diff --git a/.github/workflows/CI_conda_forge.yml b/.github/workflows/CI_conda_forge.yml
index 52407c58..a3ed26a7 100644
--- a/.github/workflows/CI_conda_forge.yml
+++ b/.github/workflows/CI_conda_forge.yml
@@ -54,5 +54,6 @@ jobs:
         if: ${{ !matrix.use-mamba }}
       - name: "Run tests"
         run: |
+          conda activate pysr-test
           pip install pytest nbval
           python -m pysr test main,startup