy
-      - run: sudo apt update
-      # fix this version for now, because the current one has trouble installing
-      - run: |
-          CC=icx CXX=icpx python3 -m pip install --user .
-          python -m pytest python/test -x
diff --git a/pyproject.toml b/pyproject.toml
index c9a0e9ee13dee48077f03a41ee7226309e722c10..f09898b57b9be573c4d871673be624265cf0ebc2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,5 +2,5 @@
 requires-python = ">=3.7"
 
 [build-system]
-requires = ["setuptools >= 40.6.0", "pybind11 >= 2.6.0", "ducc0", "matplotlib", "h5py", "mpi4py", "python-casacore", "scipy", "nifty8"]
+requires = ["setuptools >= 40.6.0", "pybind11 >= 2.6.0", "ducc0", "matplotlib", "h5py", "python-casacore", "scipy", "nifty8"]
 build-backend = "setuptools.build_meta"