diff --git a/.azurepipelines/Ubuntu-GCC.yml b/.azurepipelines/Ubuntu-GCC.yml
index 2d359ba10d..987dc3f10f 100644
--- a/.azurepipelines/Ubuntu-GCC.yml
+++ b/.azurepipelines/Ubuntu-GCC.yml
@@ -28,7 +28,7 @@ jobs:
 - template: templates/pr-gate-build-job.yml
   parameters:
     tool_chain_tag: GCC
-    vm_image: 'ubuntu-24.04'
+    vm_image: ${{ variables.default_linux_vm }}
     container: ${{ variables.default_linux_image }}
     arch_list: "IA32,X64,AARCH64,RISCV64,LOONGARCH64"
     usePythonVersion: ''  # use Python from the container image
diff --git a/.azurepipelines/Windows-VS.yml b/.azurepipelines/Windows-VS.yml
index 2b5abe2bc7..86d4bff5f9 100644
--- a/.azurepipelines/Windows-VS.yml
+++ b/.azurepipelines/Windows-VS.yml
@@ -26,7 +26,7 @@ jobs:
 - template: templates/pr-gate-build-job.yml
   parameters:
     tool_chain_tag: 'VS2022'
-    vm_image: 'windows-2022'
+    vm_image: ${{ variables.default_windows_vm }}
     arch_list: "IA32,X64"
     usePythonVersion: ${{ variables.default_python_version }}
     extra_install_step:
diff --git a/.azurepipelines/templates/defaults.yml b/.azurepipelines/templates/defaults.yml
index 33d2e09a39..176035de63 100644
--- a/.azurepipelines/templates/defaults.yml
+++ b/.azurepipelines/templates/defaults.yml
@@ -10,3 +10,5 @@
 variables:
   default_python_version: "3.12"
   default_linux_image: "ghcr.io/tianocore/containers/fedora-43-test:bde74f8"
+  default_linux_vm: "ubuntu-24.04"
+  default_windows_vm: "windows-2022"
diff --git a/ArmVirtPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml b/ArmVirtPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
index 06405f44d6..b1e9f9f524 100644
--- a/ArmVirtPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
+++ b/ArmVirtPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
@@ -30,7 +30,7 @@ jobs:
   - job: Platform_CI
     variables:
       package: 'ArmVirtPkg'
-      vm_image: 'ubuntu-24.04'
+      vm_image: ${{ variables.default_linux_vm }}
       should_run: true
       run_flags: "MAKE_STARTUP_NSH=TRUE QEMU_HEADLESS=TRUE"
 
diff --git a/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml b/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
index 9e7bea3f6c..27c650f1a3 100644
--- a/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
+++ b/EmulatorPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
@@ -31,7 +31,7 @@ jobs:
   - job: Platform_CI
     variables:
       package: 'EmulatorPkg'
-      vm_image: 'ubuntu-24.04'
+      vm_image: ${{ variables.default_linux_vm }}
       should_run: false
       run_flags: "MAKE_STARTUP_NSH=TRUE"
 
diff --git a/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS.yml b/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS.yml
index 5c452d5174..8c21327fc2 100644
--- a/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS.yml
+++ b/EmulatorPkg/PlatformCI/.azurepipelines/Windows-VS.yml
@@ -31,7 +31,7 @@ jobs:
   - job: Platform_CI
     variables:
       package: 'EmulatorPkg'
-      vm_image: 'windows-2022'
+      vm_image: ${{ variables.default_windows_vm }}
       should_run: true
       run_flags: "MAKE_STARTUP_NSH=TRUE"
 
diff --git a/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml b/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
index 9b7a1a9218..c6938ebfa9 100644
--- a/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
+++ b/OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC.yml
@@ -30,7 +30,7 @@ jobs:
   - job: Platform_CI
     variables:
       package: 'OvmfPkg'
-      vm_image: 'ubuntu-24.04'
+      vm_image: ${{ variables.default_linux_vm }}
       should_run: true
       run_flags: "MAKE_STARTUP_NSH=TRUE QEMU_HEADLESS=TRUE"
 
diff --git a/OvmfPkg/PlatformCI/.azurepipelines/Windows-VS.yml b/OvmfPkg/PlatformCI/.azurepipelines/Windows-VS.yml
index 5d3ea1db41..ae53dd814d 100644
--- a/OvmfPkg/PlatformCI/.azurepipelines/Windows-VS.yml
+++ b/OvmfPkg/PlatformCI/.azurepipelines/Windows-VS.yml
@@ -30,7 +30,7 @@ jobs:
   - job: Platform_CI
     variables:
       package: 'OvmfPkg'
-      vm_image: 'windows-2022'
+      vm_image: ${{ variables.default_windows_vm }}
       should_run: true
       run_flags: "MAKE_STARTUP_NSH=TRUE QEMU_HEADLESS=TRUE"