diff --git a/build-system/pr-validation.yaml b/build-system/pr-validation.yaml
index ad015f2dbef..41b9a77bb34 100644
--- a/build-system/pr-validation.yaml
+++ b/build-system/pr-validation.yaml
@@ -75,7 +75,7 @@ jobs:
         displayName: Windows Build
         inputs:
           filename: build.cmd
-          arguments: buildRelease # incremental # Run an incremental build
+          arguments: buildRelease incremental targetBranch=feature/async_testkit # Run an incremental build
         continueOnError: true
         condition: eq( variables['Agent.OS'], 'Windows_NT' )
       - task: CopyFiles@2
@@ -100,7 +100,7 @@ jobs:
       displayName: ".NET Framework Unit Tests (Windows)"
       vmImage: "windows-2019"
       scriptFileName: build.cmd
-      scriptArgs: runTests # incremental
+      scriptArgs: runTests incremental targetBranch=feature/async_testkit
       outputDirectory: "TestResults"
       artifactName: "netfx_tests_windows-$(Build.BuildId)"
 
@@ -110,7 +110,7 @@ jobs:
       displayName: ".NET Core Unit Tests (Windows)"
       vmImage: "windows-2019"
       scriptFileName: build.cmd
-      scriptArgs: runTestsNetCore # incremental
+      scriptArgs: runTestsNetCore incremental targetBranch=feature/async_testkit
       outputDirectory: "TestResults"
       artifactName: "net_core_tests_windows-$(Build.BuildId)"
 
@@ -120,7 +120,7 @@ jobs:
       displayName: ".NET Core Unit Tests (Linux)"
       vmImage: "ubuntu-18.04"
       scriptFileName: "./build.sh"
-      scriptArgs: runTestsNetCore # incremental
+      scriptArgs: runTestsNetCore incremental targetBranch=feature/async_testkit
       outputDirectory: "TestResults"
       artifactName: "net_core_tests_linux-$(Build.BuildId)"
 
@@ -141,7 +141,7 @@ jobs:
       displayName: ".NET 5 Unit Tests (Windows)"
       vmImage: "windows-2019"
       scriptFileName: build.cmd
-      scriptArgs: runTestsNet # incremental
+      scriptArgs: runTestsNet incremental targetBranch=feature/async_testkit
       outputDirectory: "TestResults"
       artifactName: "net_5_tests_windows-$(Build.BuildId)"
 
@@ -151,7 +151,7 @@ jobs:
       displayName: ".NET 5 Unit Tests (Linux)"
       vmImage: "ubuntu-18.04"
       scriptFileName: "./build.sh"
-      scriptArgs: runTestsNet # incremental
+      scriptArgs: runTestsNet incremental targetBranch=feature/async_testkit
       outputDirectory: "TestResults"
       artifactName: "net_5_tests_linux-$(Build.BuildId)"
 
@@ -161,7 +161,7 @@ jobs:
       displayName: ".NET Core Multi-Node Tests (Windows)"
       vmImage: "windows-2019"
       scriptFileName: "build.cmd"
-      scriptArgs: MultiNodeTestsNetCore # incremental
+      scriptArgs: MultiNodeTestsNetCore incremental targetBranch=feature/async_testkit
       outputDirectory: "TestResults"
       artifactName: "net_core_mntr_windows-$(Build.BuildId)"
       mntrFailuresDir: 'TestResults\\multinode'
@@ -173,7 +173,7 @@ jobs:
       displayName: ".NET 5 Multi-Node Tests (Windows)"
       vmImage: "windows-2019"
       scriptFileName: "build.cmd"
-      scriptArgs: MultiNodeTestsNet # incremental
+      scriptArgs: MultiNodeTestsNet incremental targetBranch=feature/async_testkit
       outputDirectory: "TestResults"
       artifactName: "net_5_mntr_windows-$(Build.BuildId)"
       mntrFailuresDir: 'TestResults\\multinode'
@@ -185,6 +185,6 @@ jobs:
       displayName: "NuGet Pack"
       vmImage: "windows-2019"
       scriptFileName: build.cmd
-      scriptArgs: CreateNuget nugetprerelease=dev # incremental
+      scriptArgs: CreateNuget nugetprerelease=dev incremental targetBranch=feature/async_testkit
       outputDirectory: "bin/nuget"
       artifactName: "nuget_pack-$(Build.BuildId)"