diff --git a/.github/workflows/arm64-arc-runner-set.yaml b/.github/workflows/arm64-arc-runner-set.yaml
index b938604f71..a43eac0aef 100644
--- a/.github/workflows/arm64-arc-runner-set.yaml
+++ b/.github/workflows/arm64-arc-runner-set.yaml
@@ -4,7 +4,6 @@ on:
   schedule:
   - cron: "0 17 * * 0" # 5pm UTC on Sundays
   workflow_dispatch: {}
-  pull_request:
 
 jobs:
   create-controller:
diff --git a/.github/workflows/build-test.yaml b/.github/workflows/build-test.yaml
index 0a6369d180..d33bed8343 100644
--- a/.github/workflows/build-test.yaml
+++ b/.github/workflows/build-test.yaml
@@ -258,7 +258,7 @@ jobs:
       fail-fast: true
       matrix:
         runner: [
-          # {name: ubuntu-20.04, arch: amd64},
+          {name: ubuntu-20.04, arch: amd64},
           {name: arc-runner-set, arch: arm64}
         ]
     runs-on: ${{ matrix.runner.name }}