diff --git a/.github/workflows/continuous-integration-pip.yml b/.github/workflows/continuous-integration-pip.yml
index 7687629ff..94a4b0f07 100644
--- a/.github/workflows/continuous-integration-pip.yml
+++ b/.github/workflows/continuous-integration-pip.yml
@@ -1,5 +1,5 @@
 name: CI (pip)
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build:
@@ -14,6 +14,10 @@ jobs:
         uses: actions/setup-python@v1
         with:
           python-version: ${{ matrix.python-version }}
+      - name: install pandoc
+        uses: r-lib/actions/setup-pandoc@v1
+        with:
+          pandoc-version: '2.10'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip