diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index d9434f83f..3178f9f74 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -28,14 +28,13 @@ endforeach()
 # $1 exec, $2 input, $3 output_result
 if(WIN32)
 FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/test_helper.ps1
-"$PSDefaultParameterValues['*:Encoding'] = 'ascii'\n"
+"$PSDefaultParameterValues['Out-File:Encoding'] = 'utf8NoBOM'\n"
 "if (Test-Path $args[2]) { Remove-Item -Force $args[2] } \n"
 "$ErrorActionPreference = \"Stop\"\n"
-"$OutputEncoding = [Text.UTF8Encoding]::new($false)\n"
 "$OutputEncoding\n"
 "Get-Content $args[1]\n"
-"Get-Content $args[1] | & file -\n"
-"Get-Content $args[1] | & $args[0]\n"
+"Get-Content $args[1] -Encoding utf8NoBOM | & file -\n"
+"Get-Content $args[1] -Encoding utf8NoBOM | & $args[0]\n"
 "If ((Get-Content $args[2] | %{$_ -match \"FATAL\"}) -contains $true) {\n"
 "echo Error\n"
 "exit 1\n"