diff --git a/.github/workflows/humble-build-source.yml b/.github/workflows/humble-build-source.yml
index 4c419ef0..445e0d31 100644
--- a/.github/workflows/humble-build-source.yml
+++ b/.github/workflows/humble-build-source.yml
@@ -4,6 +4,11 @@ on:
   push:
     branches:
       - humble
+  pull_request:
+    branches:
+      - humble
+    paths:
+      - .github/workflows/humble-build-source.yml
   schedule:
     # Run every day to detect flakiness and broken dependencies
     - cron: '03 3 * * MON-FRI'
@@ -19,5 +24,4 @@ jobs:
     with:
       ros_distro: humble
       ref: humble
-      os_name: ubuntu-22.04
-      container: ""
+      container: ubuntu:22.04
diff --git a/.github/workflows/jazzy-build-source.yml b/.github/workflows/jazzy-build-source.yml
index f8498bac..0b8e599b 100644
--- a/.github/workflows/jazzy-build-source.yml
+++ b/.github/workflows/jazzy-build-source.yml
@@ -4,6 +4,11 @@ on:
   push:
     branches:
       - jazzy
+  pull_request:
+    branches:
+      - jazzy
+    paths:
+      - .github/workflows/jazzy-build-source.yml
   schedule:
     # Run every day to detect flakiness and broken dependencies
     - cron: '03 3 * * MON-FRI'
@@ -19,5 +24,4 @@ jobs:
     with:
       ros_distro: jazzy
       ref: jazzy
-      os_name: ubuntu-latest
       container: ubuntu:24.04
diff --git a/.github/workflows/rolling-build-source.yml b/.github/workflows/rolling-build-source.yml
index 8403ce08..4f1cbf87 100644
--- a/.github/workflows/rolling-build-source.yml
+++ b/.github/workflows/rolling-build-source.yml
@@ -4,6 +4,11 @@ on:
   push:
     branches:
       - ros2-master
+  pull_request:
+    branches:
+      - ros2-master
+    paths:
+      - .github/workflows/rolling-build-source.yml
   schedule:
     # Run every day to detect flakiness and broken dependencies
     - cron: '03 3 * * MON-FRI'
@@ -22,10 +27,8 @@ jobs:
         include:
         - ROS_DISTRO: rolling
           CONTAINER: ubuntu:24.04
-          OS_NAME: ubuntu-latest
         - ROS_DISTRO: kilted
           CONTAINER: ubuntu:24.04
-          OS_NAME: ubuntu-latest
     with:
       ros_distro: ${{ matrix.ROS_DISTRO }}
       ref: ros2-master