diff --git a/azure-pipelines-internal-tests.yml b/azure-pipelines-internal-tests.yml
index ef88dc4ef13..18e782cabb4 100644
--- a/azure-pipelines-internal-tests.yml
+++ b/azure-pipelines-internal-tests.yml
@@ -230,7 +230,49 @@ extends:
               - name: _HelixBuildConfig
                 value: $(_BuildConfig)
               - name: HelixTargetQueues
-                value: Windows.10.Amd64
+                value: Windows.11.Amd64.Client
+              - name: _HelixAccessToken
+                value: $(HelixApiAccessToken)
+            steps:
+              - task: NuGetCommand@2
+                displayName: 'Clear NuGet caches'
+                condition: succeeded()
+                inputs:
+                  command: custom
+                  arguments: 'locals all -clear'
+              - template: /eng/common/templates-official/steps/enable-internal-sources.yml
+              - template: /eng/common/templates-official/steps/enable-internal-runtimes.yml
+              - template: /eng/common/core-templates/steps/get-delegation-sas.yml
+                parameters:
+                  federatedServiceConnection: 'dotnetbuilds-internal-read'
+                  outputVariableName: 'dotnetbuilds-internal-container-read-token'
+                  expiryInHours: 3
+                  base64Encode: false
+                  storageAccount: dotnetbuilds
+                  container: internal
+                  permissions: rl
+              - script: restore.cmd -ci /p:configuration=$(_BuildConfig) $(_InternalRuntimeDownloadArgs)
+                displayName: Restore packages
+              - script: .dotnet\dotnet build eng\helix.proj /restore /t:Test /p:configuration=$(_BuildConfig) /bl:$(Build.SourcesDirectory)/artifacts/log/$(_BuildConfig)/SendToHelix.binlog $(_InternalRuntimeDownloadArgs)
+                displayName: Send tests to helix
+                env:
+                  HelixAccessToken: $(_HelixAccessToken)
+                  SYSTEM_ACCESSTOKEN: $(System.AccessToken)
+                  DotNetBuildsInternalReadSasToken: $(dotnetbuilds-internal-container-read-token)
+
+          - job: Helix_Windows_Cosmos
+            displayName: 'Helix Windows Cosmos'
+            timeoutInMinutes: 180
+            pool:
+              name: $(DncEngInternalBuildPool)
+              demands: ImageOverride -equals 1es-windows-2022
+              os: windows
+            variables:
+              - skipComponentGovernanceDetection: true
+              - name: _HelixBuildConfig
+                value: $(_BuildConfig)
+              - name: HelixTargetQueues
+                value: Windows.Server2025.Amd64
               - name: _HelixAccessToken
                 value: $(HelixApiAccessToken)
             steps:
diff --git a/azure-pipelines-public.yml b/azure-pipelines-public.yml
index 500c7be10b8..c62b0ed3b3d 100644
--- a/azure-pipelines-public.yml
+++ b/azure-pipelines-public.yml
@@ -152,7 +152,37 @@ stages:
               - name: _HelixBuildConfig
                 value: $(_BuildConfig)
               - name: HelixTargetQueues
-                value: Windows.10.Amd64.Open
+                value: Windows.11.Amd64.Client.Open
+              - name: _HelixAccessToken
+                value: ''
+            steps:
+              - task: NuGetCommand@2
+                displayName: 'Clear NuGet caches'
+                condition: succeeded()
+                inputs:
+                  command: custom
+                  arguments: 'locals all -clear'
+              - script: restore.cmd -ci /p:configuration=$(_BuildConfig) $(_InternalRuntimeDownloadArgs)
+                displayName: Restore packages
+              - script: .dotnet\dotnet build eng\helix.proj /restore /t:Test /p:configuration=$(_BuildConfig) /bl:artifacts/log/$(_BuildConfig)/SendToHelix.binlog $(_InternalRuntimeDownloadArgs)
+                displayName: Send tests to helix
+                env:
+                  HelixAccessToken: $(_HelixAccessToken)
+                  SYSTEM_ACCESSTOKEN: $(System.AccessToken)
+
+          - job: Helix_Windows_Cosmos
+            displayName: 'Helix Windows Cosmos'
+            timeoutInMinutes: 180
+            pool:
+              name: $(DncEngPublicBuildPool)
+              demands: ImageOverride -equals 1es-windows-2022-open
+            variables:
+              - skipComponentGovernanceDetection: true
+              - Codeql.SkipTaskAutoInjection: true
+              - name: _HelixBuildConfig
+                value: $(_BuildConfig)
+              - name: HelixTargetQueues
+                value: Windows.Server2025.Amd64.Open
               - name: _HelixAccessToken
                 value: ''
             steps:
diff --git a/eng/helix.proj b/eng/helix.proj
index da0da19701a..d6e9e084e41 100644
--- a/eng/helix.proj
+++ b/eng/helix.proj
@@ -18,7 +18,7 @@
 
   <PropertyGroup Condition = "'$(SYSTEM_ACCESSTOKEN)' == ''">
     <!-- Local build outside of Azure Pipeline -->
-    <HelixTargetQueues Condition = "'$(HelixTargetQueues)' == ''">Windows.10.Amd64.Open;OSX.15.Amd64.Open;OSX.15.ARM64.Open;Ubuntu.2204.Amd64.XL.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-22.04-helix-sqlserver-amd64;Ubuntu.2204.Amd64.XL.Open;Ubuntu.2204.Amd64.Open</HelixTargetQueues>
+    <HelixTargetQueues Condition = "'$(HelixTargetQueues)' == ''">Windows.11.Amd64.Client.Open;Windows.Server2025.Amd64.Open;OSX.15.Amd64.Open;OSX.15.ARM64.Open;Ubuntu.2204.Amd64.XL.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-22.04-helix-sqlserver-amd64;Ubuntu.2204.Amd64.XL.Open;Ubuntu.2204.Amd64.Open</HelixTargetQueues>
     <EnableAzurePipelinesReporter>false</EnableAzurePipelinesReporter>
     <HelixSource>efcore/localbuild/</HelixSource>
     <HelixBuild>t001</HelixBuild>
@@ -72,8 +72,10 @@
   </ItemGroup>
 
   <ItemGroup Condition = "'$(HelixTargetQueue.StartsWith(`Windows.Server2025.Amd64`))'">
-    <XUnitProject Update="$(CosmosTests)">
-      <PreCommands>$(PreCommands); set Test__Cosmos__SkipConnectionCheck=true</PreCommands>
+    <XUnitProject Remove="$(RepoRoot)/test/**/*.csproj"/>
+    <XUnitProject Remove="$(RepoRoot)/test/**/*.fsproj"/>
+    <XUnitProject Include="$(CosmosTests)">
+      <PreCommands>$(PreCommands); echo === Starting Cosmos Emulator ===; echo Waiting 120s for emulator startup...; powershell -Command "Start-Sleep -Seconds 120"; set Test__Cosmos__DefaultConnection=https://localhost:8081; set Test__Cosmos__SkipConnectionCheck=true</PreCommands>
     </XUnitProject>
   </ItemGroup>