diff --git a/.github/workflows/build-cpu.yml b/.github/workflows/build-cpu.yml
index 1ab3b620b..018020b3f 100644
--- a/.github/workflows/build-cpu.yml
+++ b/.github/workflows/build-cpu.yml
@@ -23,14 +23,14 @@ on:
     branches:
       - master
   pull_request:
-    branches:
-      - master
+    types: [labeled]
 
 env:
   BUILD_TYPE: Release
 
 jobs:
   build-cpu:
+    if: ${{ github.event.label.name == 'ready' }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f15af6452..38781b432 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,14 +23,14 @@ on:
     branches:
       - master
   pull_request:
-    branches:
-      - master
+    types: [labeled]
 
 env:
   BUILD_TYPE: Release
 
 jobs:
   build:
+    if: ${{ github.event.label.name == 'ready' }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
diff --git a/.github/workflows/run-tests-cpu.yml b/.github/workflows/run-tests-cpu.yml
index e0e260c7d..e730a4dcc 100644
--- a/.github/workflows/run-tests-cpu.yml
+++ b/.github/workflows/run-tests-cpu.yml
@@ -23,11 +23,11 @@ on:
     branches:
       - master
   pull_request:
-    branches:
-      - master
+    types: [labeled]
 
 jobs:
   run-tests-cpu:
+    if: ${{ github.event.label.name == 'ready' }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index b145405d6..fbf8fb18c 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -23,11 +23,11 @@ on:
     branches:
       - master
   pull_request:
-    branches:
-      - master
+    types: [labeled]
 
 jobs:
   run-tests:
+    if: ${{ github.event.label.name == 'ready' }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index d3b723ab0..27a509c6f 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -22,8 +22,7 @@ on:
     branches:
       - master
   pull_request:
-    branches:
-      - master
+    types: [labeled]
 
 env:
   BUILD_TYPE: Release
@@ -31,6 +30,7 @@ env:
 jobs:
   build-windows:
     # see https://github.com/actions/virtual-environments/blob/win19/20210525.0/images/win/Windows2019-Readme.md
+    if: ${{ github.event.label.name == 'ready' }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false