diff --git a/.github/workflows/python-ci.yaml b/.github/workflows/python-ci.yaml
index 009bdbb..cfc68ef 100644
--- a/.github/workflows/python-ci.yaml
+++ b/.github/workflows/python-ci.yaml
@@ -52,10 +52,8 @@ jobs:
 
       - name: Run tests
         run: |
-          source $HOME/micromamba/etc/profile.d/micromamba.sh
-          micromamba activate just-agents
-          which python
-          which pytest
-          pytest
+          $HOME/micromamba/micromamba run -n just-agents which python
+          $HOME/micromamba/micromamba run -n just-agents which pytest
+          $HOME/micromamba/micromamba run -n just-agents pytest
         env:
-          MAMBA_ROOT_PREFIX: $HOME/micromamba
+          MAMBA_ROOT_PREFIX: $HOME/micromamba
\ No newline at end of file