diff --git a/test/NewPSScriptFileInfo.Tests.ps1 b/test/NewPSScriptFileInfo.Tests.ps1
new file mode 100644
index 000000000..3ba34acf3
--- /dev/null
+++ b/test/NewPSScriptFileInfo.Tests.ps1
@@ -0,0 +1,299 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+Import-Module "$psscriptroot\PSGetTestUtils.psm1" -Force
+
+Describe "Test New-PSScriptFileInfo" {
+    BeforeAll {
+        $script:TempPath = Get-TempPath
+    }
+    BeforeEach {
+        # Create temp script path
+        $script:TempScriptPath = Join-Path $script:TempPath "PSGet_$(Get-Random)"
+        $null = New-Item -Path $script:TempScriptPath -ItemType Directory -Force
+  
+        $script:PSScriptInfoName = "PSGetTestScript"
+        $script:testPSScriptInfoPath = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath "$script:PSScriptInfoName.psd1"
+    }
+    AfterEach {
+        RemoveItem "$script:TempScriptPath"
+    }
+
+    ### TODO:  Add tests for -Force and -WhatIf if those parameters are applicable
+<#
+    It "Create .ps1 file with minimal required fields" {    
+        $Description = "this is a test script"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Description $Description
+
+        Test-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+    }
+
+    It "Create .ps1 file with relative path" {
+        $RelativeCurrentPath = Get-Location
+        $ScriptFilePath = Join-Path -Path $relativeCurrentPath -ChildPath "$script:PSScriptInfoName.ps1"
+        $Description = "this is a test script"
+        New-PSScriptFileInfo -FilePath $ScriptFilePath -Description $Description
+
+        Test-PSScriptFileInfo -FilePath $ScriptFilePath | Should -BeTrue
+        Remove-Item -Path $ScriptFilePath
+    }
+
+    It "Create new .ps1 given Version parameter" {
+        $Version =  "2.0.0.0"
+        $Description = "Test description"
+
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Version $Version -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Version) | Should -BeTrue
+        $results.Contains(".VERSION $Version") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given Guid parameter" {
+        $Guid = [guid]::NewGuid()
+        $Description = "Test description"
+
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Guid $Guid -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Guid) | Should -BeTrue
+        $results.Contains(".GUID $Guid") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given Author parameter" {
+        $Author = "Test Author" 
+        $Description = "Test description"
+
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Author $Author -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Author) | Should -BeTrue
+        $results.Contains(".AUTHOR $Author") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given Description parameter" {
+        $Description = "PowerShellGet test description"
+       
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($Description) | Should -BeTrue
+        $results -like ".DESCRIPTION*$Description" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given CompanyName parameter" {
+        $CompanyName =  "Microsoft"
+        $Description = "Test description"
+
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -CompanyName $CompanyName -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($CompanyName) | Should -BeTrue
+        $results.Contains(".COMPANYNAME $Companyname") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given Copyright parameter" {
+        $Copyright =  "(c) Test Corporation"
+        $Description = "Test description"
+
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Copyright $Copyright -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Copyright) | Should -BeTrue
+        $results.Contains(".COPYRIGHT $Copyright") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given RequiredModules parameter" {
+        $requiredModuleName = 'PackageManagement'
+        $requiredModuleVersion = '1.0.0.0'
+        $RequiredModules =  @(@{ModuleName = $requiredModuleName; ModuleVersion = $requiredModuleVersion })
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredModules $RequiredModules -Description $Description 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($requiredModuleName) | Should -BeTrue
+        $results.Contains($requiredModuleVersion) | Should -BeTrue
+        $results -like ".REQUIREDMODULES*$requiredModuleName*$requiredModuleVersion" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given ReleaseNotes parameter" {
+        $Description = "Test Description"
+        $ReleaseNotes = "Release notes for script."
