diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index acb62f926..29e4944ff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,7 +65,7 @@ jobs:
                       **/requirements*.txt
 
             - name: Install package test dependencies
-              run: pip install -e .[dev]
+              run: pip install -e .[dev,optimade]
 
             - name: Set jupyter token env
               run: echo "JUPYTER_TOKEN=$(openssl rand -hex 32)" >> $GITHUB_ENV
@@ -133,7 +133,7 @@ jobs:
                       **/requirements*.txt
 
             - name: Install package
-              run: pip install -e .[dev,smiles]
+              run: pip install -e .[dev,smiles,optimade]
 
             - name: Run pytest
               run: pytest -v tests --cov