function New-DynamicAttr($ParamDictionary, $Name, $Alias = $null) {
    $attr = New-Object -Type `
        System.Management.Automation.ParameterAttribute
    $attr.Mandatory = $false
    $attr.ParameterSetName = '__AllParameterSets'
    $attributeCollection = New-Object `
        -Type System.Collections.ObjectModel.Collection[System.Attribute]
    $attributeCollection.Add($attr)

    if ($null -ne $Alias) {
        $attr = New-Object -Type `
            System.Management.Automation.AliasAttribute -ArgumentList @($Alias)
        $attributeCollection.Add($attr)
    }

    $dynParam1 = New-Object -Type `
        System.Management.Automation.RuntimeDefinedParameter($Name, [string],
        $attributeCollection)

    $ParamDictionary.Add($Name, $dynParam1)
}

function Test-DynamicParam {
    [CmdletBinding()]
    param(
        [String]$Name
    )

    dynamicparam {
        if ($Name.StartsWith("Hello")) {
            $paramDictionary = New-Object `
                -Type System.Management.Automation.RuntimeDefinedParameterDictionary
            New-DynamicAttr -ParamDictionary $paramDictionary -Name "PSEdition"
          
            return $paramDictionary
        }
    }

    process {
        if ($PSBoundParameters.PSEdition) {
            Write-Host "PSEdition value: $($PSBoundParameters.PSEdition)"
        }
    }
}

Describe 'Usage of Alias in DynamicParams' {
    Context 'Usage of ParameterFilters in Mock' {

        It 'using conflicting PSEdition parameter name' {
            Mock Test-DynamicParam { "World" } -ParameterFilter {$PSEdition -eq 'Desktop'}

            Test-DynamicParam -Name "Hello" -PSEdition 'Desktop' | Should -Be 'World'
        }
    }

     Context 'Usage of ParameterFilters in Assert-MockCalled' {
        It 'using conflicting PSEdition parameter name' {
            Mock Test-DynamicParam { "World" }

            Test-DynamicParam -Name "Hello" -PSEdition 'Desktop' | Should -Be 'World'

            Assert-MockCalled Test-DynamicParam -ParameterFilter {$PSEdition -eq 'Desktop'}
        }
    }
}

Pester version     : 4.7.3 C:\Program Files\PowerShell\Modules\Pester\4.7.3\Pester.psd1
PowerShell version : 6.1.3
OS version         : Microsoft Windows NT 10.0.17134.0