diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7c04ba9..6f6be0d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -12,6 +12,7 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.9', '3.10', '3.11', '3.12']
+        numpy-version: ['1', '2']
 
     steps:
     - uses: actions/checkout@v3
@@ -23,5 +24,14 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
+    - name: python version
+      env:
+        TOXENV: "py${{ matrix.python }}-numpy${{ matrix.numpy-version }}"
+      run: |
+        TOXENV=${{ env.TOXENV }}
+        TOXENV=${TOXENV//.} # replace all dots
+        echo TOXENV=${TOXENV} >> $GITHUB_ENV # update GitHub ENV vars
+    - name: print env
+      run: echo ${{ env.TOXENV }}
     - name: Test with tox
       run: tox