diff --git a/utils/android/emulator/ctest-libdispatch.sh b/utils/android/emulator/ctest-libdispatch.sh
new file mode 100644
index 0000000000000..4ebe1eb554ab7
--- /dev/null
+++ b/utils/android/emulator/ctest-libdispatch.sh
@@ -0,0 +1,49 @@
+#!/system/bin/sh
+
+if [ -z "$1" ]; then
+    echo "Usage: $0 <sub-directory>"
+    exit 1
+fi
+
+SUB_DIR=$1
+if [ ! -d "$SUB_DIR" ]; then
+    echo "Error: Directory $SUB_DIR does not exist"
+    exit 1
+fi
+
+UTILITY="$SUB_DIR/bsdtestharness"
+if [ ! -f "$UTILITY" ]; then
+    echo "Utility not found: $UTILITY."
+    exit 1
+fi
+
+# FIXME: Add this script to libdispatch and let CMake inject actual test at configuration time
+TESTS="apply api debug queue_finalizer overcommit context_for_key after timer timer_short timer_timeout sema timer_bit31 timer_bit63 timer_set_time data io_muxed io_net io_pipe io_pipe_close select c99 plusplus"
+COUNT=$(echo "$TESTS" | tr ' ' '\n' | wc -l)
+echo "Found $COUNT test-cases in $SUB_DIR"
+
+# Tests depend on libdispatch.so and libBlocksRuntime.so
+export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$SUB_DIR"
+
+TIMOUT=120
+FAILURE=0
+chmod +x "$UTILITY"
+
+for TEST in $TESTS; do
+    chmod +x "$SUB_DIR/dispatch_$TEST"
+    OUTPUT=$(timeout "${TIMOUT}s" "$UTILITY" "$SUB_DIR/dispatch_$TEST" 2>&1)
+    EC=$?
+    if [ $EC -eq 124 ]; then
+        echo "Error: dispatch_$TEST timed out after $TIMOUT seconds"
+        echo "************\nOutput:\n$OUTPUT\n************"
+        FAILURE=1
+    elif [ $EC -ne 0 ]; then
+        echo "Error: dispatch_$TEST failed"
+        echo "************\nOutput:\n$OUTPUT\n************"
+        FAILURE=1
+    else
+        echo "dispatch_$TEST passed"
+    fi
+done
+
+exit $FAILURE
diff --git a/utils/build-windows-toolchain.bat b/utils/build-windows-toolchain.bat
index 131c283eddc1e..d831a23778958 100644
--- a/utils/build-windows-toolchain.bat
+++ b/utils/build-windows-toolchain.bat
@@ -60,7 +60,7 @@ set TMPDIR=%BuildRoot%\tmp
 set NINJA_STATUS=[%%f/%%t][%%p][%%es] 
 
 :: Build the -Test argument, if any, by subtracting skipped tests
-set TestArg=-Test lld,lldb,swift,dispatch,foundation,xctest,swift-format,sourcekit-lsp,
+set TestArg=-Test dispatch,
 for %%I in (%SKIP_TESTS%) do (call set TestArg=%%TestArg:%%I,=%%)
 if "%TestArg:~-1%"=="," (set TestArg=%TestArg:~0,-1%) else (set TestArg= )
 
@@ -77,6 +77,8 @@ powershell.exe -ExecutionPolicy RemoteSigned -File %~dp0build.ps1 ^
   -ImageRoot %BuildRoot% ^
   %SkipPackagingArg% ^
   %TestArg% ^
+  -AndroidSDKs x86_64 ^
+  -WindowsSDKs X64 ^
   -Stage %PackageRoot% ^
   -Summary || (exit /b 1)
 
diff --git a/utils/build.ps1 b/utils/build.ps1
index fded44e3e7d1c..a821d043604dd 100644
--- a/utils/build.ps1
+++ b/utils/build.ps1
@@ -760,7 +760,12 @@ function Fetch-Dependencies {
     }
   }
 
