diff --git a/.github/workflows/basic-tests.yml b/.github/workflows/basic-tests.yml
index d55305c05a9..26640e767bf 100644
--- a/.github/workflows/basic-tests.yml
+++ b/.github/workflows/basic-tests.yml
@@ -23,7 +23,8 @@ jobs:
     - uses: actions/checkout@v4
     - name: installing system packages
       run: |
-        conda install fftw mpi git-lfs graphviz gsl openssl openmpi "tox<4.0.0" pip setuptools
+        conda install fftw mpi git-lfs graphviz gsl openssl openmpi pip setuptools
+        conda install -c conda-forge "tox<4.0.0"
     - name: installing macosx packages
       if: matrix.os == 'macos-latest'
       run: |