diff --git a/azure-pipelines-PR.yml b/azure-pipelines-PR.yml
index f863a74128..0f8bfcea2f 100644
--- a/azure-pipelines-PR.yml
+++ b/azure-pipelines-PR.yml
@@ -55,6 +55,8 @@ variables:
     value: Release
   - name: _PublishUsingPipelines
     value: true
+  - name: _WindowsMachineQueueName
+    value: windows.vs2026preview.scout.amd64.open
   - name: VisualStudioDropName
     value: Products/$(System.TeamProject)/$(Build.Repository.Name)/$(Build.SourceBranchName)/$(Build.BuildNumber)
   - name: Codeql.Enabled
@@ -101,7 +103,7 @@ stages:
             value: Test
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 90
           strategy:
             maxParallel: 2
@@ -216,12 +218,8 @@ stages:
 
         - job: WindowsLangVersionPreview
           pool:
-            # The PR build definition sets this variable:
-            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
-            # and there is an alternate build definition that sets this to a queue that is always scouting the
-            # next preview of Visual Studio.
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 120
           steps:
           - checkout: self
@@ -256,12 +254,8 @@ stages:
 
         - job: WindowsNoRealsig_testCoreclr
           pool:
-            # The PR build definition sets this variable:
-            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
-            # and there is an alternate build definition that sets this to a queue that is always scouting the
-            # next preview of Visual Studio.
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 120
           steps:
           - checkout: self
@@ -306,12 +300,8 @@ stages:
 
         - job: WindowsNoRealsig_testDesktop
           pool:
-            # The PR build definition sets this variable:
-            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
-            # and there is an alternate build definition that sets this to a queue that is always scouting the
-            # next preview of Visual Studio.
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 120
           strategy:
             parallel: 4
@@ -359,12 +349,8 @@ stages:
 
         - job: WindowsStrictIndentation
           pool:
-            # The PR build definition sets this variable:
-            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
-            # and there is an alternate build definition that sets this to a queue that is always scouting the
-            # next preview of Visual Studio.
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 120
           steps:
           - checkout: self
@@ -400,7 +386,7 @@ stages:
         - job: WindowsNoStrictIndentation
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 120
           steps:
           - checkout: self
@@ -441,12 +427,8 @@ stages:
           - name: __VSNeverShowWhatsNew
             value: 1
           pool:
-            # The PR build definition sets this variable:
-            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
-            # and there is an alternate build definition that sets this to a queue that is always scouting the
-            # next preview of Visual Studio.
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 120
           strategy:
             matrix:
@@ -546,12 +528,8 @@ stages:
           - name: __VSNeverShowWhatsNew
             value: 1
           pool:
-            # The PR build definition sets this variable:
-            #   WindowsMachineQueueName=Windows.vs2022.amd64.open
-            # and there is an alternate build definition that sets this to a queue that is always scouting the
-            # next preview of Visual Studio.
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           timeoutInMinutes: 120
           strategy:
             parallel: 4
@@ -622,7 +600,7 @@ stages:
         - job: MockOfficial
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           steps:
           - checkout: self
             clean: true
@@ -721,7 +699,7 @@ stages:
         - job: EndToEndBuildTests
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           strategy:
             maxParallel: 2
             matrix:
@@ -772,7 +750,7 @@ stages:
         - job: Plain_Build_Windows
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           variables:
           - name: _BuildConfig
             value: Debug
@@ -827,7 +805,7 @@ stages:
         - job: Benchmarks
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           variables:
           - name: _BuildConfig
             value: Release
@@ -843,7 +821,7 @@ stages:
         - job: Build_And_Test_AOT_Windows
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           strategy:
             maxParallel: 2
             matrix:
@@ -884,7 +862,7 @@ stages:
         - job: ILVerify
           pool:
             name: $(DncEngPublicBuildPool)
-            demands: ImageOverride -equals $(WindowsMachineQueueName)
+            demands: ImageOverride -equals $(_WindowsMachineQueueName)
           steps:
           - checkout: self
             clean: true