-  if ($SkipBuild -and $SkipPackaging) { return }
+  if ($SkipBuild -and $SkipPackaging -and -not $Test) { return }
+
+  $Stopwatch = [Diagnostics.Stopwatch]::StartNew()
+  if ($ToBatch) {
+    Write-Host -ForegroundColor Cyan "[$([DateTime]::Now.ToString("yyyy-MM-dd HH:mm:ss"))] Fetch-Dependencies..."
+  }
 
   $Stopwatch = [Diagnostics.Stopwatch]::StartNew()
   if ($ToBatch) {
@@ -772,7 +777,7 @@ function Fetch-Dependencies {
   DownloadAndVerify $WixURL "$BinaryCache\WiX-$WiXVersion.zip" $WiXHash
   Extract-ZipFile WiX-$WiXVersion.zip $BinaryCache WiX-$WiXVersion
 
-  if ($SkipBuild) { return }
+  if ($SkipBuild -and -not $Test) { return }
 
   DownloadAndVerify $PinnedBuild "$BinaryCache\$PinnedToolchain.exe" $PinnedSHA256
 
@@ -865,6 +870,62 @@ function Fetch-Dependencies {
     DownloadAndVerify $NDKURL "$BinaryCache\android-ndk-$AndroidNDKVersion-windows.zip" $NDKHash
 
     Extract-ZipFile -ZipFileName "android-ndk-$AndroidNDKVersion-windows.zip" -BinaryCache $BinaryCache -ExtractPath "android-ndk-$AndroidNDKVersion" -CreateExtractPath $false
+
+    # FIXME: Both Java and Android emulator must be available in the environment.
+    # This is a terrible workaround. It's a waste of time and resources.
+    $SDKDir = "$BinaryCache\android-sdk"
+    if ($Test -and -not(Test-Path "$SDKDir\licenses")) {
+      # Download Java Runtime
+      switch ($BuildArchName) {
+        "AMD64" {
+          $JavaURL = "https://aka.ms/download-jdk/microsoft-jdk-17.0.14-windows-x64.zip"
+          $JavaHash = "3619082f4a667f52c97cce983364a517993f798ae248c411765becfd9705767f"
+        }
+        "ARM64" {
+          $JavaURL = "https://aka.ms/download-jdk/microsoft-jdk-17.0.14-windows-aarch64.zip"
+          $JavaHash = "2a12c7b3d46712de9671f5f011a3cae9ee53d5ff3b0604136ee079a906146448"
+        }
+        default { throw "Unsupported processor architecture" }
+      }
+      DownloadAndVerify $JavaURL "$BinaryCache\microsoft-jdk.zip" $JavaHash
+      Extract-ZipFile -ZipFileName "microsoft-jdk.zip" -BinaryCache $BinaryCache -ExtractPath "android-sdk-jdk"
+
+      # Download cmdline-tools
+      $CLToolsURL = "https://dl.google.com/android/repository/commandlinetools-win-11076708_latest.zip"
+      $CLToolsHash = "4d6931209eebb1bfb7c7e8b240a6a3cb3ab24479ea294f3539429574b1eec862"
+      DownloadAndVerify $CLToolsURL "$BinaryCache\android-cmdline-tools.zip" $CLToolsHash
+      Extract-ZipFile -ZipFileName "android-cmdline-tools.zip" -BinaryCache $BinaryCache -ExtractPath "android-sdk-cmdline-tools"
+
+      # Accept licenses
+      New-Item -Type Directory -Path "$SDKDir\licenses" -ErrorAction Ignore | Out-Null
+      Set-Content -Path "$SDKDir\licenses\android-sdk-license" -Value "24333f8a63b6825ea9c5514f83c2829b004d1fee"
+      Set-Content -Path "$SDKDir\licenses\android-sdk-preview-license" -Value "84831b9409646a918e30573bab4c9c91346d8abd"
+
+      # Install packages and create test device
+      Isolate-EnvVars {
+        $env:JAVA_HOME = "$BinaryCache\android-sdk-jdk\jdk-17.0.14+7"
+        $env:Path = "${env:JAVA_HOME}\bin;${env:Path}"
+
+        # Let cmdline-tools install itself. This is idiomatic for installing the Android SDK.
+        Invoke-Program "$BinaryCache\android-sdk-cmdline-tools\cmdline-tools\bin\sdkmanager.bat" -OutNull "--sdk_root=$SDKDir" '"cmdline-tools;latest"' '--channel=3'
+        $AndroidSdkMgr = "$SDKDir\cmdline-tools\latest\bin\sdkmanager.bat"
+        foreach ($Package in @('"system-images;android-29;default;x86_64"', '"platforms;android-29"', '"platform-tools"')) {
+          Write-Host "$AndroidSdkMgr $Package"
+          Invoke-Program -OutNull $AndroidSdkMgr $Package
+        }
+
+        # There is no way to disable interactive mode in avdmanager
+        "no" | & "$SDKDir\cmdline-tools\latest\bin\avdmanager.bat" create avd --force --name '"swift-test-device"' --package '"system-images;android-29;default;x86_64"'
+
+        # Dump virtual devices to confirm that swift-test-device exists
+        Invoke-Program "$SDKDir\cmdline-tools\latest\bin\avdmanager.bat" list avd
+
+        # Grant network access permission to CLI tool
+        $adb = "$BinaryCache\android-sdk\platform-tools\adb.exe"
+        New-NetFirewallRule -DisplayName "abd inbound" -Direction Inbound -Program $adb -RemoteAddress LocalSubnet -Action Allow
+        New-NetFirewallRule -DisplayName "abd outbound" -Direction Outbound -Program $adb -RemoteAddress LocalSubnet -Action Allow
+      }
+    }
   }
 
