diff --git a/.github/actions/setup-build/action.yml b/.github/actions/setup-build/action.yml
index b0cf5485c..2fa907a01 100644
--- a/.github/actions/setup-build/action.yml
+++ b/.github/actions/setup-build/action.yml
@@ -366,7 +366,7 @@ runs:
         $WinSdkModuleMap = Join-Path $WindowsSdkShareFolder "winsdk.modulemap"
         curl -s `
           -H "Authorization: Bearer ${{ github.token }}" `
-          https://raw.githubusercontent.com/swiftlang/swift/main/stdlib/public/Platform/winsdk.modulemap `
+          https://raw.githubusercontent.com/swiftlang/swift/main/stdlib/public/Platform/winsdk_um.modulemap `
           -o $WinSdkModuleMap
         if ($LASTEXITCODE -eq 0) {
           Write-Output "ℹ️ Updated Windows SDK module map."
diff --git a/.github/workflows/test-setup-build.yml b/.github/workflows/test-setup-build.yml
index 8d9a6a630..46cfc57da 100644
--- a/.github/workflows/test-setup-build.yml
+++ b/.github/workflows/test-setup-build.yml
@@ -20,7 +20,7 @@ on:
         type: string
 
 env:
-  TEST_WIN_SDK_VERSION: "10.0.22000.0"
+  TEST_WIN_SDK_VERSION: "10.0.22621.0"
   TEST_MSVC_VERSION: "14.40"
   TEST_BUILD_TOOLS_EXPECTED_VERSION: "14.40.33807"
   TEST_UPSTREAM_SWIFT_VERSION: "5.10"