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ReleaseNotes $ReleaseNotes -Description $Description 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($ReleaseNotes) | Should -BeTrue
+        $results -like ".RELEASENOTES*$ReleaseNotes" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given Tags parameter" {
+        $Description = "Test Description"
+        $Tag1 = "tag1"
+        $Tag2 = "tag2"
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Tags $Tag1, $Tag2 -Description $Description 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($Tag1) | Should -BeTrue
+        $results.Contains($Tag2) | Should -BeTrue
+        $results.Contains(".TAGS $Tag1 $Tag2") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given ProjectUri parameter" {
+        $Description = "Test Description"
+        $ProjectUri = "https://www.testprojecturi.com/"
+      
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ProjectUri $ProjectUri -Description $Description 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($ProjectUri) | Should -BeTrue
+        $results.Contains(".PROJECTURI $ProjectUri") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given LicenseUri parameter" {
+        $Description = "Test Description"
+        $LicenseUri = "https://www.testlicenseuri.com/"
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -LicenseUri $LicenseUri -Description $Description 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($LicenseUri) | Should -BeTrue
+        $results.Contains(".LICENSEURI $LicenseUri") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given IconUri parameter" {
+        $Description = "Test Description"
+        $IconUri = "https://www.testiconuri.com/"
+  
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -IconUri $IconUri -Description $Description 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($IconUri) | Should -BeTrue
+        $results.Contains(".ICONURI $IconUri") | Should -BeTrue
+    }
+
+    It "Create new .ps1 given ExternalModuleDependencies parameter" {
+        $Description = "Test Description"
+        $ExternalModuleDep1 = "ExternalModuleDep1"
+        $ExternalModuleDep2 = "ExternalModuleDep2"
+        $ExternalModuleDep1FileName = "ExternalModuleDep1.psm1"
+        $ExternalModuleDep2FileName = "ExternalModuleDep2.psm1"
+        $ExternalModuleDepPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $ExternalModuleDep1FileName
+        $ExternalModuleDepPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $ExternalModuleDep2FileName
+
+        $null = New-Item -Path $ExternalModuleDepPath1 -ItemType File -Force
+        $null = New-Item -Path $ExternalModuleDepPath2 -ItemType File -Force
+
+        # NOTE: you may need to add the -NestedModules parameter here as well
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ExternalModuleDependencies $ExternalModuleDep1, $ExternalModuleDep2 -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($ExternalModuleDep1) | Should -BeTrue
+        $results.Contains($ExternalModuleDep2) | Should -BeTrue
+        $results -like ".EXTERNALMODULEDEPENDENCIES*$ExternalModuleDep1*$ExternalModuleDep2" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given RequiredAssemblies parameter" {
+        $Description = "Test Description"
+        $RequiredAssembly1 = "RequiredAssembly1.dll"
+        $RequiredAssembly2 = "RequiredAssembly2.dll"
+        $RequiredAssemblyPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $RequiredAssembly1
+        $RequiredAssemblyPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $RequiredAssembly2
+
+        $null = New-Item -Path $RequiredAssemblyPath1 -ItemType File -Force
+        $null = New-Item -Path $RequiredAssemblyPath2 -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredAssemblies $RequiredAssembly1, $RequiredAssembly2 -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($RequiredAssembly1) | Should -BeTrue
+        $results.Contains($RequiredAssembly2) | Should -BeTrue
+        $results -like ".REQUIREDASSEMBLIES*$RequiredAssembly1*$RequiredAssembly2" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given NestedModules parameter" {
+        $Description = "Test Description"
+        $NestedModule1 = "NestedModule1"
+        $NestedModule2 = "NestedModule2"
+        $NestModuleFileName1 = "NestedModule1.dll"
