diff --git a/.github/workflows/check-links.yml b/.github/workflows/check-links.yml
index 14a3db9075..f07aa5b898 100644
--- a/.github/workflows/check-links.yml
+++ b/.github/workflows/check-links.yml
@@ -7,6 +7,7 @@ on:
       - "*.md"
     branches:
       - main
+      - 3.x
 
 # Remove default permissions of GITHUB_TOKEN for security
 # https://docs.github.com/en/actions/using-jobs/assigning-permissions-to-jobs
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f418e8f084..818fd6e27d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,12 +7,14 @@ on:
       - "*.md"
     branches:
       - main
+      - 3.x
   pull_request:
     paths-ignore:
       - "docs/**"
       - "*.md"
     branches:
       - main
+      - 3.x
       - "!v[0-9]*"
 
 # https://github.com/vitejs/vite/blob/main/.github/workflows/ci.yml
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 624cafa244..b6ce923d60 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -9,6 +9,7 @@ on:
     # autofix workflow will be triggered instead for PRs
     branches:
       - main
+      - 3.x
       - "!v[0-9]*"
 
 # Remove default permissions of GITHUB_TOKEN for security
diff --git a/.github/workflows/introspect.yml b/.github/workflows/introspect.yml
index 6b7f4fd586..0820e5407f 100644
--- a/.github/workflows/introspect.yml
+++ b/.github/workflows/introspect.yml
@@ -6,11 +6,13 @@ on:
       - ".github/workflows/**"
     branches:
       - main
+      - 3.x
   pull_request:
     paths:
       - ".github/workflows/**"
     branches:
       - main
+      - 3.x
       - "!v[0-9]*"
 
 permissions:
diff --git a/.github/workflows/label-pr.yml b/.github/workflows/label-pr.yml
index 9d462f9f8c..c173cee01d 100644
--- a/.github/workflows/label-pr.yml
+++ b/.github/workflows/label-pr.yml
@@ -6,6 +6,7 @@ on:
       - opened
     branches:
       - main
+      - 3.x
 
 jobs:
   add-pr-labels:
diff --git a/.github/workflows/scorecards.yml b/.github/workflows/scorecards.yml
index fb0b7dc233..ed941c8316 100644
--- a/.github/workflows/scorecards.yml
+++ b/.github/workflows/scorecards.yml
@@ -12,7 +12,7 @@ on:
   schedule:
     - cron: '20 7 * * 2'
   push:
-    branches: ["main"]
+    branches: ["main", "3.x"]
 
 # Declare default permissions as read only.
 permissions: read-all