diff --git a/.github/workflows/core_tests.yml b/.github/workflows/core_tests.yml
index e2aa34a8b..f2f26ad85 100644
--- a/.github/workflows/core_tests.yml
+++ b/.github/workflows/core_tests.yml
@@ -37,6 +37,8 @@ jobs:
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
           pixi-version: "latest"
+      - name: Prepare pixi
+        run: pixi run install-ci
       - name: Test Ribasim Core
         run: |
           pixi run test-ribasim-core-cov