+        $NestModuleFileName2 = "NestedModule2.dll"
+        $NestedModulePath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NestModuleFileName1
+        $NestedModulePath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NestModuleFileName2
+
+        $null = New-Item -Path $NestedModulePath1 -ItemType File -Force
+        $null = New-Item -Path $NestedModulePath2 -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -NestedModules $NestedModule1, $NestedModule2 -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NestedModule1) | Should -BeTrue
+        $results.Contains($NestedModule2) | Should -BeTrue
+        $results -like ".NESTEDMODULES*$NestedModule1*$NestedModule2" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given RequiredScripts parameter" {
+        $Description = "Test Description"
+        $RequiredScript1 = "NestedModule1.ps1"
+        $RequiredScript2 = "NestedModule2.ps1"
+        $RequiredScript1Path = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $RequiredScript1
+        $RequiredScript2Path = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $RequiredScript2
+
+        $null = New-Item -Path $RequiredScript1Path -ItemType File -Force
+        $null = New-Item -Path $RequiredScript2Path -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredScripts $RequiredScript1, $RequiredScript2 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($RequiredScript1) | Should -BeTrue
+        $results.Contains($RequiredScript2) | Should -BeTrue
+        $results -like ".REQUIREDSCRIPTS*$RequiredScript1*$RequiredScript2" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given ExternalScriptDependencies parameter" {
+        $Description = "Test Description"
+        $ExternalScriptDep1 = "ExternalScriptDep1.ps1"
+        $ExternalScriptDep2 = "ExternalScriptDep2.ps1"
+        $ExternalScriptDepPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $ExternalScriptDep1
+        $ExternalScriptDepPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $ExternalScriptDep2
+
+        $null = New-Item -Path $ExternalScriptDepPath1 -ItemType File -Force
+        $null = New-Item -Path $ExternalScriptDepPath2 -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ExternalModuleDependencies $ExternalModuleDep1, $ExternalModuleDep2 -Description $Description
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($ExternalModuleDep1) | Should -BeTrue
+        $results.Contains($ExternalModuleDep2) | Should -BeTrue
+        $results -like ".EXTERNALSCRIPTDEPENDENCIES*$ExternalScriptDep1*$ExternalScriptDep2" | Should -BeTrue
+    }
+
+    It "Create new .ps1 given PrivateData parameter" {
+        $Description = "Test Description"
+        $PrivateData = @{"PrivateDataEntry1" = "PrivateDataValue1"}
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -PrivateData $PrivateData -Description $Description 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($PrivateData) | Should -BeTrue
+        $results -like ".PRIVATEDATA*$PrivateData" | Should -BeTrue
+    }
+#>
+}
\ No newline at end of file
diff --git a/test/TestPSScriptInfo.Tests.ps1 b/test/TestPSScriptInfo.Tests.ps1
new file mode 100644
index 000000000..fa79f8bf9
--- /dev/null
+++ b/test/TestPSScriptInfo.Tests.ps1
@@ -0,0 +1,42 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+Import-Module "$psscriptroot\PSGetTestUtils.psm1" -Force
+
+Describe "Test Test-PSScriptFileInfo" {
+
+    BeforeAll {
+        $script:TempPath = Get-TempPath
+    }
+    BeforeEach {
+        # Create temp script path
+        $script:TempScriptPath = Join-Path $script:TempPath "PSGet_$(Get-Random)"
+        $null = New-Item -Path $script:TempScriptPath -ItemType Directory -Force
+  
+        $script:PSScriptInfoName = "PSGetTestScript"
+        $script:testPSScriptInfoPath = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath "$script:PSScriptInfoName.psd1"
+    }
+    AfterEach {
+        RemoveItem "$script:TempScriptPath"
+    }
+
+    ### TODO:  Add tests for -Force and -WhatIf if those parameters are applicable
+    <#
+    It "Test .ps1 file with minimal required fields" {    
+        $Description = "This is a test script"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Description $Description
+
+        Test-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+    }
+
+    It "Test .ps1 file with relative path" {
