diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3f3d6379..e1bb5d44 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -43,6 +43,7 @@ jobs:
           auto-activate-base: false
           miniforge-version: latest
           use-mamba: true
+          conda-remove-defaults: "true"
 
       - name: Get Date
         id: get-date