diff --git a/.github/workflows/build-system-check.yml b/.github/workflows/build-system-check.yml
index b197b1959..fe8cd5ed6 100644
--- a/.github/workflows/build-system-check.yml
+++ b/.github/workflows/build-system-check.yml
@@ -2,15 +2,17 @@ name: Build System Check
 
 on:
   push:
-   paths:
-   - 'Makefile'
-   - 'dependencies.Dockerfile'
-   - 'internal/tools/**'
+    branches:
+      - main
+    paths:
+      - 'Makefile'
+      - 'dependencies.Dockerfile'
+      - 'internal/tools/**'
   pull_request:
-   paths:
-   - 'Makefile'
-   - 'dependencies.Dockerfile'
-   - 'internal/tools/**'
+    paths:
+      - 'Makefile'
+      - 'dependencies.Dockerfile'
+      - 'internal/tools/**'
 
 jobs:
 
diff --git a/.github/workflows/changelog.yml b/.github/workflows/changelog.yml
index 41deb0046..69ae70e3f 100644
--- a/.github/workflows/changelog.yml
+++ b/.github/workflows/changelog.yml
@@ -24,8 +24,6 @@ jobs:
         !contains(github.event.pull_request.labels.*.name, 'Skip Changelog') &&
         !contains(github.event.pull_request.title, '[chore]')
       }}
-    env:
-      PR_HEAD: ${{ github.event.pull_request.head.sha }}
     steps:
       - name: Checkout Repo
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -46,7 +44,7 @@ jobs:
 
       - name: Ensure no changes to the CHANGELOG.md
         run: |
-          if [[ $(git diff --name-only $(git merge-base origin/main $PR_HEAD) $PR_HEAD ./CHANGELOG*.md) ]]
+          if [[ $(git diff --name-only origin/main HEAD ./CHANGELOG*.md) ]]
           then
           echo "CHANGELOG.md should not be directly modified."
             echo "Please add a .yaml file to the ./.chloggen/ directory."
@@ -59,7 +57,7 @@ jobs:
 
       - name: Ensure ./.chloggen/*.yaml addition(s)
         run: |
-          if [[ 1 -gt $(git diff --diff-filter=A --name-only $(git merge-base origin/main $PR_HEAD) $PR_HEAD ./.chloggen | grep -c \\.yaml) ]]
+          if [[ 1 -gt $(git diff --diff-filter=A --name-only origin/main HEAD ./.chloggen | grep -c \\.yaml) ]]
           then
             echo "No changelog entry was added to the ./.chloggen/ directory."
             echo "Please add a .yaml file to the ./.chloggen/ directory."
diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 35ed40436..e84c4e944 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -2,6 +2,8 @@ name: Checks
 
 on:
   push:
+    branches:
+      - main
   pull_request:
   merge_group:
 
diff --git a/.github/workflows/generate-registry-area-labels.yml b/.github/workflows/generate-registry-area-labels.yml
index d4f753706..6b646389b 100644
--- a/.github/workflows/generate-registry-area-labels.yml
+++ b/.github/workflows/generate-registry-area-labels.yml
@@ -1,7 +1,8 @@
 name: 'Generate registry area labels'
 on:
   push:
-    branches: [main]
+    branches:
+      - main
     paths:
       - model/**
       - ./.github/workflows/generate-registry-area-labels.yml