+        $RelativeCurrentPath = Get-Location
+        $ScriptFilePath = Join-Path -Path $relativeCurrentPath -ChildPath "$script:PSScriptInfoName.ps1"
+        $Description = "this is a test script"
+        New-PSScriptFileInfo -FilePath $ScriptFilePath -Description $Description
+
+        Test-PSScriptFileInfo -FilePath $ScriptFilePath | Should -BeTrue
+        Remove-Item -Path $ScriptFilePath
+    }
+    #>
+}
diff --git a/test/UpdatePSScriptInfo.Tests.ps1 b/test/UpdatePSScriptInfo.Tests.ps1
new file mode 100644
index 000000000..eb1450eaf
--- /dev/null
+++ b/test/UpdatePSScriptInfo.Tests.ps1
@@ -0,0 +1,415 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+Import-Module "$psscriptroot\PSGetTestUtils.psm1" -Force
+
+Describe "Test Update-PSScriptFileInfo" {
+
+    BeforeAll {
+        $script:TempPath = Get-TempPath
+    }
+    BeforeEach {
+        # Create temp script path
+        $script:TempScriptPath = Join-Path $script:TempPath "PSGet_$(Get-Random)"
+        $null = New-Item -Path $script:TempScriptPath -ItemType Directory -Force
+  
+        $script:PSScriptInfoName = "PSGetTestScript"
+        $script:testPSScriptInfoPath = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath "$script:PSScriptInfoName.psd1"
+    }
+    AfterEach {
+        RemoveItem "$script:TempScriptPath"
+    }
+
+    ### TODO:  Add tests for -Force and -WhatIf if those parameters are applicable
+<#
+    It "Update .ps1 file with relative path" {
+        $RelativeCurrentPath = Get-Location
+        $ScriptFilePath = Join-Path -Path $relativeCurrentPath -ChildPath "$script:PSScriptInfoName.ps1"
+        $OldDescription = "Old description for test script"
+        $NewDescription = "Old description for test script"
+        New-PSScriptFileInfo -FilePath $ScriptFilePath -Description $OldDescription
+        
+        Update-PSScriptFileInfo -FilePath $ScriptFilePath -Description $NewDescription
+
+        Test-PSScriptFileInfo -FilePath $ScriptFilePath | Should -BeTrue
+        Remove-Item -Path $ScriptFilePath
+    }
+
+    It "Update .ps1 given Version parameter" {
+        $Version =  "2.0.0.0"
+        $Description = "Test description"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Description $Description
+        
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Version $Version
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Version) | Should -BeTrue
+        $results.Contains(".VERSION $Version") | Should -BeTrue
+    }
+
+    It "Update .ps1 given prerelease version" {
+        $Version =  "2.0.0.0-alpha"
+        $Description = "Test description"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Description $Description
+        
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Version $Version
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Version) | Should -BeTrue
+        $results.Contains(".VERSION $Version") | Should -BeTrue
+    }
+
+    It "Should not update .ps1 with invalid version" {
+        $Version =  "4.0.0.0.0"
+        $Description = "Test description"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Description $Description
+        
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Version $Version -ErrorVariable err -ErrorAction SilentlyContinue
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeFalse   
+        $err.Count | Should -Not -Be 0
+        $err[0].FullyQualifiedErrorId | Should -BeExactly "VersionParseIntoNuGetVersion,Microsoft.PowerShell.PowerShellGet.Cmdlets.UpdatePSScriptFileInfo"
+    }
+
+    It "Update .ps1 given Guid parameter" {
+        $Guid = [guid]::NewGuid()
+        $Description = "Test description"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Guid $Guid
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Guid) | Should -BeTrue
+        $results.Contains(".GUID $Guid") | Should -BeTrue
+    }
+
+    It "Update .ps1 given Author parameter" {
+        $Author = "New Author" 
+        $Description = "Test description"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Author $Author
+
+        
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($Author) | Should -BeTrue
+        $results.Contains(".AUTHOR $Author") | Should -BeTrue
+    }
+
+    It "Update .ps1 given Description parameter" {
+        $OldDescription = "Old description for test script."
