diff --git a/.azure-pipelines/warden.yml b/.azure-pipelines/warden.yml
index a7665661432..94cdd38df20 100644
--- a/.azure-pipelines/warden.yml
+++ b/.azure-pipelines/warden.yml
@@ -20,11 +20,14 @@ pr:
     include:
       - eng/packages/python-packages/doc-warden
 
+variables:
+- template: /eng/pipelines/templates/variables/globals.yml
+
 jobs:
 - job: 'Build'
 
   pool:
-    vmImage: 'ubuntu-16.04'  
+    vmImage: 'ubuntu-20.04'
 
   steps:
   - task: UsePythonVersion@0
@@ -72,7 +75,7 @@ jobs:
   dependsOn: 'Build'
 
   pool:
-    vmImage: 'ubuntu-16.04'  
+    vmImage: 'ubuntu-20.04'
 
   steps:
 
diff --git a/eng/pipelines/live-test-cleanup.yml b/eng/pipelines/live-test-cleanup.yml
index c8b26b6c8aa..325b741d1cd 100644
--- a/eng/pipelines/live-test-cleanup.yml
+++ b/eng/pipelines/live-test-cleanup.yml
@@ -10,7 +10,7 @@ stages:
   jobs:
   - job: Run
     pool:
-      vmImage: ubuntu-16.04
+      vmImage: ubuntu-20.04
 
     steps:
       # Register the dogfood environment to clean up ACS custom subscription
diff --git a/eng/pipelines/notifications.yml b/eng/pipelines/notifications.yml
index 5cb07e68712..0cc1f2b6fb0 100644
--- a/eng/pipelines/notifications.yml
+++ b/eng/pipelines/notifications.yml
@@ -29,7 +29,7 @@ stages:
           PathPrefix: 'cpp'
 
     pool:
-      vmImage: ubuntu-16.04
+      vmImage: ubuntu-20.04
 
     variables:
       Organization: azure-sdk