Can you Mock an internal locally scoped function in Pester?

pester-mock-example

######## SCRIPT EXAMPLE ########
function Do-SomethingStupid
{
	function local:Get-NumberFive
	{
		return 5
	}
	$value = Get-NumberFive
	if (value -ne 5)
	{
		throw "ERROR"
	}
	Write-Output "Value $value"
}

######### PESTER TEST #######
$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.'
. "$here\$sut"

Describe "Do-SomethingStupid" {
	Context 'Wrong value returned' {
		#### THIS MOCK WILL NOT WORK. I GET AN ERROR ON VALIDATE-FUNCTION ####
		Mock Get-NumberFive {2}
		It 'Should not fail due to wrong value' {
			{Do-SomethingStupid} | Should Throw
		}
	}
}