diff --git a/.github/workflows/regression-tests.yml b/.github/workflows/regression-tests.yml
index 23fb365..436a280 100644
--- a/.github/workflows/regression-tests.yml
+++ b/.github/workflows/regression-tests.yml
@@ -50,6 +50,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install jupyter-book
+        pip install .
     - name: Assemble the tutorials to a jupyter book and build htlm pages
       run: |
         jupyter-book build ./doc/tutorials