diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7e2a886..191e9ce 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -40,6 +40,7 @@ jobs:
       - name: configure conda and install code
         shell: bash -l {0}
         run: |
+          conda uninstall --force --yes piff
           python -m pip install -e . -vv
 
       - name: run cli