diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 526a267..8607863 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -35,9 +35,14 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
 
+      - name: Echo workspace
+        run: |
+          echo $GITHUB_WORKSPACE
+          echo ${{ github_workspace }}
+
       - name: Upgrade pip
         run: |
-          pip install --constraint=.github/workflows/constraints.txt pip
+          pip install --constraint=${{ github_workspace }}/.github/workflows/constraints.txt pip
           pip --version
 
       - name: Upgrade pip in virtual environments
@@ -51,13 +56,13 @@ jobs:
 
       - name: Install Poetry
         run: |
-          pipx install --pip-args=--constraint=.github/workflows/constraints.txt poetry
+          pipx install --pip-args=--constraint=${{ github_workspace }}/.github/workflows/constraints.txt poetry
           poetry --version
 
       - name: Install Nox
         run: |
-          pipx install --pip-args=--constraint=.github/workflows/constraints.txt nox
-          pipx inject --pip-args=--constraint=.github/workflows/constraints.txt nox nox-poetry
+          pipx install --pip-args=--constraint=${{ github_workspace }}/.github/workflows/constraints.txt nox
+          pipx inject --pip-args=--constraint=${{ github_workspace }}/.github/workflows/constraints.txt nox nox-poetry
           nox --version
 
       - name: Compute pre-commit cache key
@@ -116,18 +121,18 @@ jobs:
 
       - name: Upgrade pip
         run: |
-          pip install --constraint=.github/workflows/constraints.txt pip
+          pip install --constraint=${{ github_workspace }}/.github/workflows/constraints.txt pip
           pip --version
 
       - name: Install Poetry
         run: |
-          pipx install --pip-args=--constraint=.github/workflows/constraints.txt poetry
+          pipx install --pip-args=--constraint=${{ github_workspace }}/.github/workflows/constraints.txt poetry
           poetry --version
 
       - name: Install Nox
         run: |
-          pipx install --pip-args=--constraint=.github/workflows/constraints.txt nox
-          pipx inject --pip-args=--constraint=.github/workflows/constraints.txt nox nox-poetry
+          pipx install --pip-args=--constraint=${{ github_workspace }}/.github/workflows/constraints.txt nox
+          pipx inject --pip-args=--constraint=${{ github_workspace }}/.github/workflows/constraints.txt nox nox-poetry
           nox --version
 
       - name: Download coverage data