+        $NewDescription = "New description for test script."
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Description $OldDescription
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Description $NewDescription
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewDescription) | Should -BeTrue
+        $results -like ".DESCRIPTION*$NewDescription" | Should -BeTrue
+    }
+
+    It "Update .ps1 given CompanyName parameter" {
+        $OldCompanyName =  "Old company name"
+        $NewCompanyName =  "New company name"
+        $Description = "Test description"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -CompanyName $OldCompanyName -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -CompanyName $NewCompanyName
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($NewCompanyName) | Should -BeTrue
+        $results.Contains(".COMPANYNAME $NewCompanyName") | Should -BeTrue
+    }
+
+    It "Update .ps1 given Copyright parameter" {
+        $OldCopyright =  "(c) Old Test Corporation"
+        $NewCopyright =  "(c) New Test Corporation"
+        $Description = "Test description"
+        New-PSScriptFileInfo -FilePath  $script:testPSScriptInfoPath -Copyright $OldCopyright -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Copyright $NewCopyright
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testPSScriptInfoPath -Raw
+        $results.Contains($NewCopyright) | Should -BeTrue
+        $results.Contains(".COPYRIGHT $NewCopyright") | Should -BeTrue
+    }
+
+    It "Update .ps1 given RequiredModules parameter" {
+        $RequiredModuleName = 'PackageManagement'
+        $OldrequiredModuleVersion = '1.0.0.0'
+        $OldRequiredModules =  @(@{ModuleName = $RequiredModuleName; ModuleVersion = $OldrequiredModuleVersion })
+        $NewrequiredModuleVersion = '2.0.0.0'
+        $NewRequiredModules =  @(@{ModuleName = $RequiredModuleName; ModuleVersion = $NewrequiredModuleVersion })
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath  -RequiredModules $OldRequiredModules -Description $Description 
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredModules $NewRequiredModules
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($RequiredModuleName) | Should -BeTrue
+        $results.Contains($NewrequiredModuleVersion) | Should -BeTrue
+        $results -like ".REQUIREDMODULES*$RequiredModuleName*$NewrequiredModuleVersion" | Should -BeTrue
+    }
+
+    It "Update .ps1 given ReleaseNotes parameter" {
+        $Description = "Test Description"
+        $OldReleaseNotes = "Old release notes for script."
+        $NewReleaseNotes = "New release notes for script."
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ReleaseNotes $OldReleaseNotes -Description $Description 
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ReleaseNotes $NewReleaseNotes
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewReleaseNotes) | Should -BeTrue
+        $results -like ".RELEASENOTES*$NewReleaseNotes" | Should -BeTrue
+    }
+
+    It "Update .ps1 given Tags parameter" {
+        $Description = "Test Description"
+        $OldTag1 = "Tag1"
+        $OldTag2 = "Tag2"
+        $NewTag1 = "NewTag1"
+        $NewTag2 = "NewTag2"
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Tags $OldTag1, $OldTag2 -Description $Description 
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -Tags $NewTag1, $NewTag2
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewTag1) | Should -BeTrue
+        $results.Contains($NewTag2) | Should -BeTrue
+        $results.Contains(".TAGS $NewTag1 $NewTag2") | Should -BeTrue
+    }
+
+    It "Update .ps1 given ProjectUri parameter" {
+        $Description = "Test Description"
+        $OldProjectUri = "https://www.oldtestprojecturi.com/"
+        $NewProjectUri = "https://www.newtestprojecturi.com/"
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ProjectUri $OldProjectUri -Description $Description 
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ProjectUri $NewProjectUri
