diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index dc7d46e65..3e4ba762e 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -37,7 +37,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: '9.x'
+        dotnet-version: '10.x'
 
     - name: Log disk space (after .NET setup)
       uses: ./.github/workflows/log-disk-space
diff --git a/build/ci/setup-environment.yml b/build/ci/setup-environment.yml
index ca137af08..f841ec812 100644
--- a/build/ci/setup-environment.yml
+++ b/build/ci/setup-environment.yml
@@ -18,13 +18,6 @@ steps:
       version: $(dotnetVersion)
     condition: ne('$(dotnetVersion)', '')
 
-  - task: UseDotNet@2
-    displayName: 'Use dotnet $(dotnetNextVersion)'
-    inputs:
-      version: $(dotnetNextVersion)
-      performMultiLevelLookup: true
-    condition: ne('$(dotnetNextVersion)', '')
-
   - script: dotnet --info
     displayName: Display dotnet info
 
diff --git a/build/ci/variables.yml b/build/ci/variables.yml
index 537995561..47807a3c3 100644
--- a/build/ci/variables.yml
+++ b/build/ci/variables.yml
@@ -19,7 +19,7 @@ variables:
   macosAgentPoolName: VSEng-VSMac-Xamarin-Shared                                        # macOS VM pool name
   
   # Tool variables
-  dotnetVersion: '9.0.308'                                                              # .NET version to install on agent
+  dotnetVersion: '10.x'                                                                 # .NET version to install on agent
   dotnetFrameworkVersion: 9                                                             # The number to use for TF (eg: netX.0-android)
   dotnetNuGetOrgSource: 'https://api.nuget.org/v3/index.json'                           # NuGet.org URL to find workloads
 
@@ -33,10 +33,6 @@ variables:
   extendedTestProject: tests/extended/ExtendedTests.csproj                                                      # Extended tests project file
   extendedTestAssembly: tests/extended/bin/$(configuration)/net$(dotnetFrameworkVersion).0/ExtendedTests.dll    # Extended tests compiled binary
 
-  # dotnet-next test variables
-  dotnetNextVersion: 10.0.100                                                           # .NET version to install
-  dotnetNextFrameworkVersion: 10                                                        # The number to use for TF (eg: netX.0-android)
-
   # dnceng-public variables
   NetCorePublicPoolName: NetCore-Public-XL
   WindowsPoolImageNetCorePublic: windows.vs2022.amd64.open