   if ($IncludeDS2) {
@@ -916,6 +977,124 @@ function Fetch-Dependencies {
   }
 }
 
+$AndroidEmulatorPid = $null
+$AndroidEmulatorArchName = $null
+
+function AndroidEmulator-CreateDevice($ArchName) {
+  $DeviceName = "swift-test-device-$ArchName"
+  $Packages = "system-images;android-29;default;$ArchName"
+  $AvdTool = "$BinaryCache\android-sdk\cmdline-tools\latest\bin\avdmanager.bat"
+
+  $Output = & $AvdTool list avd
+  if ($Output -match $DeviceName) {
+    Write-Host "Found Android virtual device for arch $ArchName"
+  } else {
+    Write-Host "Create Android virtual device for arch $ArchName"
+    # We had issues with not closing file handles to the created AVD, which
+    # caused the emulator to crash at startup. Using `Start-Process` instead of
+    # the `&` operator prevents that.
+    Start-Process "cmd.exe" -ArgumentList "/c echo no | $AvdTool create avd --force --name $DeviceName --package $Packages" -NoNewWindow -Wait
+  }
+  return $DeviceName
+}
+
+function AndroidEmulator-Run($ArchName) {
+  if ($AndroidEmulatorArchName -ne $ArchName) {
+    AndroidEmulator-TearDown
+  }
+  if ($AndroidEmulatorPid -eq $null) {
+    Isolate-EnvVars {
+      $env:ANDROID_SDK_HOME = "$BinaryCache\android-sdk"
+      $env:JAVA_HOME = "$BinaryCache\android-sdk-jdk\jdk-17.0.14+7"
+      $env:Path = "${env:JAVA_HOME}\bin;${env:Path}"
+
+      Write-Host "ANDROID_SDK_HOME = $env:ANDROID_SDK_HOME"
+      $AvdTool = "$BinaryCache\android-sdk\cmdline-tools\latest\bin\avdmanager.bat"
+      Write-Host "$AvdTool list avd reports:"
+      Invoke-Program $AvdTool list avd
+
+      $Device = (AndroidEmulator-CreateDevice $ArchName)
+
+      Write-Host "$AvdTool list avd reports:"
+      Invoke-Program $AvdTool list avd
+
+      $EmuTool = "$BinaryCache\android-sdk\emulator\emulator.exe"
+      Write-Host "$EmuTool -list-avds reports:"
+      Invoke-Program $EmuTool -list-avds
+
+      Write-Host "$EmuTool -accel-check reports:"
+      Invoke-Program $EmuTool -accel-check
+
+      Write-Host "Start Android emulator for arch $ArchName"
+      $Args = "-verbose -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none -avd $Device"
+      foreach($Attempt in 1..5) {
+        $Process = Start-Process -PassThru -NoNewWindow $EmuTool -ArgumentList $Args `
+                                 -RedirectStandardError "$BinaryCache\emulator-stderr.log" `
+                                 -RedirectStandardOutput "$BinaryCache\emulator-stdout.log"
+        try {