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewProjectUri) | Should -BeTrue
+        $results.Contains(".PROJECTURI $NewProjectUri") | Should -BeTrue
+    }
+
+    It "Update .ps1 given LicenseUri parameter" {
+        $Description = "Test Description"
+        $OldLicenseUri = "https://www.oldtestlicenseuri.com/"
+        $NewLicenseUri = "https://www.newtestlicenseuri.com/"
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -LicenseUri $OldLicenseUri -Description $Description 
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -LicenseUri $NewLicenseUri
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewLicenseUri) | Should -BeTrue
+        $results.Contains(".LICENSEURI $NewLicenseUri") | Should -BeTrue
+    }
+
+    It "Update .ps1 given IconUri parameter" {
+        $Description = "Test Description"
+        $OldIconUri = "https://www.oldtesticonuri.com/"
+        $NewIconUri = "https://www.newtesticonuri.com/"
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -IconUri $OldIconUri -Description $Description 
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -IconUri $NewIconUri
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewIconUri) | Should -BeTrue
+        $results.Contains(".ICONURI $NewIconUri") | Should -BeTrue
+    }
+
+    It "Update .ps1 given ExternalModuleDependencies parameter" {
+        $Description = "Test Description"
+        $OldExternalModuleDep1 = "OldExternalModuleDep1"
+        $OldExternalModuleDep2 = "OldExternalModuleDep2"
+        $OldExternalModuleDep1FileName = "OldExternalModuleDep1.psm1"
+        $OldExternalModuleDep2FileName = "OldExternalModuleDep2.psm1"
+        $OldExternalModuleDepPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldExternalModuleDep1FileName
+        $OldExternalModuleDepPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldExternalModuleDep2FileName
+        $null = New-Item -Path $OldExternalModuleDepPath1 -ItemType File -Force
+        $null = New-Item -Path $OldExternalModuleDepPath2 -ItemType File -Force
+
+        $NewExternalModuleDep1 = "NewExternalModuleDep1"
+        $NewExternalModuleDep2 = "NewExternalModuleDep2"
+        $NewExternalModuleDep1FileName = "NewExternalModuleDep1.psm1"
+        $NewExternalModuleDep2FileName = "NewExternalModuleDep2.psm1"
+        $NewExternalModuleDepPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewExternalModuleDep1FileName
+        $NewExternalModuleDepPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewExternalModuleDep2FileName
+        $null = New-Item -Path $NewExternalModuleDepPath1 -ItemType File -Force
+        $null = New-Item -Path $NewExternalModuleDepPath2 -ItemType File -Force
+
+        # NOTE: you may need to add the -NestedModules parameter here as well
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ExternalModuleDependencies $OldExternalModuleDep1, $OldExternalModuleDep2 -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ExternalModuleDependencies $NewExternalModuleDep1, $NewExternalModuleDep2
+        
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewExternalModuleDep1) | Should -BeTrue
+        $results.Contains($NewExternalModuleDep2) | Should -BeTrue
+        $results -like ".EXTERNALMODULEDEPENDENCIES*$NewExternalModuleDep1*$NewExternalModuleDep2" | Should -BeTrue
+    }
+
+    It "Update .ps1 given RequiredAssemblies parameter" {
+        $Description = "Test Description"
+        $OldRequiredAssembly1 = "OldRequiredAssembly1.dll"
+        $OldRequiredAssembly2 = "OldRequiredAssembly2.dll"
+        $OldRequiredAssemblyPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldRequiredAssembly1
+        $OldRequiredAssemblyPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldRequiredAssembly2
+        $null = New-Item -Path $OldRequiredAssemblyPath1 -ItemType File -Force
+        $null = New-Item -Path $OldRequiredAssemblyPath2 -ItemType File -Force
+
+        $NewRequiredAssembly1 = "NewRequiredAssembly1.dll"
