Find all NUnit test assemblies recursively and run them using PowerShell

In order to grab all unit tests assemblies recursively within folder and run them using NUnit I used following PowerShell script. Here I am filtering assemblies found in obj folder.

$nunit = "C:\Program Files (x86)\NUnit 2.6.4\bin\nunit-console.exe"

$assemblies = ""

$items = Get-ChildItem  -Path .\Test  -Filter *UnitTests.dll -Recurse | Where {$_.FullName -notlike "*\obj\*"} 

foreach ($item in $items)

{

$assemblies = $assemblies + " " + $item.FullName  

}

$nunitcmd = """C:\Program Files (x86)\NUnit 2.6.4\bin\nunit-console.exe"" $assemblies /nologo /xml=c:\dump.xml"

$nunitcmd

cmd /c $nunitcmd