+          Write-Host "Waiting for process $($Process.Id) to start"
+          Start-Sleep -Seconds 1
+          $_ = Get-Process -Id $Process.Id
+          break
+        } catch {
+          if ($Attempt -lt 5) {
+            Write-Host "Process $($Process.Id) failed to start, trying again..."
+            Start-Sleep -Seconds 3
+          } else {
+            throw "Android emulator process $($Process.Id) failed to start."
+          }
+        }
+      }
+
+      $global:AndroidEmulatorPid = $Process.Id
+      $global:AndroidEmulatorArchName = $ArchName
+
+      Write-Host "Waiting while Android emulator boots in process $AndroidEmulatorPid"
+      $adb = "$BinaryCache\android-sdk\platform-tools\adb.exe"
+      foreach($Attempt in 1..5) {
+        Start-Sleep -Seconds 10
+        $Process = Start-Process $adb "wait-for-device" -PassThru -NoNewWindow
+        try {
+          Write-Host "adb wait-for-device running in process $($Process.Id)"
+          Wait-Process -Id $Process.Id -Timeout 20
+          break
+        } catch {
+          if ($Attempt -lt 5) {
+            Write-Host "adb failed to connect. Shutting it down."
+            Stop-Process -Force -Id $Process.Id
+          } else {
+            throw "Android Debug Bridge process $($Process.Id) failed to connect."
+          }
+        }
+      }
+
+      Write-Host "SUCCESS: Emulator ready"
+    }
+  }
+}
+
+function AndroidEmulator-TearDown() {
+  if ($AndroidEmulatorPid -ne $null) {
+    if (Get-Process -Id $AndroidEmulatorPid -ErrorAction SilentlyContinue) {
+      Write-Host "Tear down Android emulator for arch $AndroidEmulatorArchName"
+      $adb = "$BinaryCache\android-sdk\platform-tools\adb.exe"
+      & $adb emu kill | Out-Null
+      & $adb kill-server | Out-Null
+
+      try {
+        Write-Host "Waiting for process $AndroidEmulatorPid to exit"
+        Wait-Process -Id $AndroidEmulatorPid -Timeout 1
+      } catch {
+        Write-Host "Process $AndroidEmulatorPid failed to exit. Shutting it down."
+        Stop-Process -Force -Id $AndroidEmulatorPid
+      }
+
+      $global:AndroidEmulatorPid = $null
+      $global:AndroidEmulatorArchName = $null
+    }
+  }
+}
+
 function Get-PinnedToolchainToolsDir() {
   # NOTE: add a workaround for the main snapshots that used the wrong version
   # when building that was not noticed. This allows use of the nightly snapshot
@@ -2165,6 +2344,50 @@ function Build-Dispatch([Platform]$Platform, $Arch, [switch]$Test = $false) {
   }
 }
 
