diff --git a/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC5.yml b/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC5.yml
index 17d62bb69e..faf57e7dd5 100644
--- a/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC5.yml
+++ b/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC5.yml
@@ -11,8 +11,10 @@
 ##
 trigger:
   - master
+  - stable/*
 pr:
   - master
+  - stable/*
 jobs:
   - job: Platform_CI
     variables:
diff --git a/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS2019.yml b/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS2019.yml
index 2bfce4e0af..03ffb1a5a5 100644
--- a/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS2019.yml
+++ b/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS2019.yml
@@ -11,8 +11,10 @@
 ##
 trigger:
   - master
+  - stable/*
 pr:
   - master
+  - stable/*
 
 jobs:
   - job: Platform_CI