diff --git a/utils/build.ps1 b/utils/build.ps1
index 0d834f224cd04..77c427d6f444c 100644
--- a/utils/build.ps1
+++ b/utils/build.ps1
@@ -1894,6 +1894,8 @@ function Test-Compilers([Hashtable] $Platform, [switch] $TestClang, [switch] $Te
       Write-Host "Copying '$RuntimeBinaryCache\bin\swiftCore.dll' to '$(Get-ProjectBinaryCache $BuildPlatform Compilers)\bin'"
       Copy-Item "$RuntimeBinaryCache\bin\swiftCore.dll" "$(Get-ProjectBinaryCache $BuildPlatform Compilers)\bin"
 
+      $env:Path = "$(Get-PythonPath $BuildPlatform)\tools;$env:Path"
+
       $TestingDefines += @{
         LLDB_INCLUDE_TESTS = "YES";
         # Check for required Python modules in CMake