diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9405eaafdeb68ffd3053328c46a6b87cea567921..e965b95e42acce88f071c426fdc12598dec07911 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -76,6 +76,7 @@ jobs:
                 curl -L -O https://tiker.net/ci-support-v0
                 . ci-support-v0
                 build_py_project_in_conda_env
+                pip install pytest  # for advection.py
                 run_examples
 
     docs: