diff --git a/.github/workflows/ci-main-all.yaml b/.github/workflows/ci-main-all.yaml
index 34e88d7..3a3339b 100644
--- a/.github/workflows/ci-main-all.yaml
+++ b/.github/workflows/ci-main-all.yaml
@@ -16,6 +16,13 @@ defaults:
 jobs:
   tests:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - "3.11"
+          - "3.12"
+          - "3.13"
     steps:
       - name: Checkout openfe
         uses: actions/checkout@v6
@@ -37,6 +44,9 @@ jobs:
           cache-environment-key: environment-${{ steps.date.outputs.date }}
           cache-downloads-key: downloads-${{ steps.date.outputs.date }}
           init-shell: bash
+          create-args: >-
+            python=${{ matrix.python-version }}
+
   
       - name: "Install Ecosystem packages from @main"
         run: |