+        $NewRequiredAssembly2 = "NewRequiredAssembly2.dll"
+        $NewRequiredAssemblyPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewRequiredAssembly1
+        $NewRequiredAssemblyPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewRequiredAssembly2
+        $null = New-Item -Path $NewRequiredAssemblyPath1 -ItemType File -Force
+        $null = New-Item -Path $NewRequiredAssemblyPath2 -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredAssemblies $OldRequiredAssembly1, $OldRequiredAssembly2 -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredAssemblies $NewRequiredAssembly1, $NewRequiredAssembly2
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewRequiredAssembly1) | Should -BeTrue
+        $results.Contains($NewRequiredAssembly2) | Should -BeTrue
+        $results -like ".REQUIREDASSEMBLIES*$NewRequiredAssembly1*$NewRequiredAssembly2" | Should -BeTrue
+    }
+
+    It "Update .ps1 given NestedModules parameter" {
+        $Description = "Test Description"
+        $OldNestedModule1 = "OldNestedModule1"
+        $OldNestedModule2 = "OldNestedModule2"
+        $OldNestModuleFileName1 = "OldNestedModule1.dll"
+        $OldNestModuleFileName2 = "OldNestedModule2.dll"
+        $OldNestedModulePath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldNestModuleFileName1
+        $OldNestedModulePath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldNestModuleFileName2
+        $null = New-Item -Path $OldNestedModulePath1 -ItemType File -Force
+        $null = New-Item -Path $OldNestedModulePath2 -ItemType File -Force
+
+        $NewNestedModule1 = "NewNestedModule1"
+        $NewNestedModule2 = "NewNestedModule2"
+        $NewNestModuleFileName1 = "NewNestedModule1.dll"
+        $NewNestModuleFileName2 = "NewNestedModule2.dll"
+        $NewNestedModulePath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewNestModuleFileName1
+        $NewNestedModulePath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewNestModuleFileName2
+        $null = New-Item -Path $NewNestedModulePath1 -ItemType File -Force
+        $null = New-Item -Path $NewNestedModulePath2 -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -NestedModules $OldNestedModule1, $OldNestedModule2 -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -NestedModules $NewNestedModule1, $NewNestedModule2
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewNestedModule1) | Should -BeTrue
+        $results.Contains($NewNestedModule2) | Should -BeTrue
+        $results -like ".NESTEDMODULES*$NewNestedModule1*$NewNestedModule2" | Should -BeTrue
+    }
+
+    It "Update .ps1 given RequiredScripts parameter" {
+        $Description = "Test Description"
+        $OldRequiredScript1 = "OldNestedModule1.ps1"
+        $OldRequiredScript2 = "OldNestedModule2.ps1"
+        $OldRequiredScript1Path = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldRequiredScript1
+        $OldRequiredScript2Path = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldRequiredScript2
+        $null = New-Item -Path $OldRequiredScript1Path -ItemType File -Force
+        $null = New-Item -Path $OldRequiredScript2Path -ItemType File -Force
+        
+        $NewRequiredScript1 = "NewNestedModule1.ps1"
+        $NewRequiredScript2 = "NewNestedModule2.ps1"
+        $NewRequiredScript1Path = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewRequiredScript1
+        $NewRequiredScript2Path = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewRequiredScript2
+        $null = New-Item -Path $NewRequiredScript1Path -ItemType File -Force
+        $null = New-Item -Path $NewRequiredScript2Path -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredScripts $OldRequiredScript1, $OldRequiredScript2 -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -RequiredScripts $NewRequiredScript1, $NewRequiredScript2
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewRequiredScript1) | Should -BeTrue
+        $results.Contains($NewRequiredScript2) | Should -BeTrue