+function Test-Dispatch([Platform]$Platform) {
+  # Install packages and create test device
+  Isolate-EnvVars {
+    $env:JAVA_HOME = "$BinaryCache\android-sdk-jdk\jdk-17.0.14+7"
+    $env:Path = "${env:JAVA_HOME}\bin;${env:Path}"
+
+    # TODO: One emulator instance for all tests?
+    $emulator = "$BinaryCache\android-sdk\emulator\emulator.exe"
+    Write-Host    "$emulator -version"
+    Invoke-Program $emulator "-version"
+
+    # Dump virtual devices (again) to confirm that swift-test-device exists
+    Invoke-Program "$BinaryCache\android-sdk\cmdline-tools\latest\bin\avdmanager.bat" list avd
+
+    Start-Process -FilePath $emulator -ArgumentList "@swift-test-device"
+    Start-Sleep -Seconds 30
+
+    # This is just a hack for now
+    $CachePath = (Get-TargetProjectBinaryCache $AndroidX64 Dispatch)
+    $CacheName = Split-Path $CachePath -Leaf
+    $RemoteRoot = "/data/local/tmp"
+
+    # TODO: On my local machine I have to grant adb.exe network access once. How to do that in CI?
+    $adb = "$BinaryCache\android-sdk\platform-tools\adb.exe"
+    Write-Host    "$adb version"
+    Invoke-Program $adb "version"
+    Write-Host    "$adb get-state @swift-test-device"
+    &              $adb get-state "@swift-test-device"
+    Write-Host    "$adb logcat -d @swift-test-device"
+    &              $adb logcat -d "@swift-test-device"
+    #Write-Host    "$BinaryCache\android-sdk\.temp\emulator.out log:"
+    #Write-Host    (Get-Content -Path "$BinaryCache\android-sdk\.temp\emulator.out")
+    #Write-Host    "$BinaryCache\android-sdk\.temp\emulator.err log:"
+    #Write-Host    (Get-Content -Path "$BinaryCache\android-sdk\.temp\emulator.err")
+    Invoke-Program $adb "wait-for-device"
+    Write-Host    "$adb push $CachePath $RemoteRoot"
+    Invoke-Program $adb push $CachePath $RemoteRoot
+    Write-Host    "$adb shell sh $RemoteRoot/$CacheName/tests/ctest-android.sh"
+    Invoke-Program $adb shell "sh $RemoteRoot/$CacheName/tests/ctest-android.sh"
+    Invoke-Program $adb emu kill
+    Invoke-Program $adb kill-server
+  }
+}
+
 function Build-Foundation {
   [CmdletBinding(PositionalBinding = $false)]
   param
@@ -3092,6 +3315,10 @@ try {
 
 Fetch-Dependencies
 
+AndroidEmulator-Run $AndroidX64.LLVMName
+AndroidEmulator-TearDown
+exit(1)
+
 if ($Clean) {
   foreach ($project in [HostComponent]::GetNames([HostComponent])) {
     if ($project -eq "Compilers") { continue }
@@ -3261,6 +3488,10 @@ if (-not $IsCrossCompiling) {
 
   if ($Test -contains "dispatch") {
     Build-Dispatch Windows $HostArch -Test
+    # TODO: This is a hack. We need different devices for different arches.
+    if ($AndroidSDKs -contains "x86_64") {
+      Test-Dispatch Android $AndroidX64
+    }
   }
   if ($Test -contains "foundation") {
     Build-Foundation Windows $HostArch -Test
@@ -3304,6 +3535,14 @@ if (-not $IsCrossCompiling) {
 
   exit 1
 } finally {
+  AndroidEmulator-TearDown
+
+  Write-Host "******** emulator-stderr.log ********"
+  Get-Content -Path "$BinaryCache\emulator-stderr.log"
+
+  Write-Host "******** emulator-stdout.log ********"
+  Get-Content -Path "$BinaryCache\emulator-stdout.log"
+
   if ($Summary) {
     $TimingData | Select-Object Platform,Arch,Checkout,"Elapsed Time" | Sort-Object -Descending -Property "Elapsed Time" | Format-Table -AutoSize
   }