diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index bbbc1eb..b08e57e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -43,6 +43,7 @@ jobs:
 
       - name: Install dependencies with Poetry
         run: |
+          poetry env remove --all
           poetry install --with test --all-extras
           poetry add git+https://github.com/AstarVienna/ScopeSim_Data.git