+        $results -like ".REQUIREDSCRIPTS*$NewRequiredScript1*$NewRequiredScript2" | Should -BeTrue
+    }
+
+    It "Update .ps1 given ExternalScriptDependencies parameter" {
+        $Description = "Test Description"
+        $OldExternalScriptDep1 = "OldExternalScriptDep1.ps1"
+        $OldExternalScriptDep2 = "OldExternalScriptDep2.ps1"
+        $OldExternalScriptDepPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldExternalScriptDep1
+        $OldExternalScriptDepPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $OldExternalScriptDep2
+        $null = New-Item -Path $OldExternalScriptDepPath1 -ItemType File -Force
+        $null = New-Item -Path $OldExternalScriptDepPath2 -ItemType File -Force
+
+        $NewExternalScriptDep1 = "NewExternalScriptDep1.ps1"
+        $NewExternalScriptDep2 = "NewExternalScriptDep2.ps1"
+        $NewExternalScriptDepPath1 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewExternalScriptDep1
+        $NewExternalScriptDepPath2 = Microsoft.PowerShell.Management\Join-Path -Path $script:TempScriptPath -ChildPath $NewExternalScriptDep2
+        $null = New-Item -Path $NewExternalScriptDepPath1 -ItemType File -Force
+        $null = New-Item -Path $NewExternalScriptDepPath2 -ItemType File -Force
+
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ExternalModuleDependencies $OldExternalModuleDep1, $OldExternalModuleDep2 -Description $Description
+
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -ExternalModuleDependencies $NewExternalModuleDep1, $NewExternalModuleDep2
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewExternalModuleDep1) | Should -BeTrue
+        $results.Contains($NewExternalModuleDep2) | Should -BeTrue
+        $results -like ".EXTERNALSCRIPTDEPENDENCIES*$NewExternalModuleDep1*$NewExternalModuleDep2" | Should -BeTrue
+    }
+
+    It "Update .ps1 given PrivateData parameter" {
+        $Description = "Test Description"
+        $OldPrivateData = @{"OldPrivateDataEntry1" = "OldPrivateDataValue1"}
+        $NewPrivateData = @{"NewPrivateDataEntry1" = "NewPrivateDataValue1"}
+        New-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -PrivateData $OldPrivateData -Description $Description 
+        
+        Update-PSScriptFileInfo -FilePath $script:testPSScriptInfoPath -PrivateData $NewPrivateData 
+
+        Test-Path -FilePath $script:testPSScriptInfoPath | Should -BeTrue
+        $results = Get-Content -Path $script:testManifestPath -Raw
+        $results.Contains($NewPrivateData) | Should -BeTrue
+        $results -like ".PRIVATEDATA*$NewPrivateData" | Should -BeTrue
+    }
+
+    It "Update signed script when using RemoveSignature parameter" {
+        $scriptName = "ScriptWithSignature.ps1"
+        $scriptFilePath = Join-Path $script:testScriptsFolderPath -ChildPath $scriptName
+
+        # use a copy of the signed script file so we can re-use for other tests
+        $null = Copy-Item -Path $scriptFilePath -Destination $TestDrive
+        $tmpScriptFilePath = Join-Path -Path $TestDrive -ChildPath $scriptName
+
+        Update-PSScriptFileInfo -FilePath $tmpScriptFilePath -Version "2.0.0.0" -RemoveSignature
+        Test-PSScriptFileInfo -FilePath $tmpScriptFilePath | Should -Be $true
+    }
+    
+    It "Throw error when attempting to update a signed script without -RemoveSignature parameter" {
+        $scriptName = "ScriptWithSignature.ps1"
+        $scriptFilePath = Join-Path $script:testScriptsFolderPath -ChildPath $scriptName
+
+        # use a copy of the signed script file so we can re-use for other tests
+        $null = Copy-Item -Path $scriptFilePath -Destination $TestDrive
+        $tmpScriptFilePath = Join-Path -Path $TestDrive -ChildPath $scriptName
+
+        { Update-PSScriptFileInfo -FilePath $tmpScriptFilePath -Version "2.0.0.0" } | Should -Throw -ErrorId "ScriptToBeUpdatedContainsSignature,Microsoft.PowerShell.PowerShellGet.Cmdlets.UpdatePSScriptFileInfo"
+    }
+#>
+}
\ No newline at end of file