diff --git a/.github/actions/install-project/action.yml b/.github/actions/install-project/action.yml
index 5f0ab406..d42a612d 100644
--- a/.github/actions/install-project/action.yml
+++ b/.github/actions/install-project/action.yml
@@ -4,8 +4,8 @@ inputs:
   python-version:
     required: true
     description: Python version to install
-  reference:
-    required: true
+  poetry-cache-id:
+    default: ${{ github.event.pull_request.id || github.event.after }}
     description: >
       Reference ID to use for defining poetry cache (e.g. pull request id
       or commit SHA)
@@ -19,7 +19,7 @@ runs:
       uses: actions/cache@v3
       with:
         path: ~/.local
-        key: ${{ runner.os }}-poetry-${{ inputs.reference }}
+        key: ${{ runner.os }}-poetry-${{ inputs.poetry-cache-id }}
     - name: Install Poetry
       uses: snok/install-poetry@v1
       if: steps.cached-poetry.outputs.cache-hit != 'true'
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index afc3f278..9d4ca831 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,7 +24,6 @@ jobs:
         uses: ./.github/actions/install-project
         with:
           python-version: '3.11'
-          reference: ${{ github.event.pull_request.id || github.event.after }}
 
       # run python style checks
       - name: Poetry Lock Check
@@ -50,7 +49,6 @@ jobs:
     - uses: ./.github/actions/install-project
       with:
         python-version: ${{ matrix.python-version }}
-        reference: ${{ github.event.pull_request.id || github.event.after }}
 
   test:
     runs-on: ubuntu-latest
@@ -67,7 +65,6 @@ jobs:
         uses: ./.github/actions/install-project
         with:
           python-version: ${{ matrix.python-version }}
-          reference: ${{ github.event.pull_request.id || github.event.after }}
 
       - name: Test with pytest
         env: