diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 3c1e99f0..d7b5cd5f 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -1,6 +1,6 @@
 name: Build unstable
 
-on: [ push ]
+on: [ push, pull_request ]
 
 concurrency:
   group: unstable
@@ -52,4 +52,4 @@ jobs:
           playwright install chromium firefox
           pytest --cov=streamlit_pdf_viewer --cov-report xml
       - name: Coveralls
-        uses: coverallsapp/github-action@v2
\ No newline at end of file
+        uses: coverallsapp/github-action@v2