diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c6fbbdd..e1d7da3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -4,6 +4,7 @@ on:
   push:
     branches: [main, master]
   pull_request:
+    branches: [main, master]
 
 jobs:
   tests:
@@ -27,6 +28,7 @@ jobs:
           - { python: "3.12", os: "ubuntu-latest", session: "docs-build" }
     services:
       postgres:
+        if: matrix.os == "ubuntu-latest"
         image: postgres:15
         env:
           POSTGRES_PASSWORD: postgres