diff --git a/.github/workflows/coding-standards.yml b/.github/workflows/coding-standards.yml
index 08b39c9dcd4bd..f3f826eee51a8 100644
--- a/.github/workflows/coding-standards.yml
+++ b/.github/workflows/coding-standards.yml
@@ -44,14 +44,14 @@ jobs:
   # Runs the JavaScript coding standards checks.
   jshint:
     name: JavaScript coding standards
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-coding-standards-javascript.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-coding-standards-javascript.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -67,7 +67,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ jshint, slack-notifications ]
diff --git a/.github/workflows/javascript-tests.yml b/.github/workflows/javascript-tests.yml
index d3899a2839fcb..0be9d6cd7207e 100644
--- a/.github/workflows/javascript-tests.yml
+++ b/.github/workflows/javascript-tests.yml
@@ -42,7 +42,7 @@ jobs:
   # Runs the WordPress Core JavaScript tests.
   test-js:
     name: QUnit Tests
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-javascript-tests.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-javascript-tests.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
@@ -51,7 +51,7 @@ jobs:
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -67,7 +67,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ slack-notifications ]
diff --git a/.github/workflows/phpunit-tests.yml b/.github/workflows/phpunit-tests.yml
index 8331275abc756..e3d9d2f4c5de6 100644
--- a/.github/workflows/phpunit-tests.yml
+++ b/.github/workflows/phpunit-tests.yml
@@ -33,7 +33,7 @@ jobs:
   #
   test-php:
     name: PHP ${{ matrix.php }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-phpunit-tests-v1.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-phpunit-tests-v1.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     secrets: inherit
@@ -41,7 +41,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest ]
+        os: [ ubuntu-26.04 ]
         php: [ '5.3' ]
         split_slow: [ false, true ]
         multisite: [ false, true ]
@@ -51,57 +51,57 @@ jobs:
           # Additional "slow" jobs for PHP 5.6.
           - php: '5.6'
             phpunit: '4-php-5.6'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: false
             split_slow: true
           - php: '5.6'
             phpunit: '4-php-5.6'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: true
             split_slow: true
           # Include job for specific PHPUnit versions.
           - php: '7.1'
             phpunit: '6-php-7.1'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: false
             split_slow: false
           - php: '7.1'
             phpunit: '6-php-7.1'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: true
             split_slow: false
           - php: '7.0'
             phpunit: '6-php-7.0'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: false
             split_slow: false
           - php: '7.0'
             phpunit: '6-php-7.0'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: true
             split_slow: false
           - php: '5.6'
             phpunit: '4-php-5.6'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: false
             split_slow: false
           - php: '5.6'
             phpunit: '4-php-5.6'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: false
             multisite: true
             split_slow: false
           # Include job for PHP 7.1 with memcached.
           - php: '7.1'
             phpunit: '6-php-7.1'
-            os: ubuntu-latest
+            os: ubuntu-26.04
             memcached: true
             multisite: false
             split_slow: false
@@ -117,7 +117,7 @@ jobs:
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -133,7 +133,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ test-php, slack-notifications ]
diff --git a/.github/workflows/test-build-processes.yml b/.github/workflows/test-build-processes.yml
index f514614647bbd..3fe6bf445bd1a 100644
--- a/.github/workflows/test-build-processes.yml
+++ b/.github/workflows/test-build-processes.yml
@@ -38,18 +38,18 @@ jobs:
   # Tests the WordPress Core build process on multiple operating systems.
   test-core-build-process:
     name: Core running from ${{ matrix.directory }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest, windows-latest ]
+        os: [ ubuntu-26.04, windows-latest ]
         directory: [ 'build' ]
         include:
           # Only prepare artifacts once.
-          - os: ubuntu-latest
+          - os: ubuntu-26.04
             directory: 'build'
             prepare-playground: true
     with:
@@ -68,7 +68,7 @@ jobs:
   # See https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability.
   test-core-build-process-macos:
     name: Core running from ${{ matrix.directory }}
-    uses: WordPress/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/reusable-test-core-build-process.yml@update-runners-ubuntu-26.04
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' }}
@@ -84,7 +84,7 @@ jobs:
 
   slack-notifications:
     name: Slack Notifications
-    uses: WordPress/wordpress-develop/.github/workflows/slack-notifications.yml@trunk
+    uses: desrosj/wordpress-develop/.github/workflows/slack-notifications.yml@update-runners-ubuntu-26.04
     permissions:
       actions: read
       contents: read
@@ -100,7 +100,7 @@ jobs:
 
   failed-workflow:
     name: Failed workflow tasks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     permissions:
       actions: write
     needs: [ slack-notifications ]