diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7b56e730..3da9ecda 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Setup Graphviz
         uses: ts-graphviz/setup-graphviz@v2
       - name: Install poetry
-        run: curl -sSL https://install.python-poetry.org | python3 -
+        run: curl -sSL https://install.python-poetry.org | python3 - --version 2.2.1
       - name: Run all tests
         run: |
           poetry install