diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 61c837d..cd4b6d2 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -20,7 +20,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install coveralls
+        python -m pip install coveralls poetry
         make install
     - name: Code formatting
       run: make code-format