diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index ec054f86c771..e20ba439d5dc 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -1,6 +1,5 @@
 name: Unit Tests
 on:
-  pull_request:
   push:
     branches:
       - main
@@ -31,7 +30,7 @@ jobs:
             experimental: true
             continue-on-error: true
     name: unittest / ${{ matrix.toxenv }} / python ${{matrix.python-version}}
-    runs-on: ubuntu-20.04
+    runs-on: macos-latest
     continue-on-error: ${{ matrix.experimental }}
     steps:
       - name: "Checkout"