diff --git a/test/powershell/Out-File.Tests.ps1 b/test/powershell/Out-File.Tests.ps1
index e2ca09c49..c3dafc914 100644
--- a/test/powershell/Out-File.Tests.ps1
+++ b/test/powershell/Out-File.Tests.ps1
@@ -1,3 +1,22 @@
+Describe "Out-File DRT Unit Tests" -Tags DRT{
+    It "Should be able to write the contens into a file with -pspath" {
+        $tempFile = "ExposeBug928965"
+        { 1 | Out-File -PSPath $tempFile } | Should Not Throw
+        $fileContents = Get-Content $tempFile
+        $fileContents | Should be 1
+        Remove-Item $tempFile -Force
+    }
+
+    It "Should be able to write the contens into a file with -pspath" {
+        $tempFile = "outfileAppendTest.txt"
+        { 'This is first line.' | out-file $tempFile } | Should Not Throw
+        { 'This is second line.' | out-file -append $tempFile } | Should Not Throw
+        $tempFile |Should Contain "first"
+        $tempFile |Should Contain "second"
+        Remove-Item $tempFile -Force
+    }
+}
+
 Describe "Out-File" {
     $expectedContent = "some test text"
     $inObject = New-Object psobject -Property @{text=$expectedContent}
diff --git a/test/powershell/Out-String.Tests.ps1 b/test/powershell/Out-String.Tests.ps1
index 5f32cc69b..841a4ffe6 100644
--- a/test/powershell/Out-String.Tests.ps1
+++ b/test/powershell/Out-String.Tests.ps1
@@ -1,3 +1,15 @@
+Describe "Out-String DRT Unit Tests" -Tags DRT{
+
+    It "check display of properties with names containing wildcard characters" {
+        $results = new-object psobject | add-member -passthru noteproperty 'name with square brackets: [0]' 'myvalue' | out-string
+        $results.Length | Should BeGreaterThan 1
+        $results.GetType() | Should Be string
+        $results.Contains("myvalue") | Should Be $true
+        $results.Contains("name with square brackets: [0]") | Should Be $true
+    }
+
+}
+
 Describe "Out-String" {
     $nl = [Environment]::NewLine
 
diff --git a/test/powershell/Write-Error.Tests.ps1 b/test/powershell/Write-Error.Tests.ps1
index 51687df5b..57f1b299d 100644
--- a/test/powershell/Write-Error.Tests.ps1
+++ b/test/powershell/Write-Error.Tests.ps1
@@ -1,3 +1,75 @@
+Describe "Write-Error DRT Unit Tests" -Tags DRT{
+    It "Should be works with command: write-error myerrortext" {
+        Write-Error myerrortext -ErrorAction SilentlyContinue 
+        $Error[0] | Should Not BeNullOrEmpty
+        $Error[0].GetType().Name | Should Be 'ErrorRecord'
+        
+        #Exception verification
+        $Error[0].Exception.GetType().Name | Should Be 'WriteErrorException'
+        $Error[0].Exception.Message | Should Be 'myerrortext'
+        $Error[0].Exception.Data.Count | Should Be 0
+        $Error[0].Exception.InnerException | Should BeNullOrEmpty 
+        
+        #ErrorCategoryInfo verification
+        $Error[0].CategoryInfo | Should Not BeNullOrEmpty
+        $Error[0].CategoryInfo.Category | Should Be 'NotSpecified'
+        $Error[0].CategoryInfo.Activity | Should Be 'Write-Error'
+        $Error[0].CategoryInfo.Reason | Should Be 'WriteErrorException'
+        $Error[0].CategoryInfo.TargetName | Should BeNullOrEmpty
+        $Error[0].CategoryInfo.TargetType | Should BeNullOrEmpty
+        $Error[0].CategoryInfo.GetMessage() | Should Be 'NotSpecified: (:) [Write-Error], WriteErrorException'
+
+        #ErrorDetails verification
+        $Error[0].ErrorDetails | Should BeNullOrEmpty
+
+        #FullyQualifiedErrorId verification 
+        $Error[0].FullyQualifiedErrorId | Should Be 'Microsoft.PowerShell.Commands.WriteErrorException'
+
+        #InvocationInfo verification
+        $Error[0].InvocationInfo | Should Not BeNullOrEmpty
+        $Error[0].InvocationInfo.MyCommand.Name | Should BeNullOrEmpty     
+    }
+
+    #Skip with issue #846
+    It "Should be works with all parameters" -Skip:$true { 
+        $exception = New-Object -TypeName System.ArgumentNullException -ArgumentList paramname 
+        Write-Error -Message myerrortext -Exception $exception -ErrorId myerrorid -Category syntaxerror -TargetObject TargetObject -CategoryActivity myactivity -CategoryReason myreason -CategoryTargetName mytargetname -CategoryTargetType mytargettype -RecommendedAction myrecommendedaction -ErrorAction SilentlyContinue
+        $Error[0] | Should Not BeNullOrEmpty
+        $Error[0].GetType().Name | Should Be 'ErrorRecord'
+
+        #Exception verification
+        $Error[0].Exception | Should Not BeNullOrEmpty
+        $Error[0].Exception.GetType().Name | Should Be 'ArgumentNullException'        
+        $Error[0].Exception.ParamName | Should Be 'paramname'
+        $Error[0].Exception.Data.Count | Should Be 0
+        $Error[0].Exception.InnerException | Should BeNullOrEmpty  
+        
+        #TargetObject verification 
+        $Error[0].TargetObject | Should Be 'TargetObject'
+
+        #FullyQualifiedErrorId verification
+        $Error[0].FullyQualifiedErrorId | Should Be 'myerrorid'
+
+        #ErrorCategoryInfo verification
+        $Error[0].CategoryInfo | Should Not BeNullOrEmpty
+        $Error[0].CategoryInfo.Category | Should Be 'SyntaxError'
+        $Error[0].CategoryInfo.Activity | Should Be 'myactivity'
+        $Error[0].CategoryInfo.Reason | Should Be 'myreason'
+        $Error[0].CategoryInfo.TargetName | Should Be 'mytargetname'
+        $Error[0].CategoryInfo.TargetType | Should Be 'mytargettype'
+        $Error[0].CategoryInfo.GetMessage() | Should Be 'SyntaxError: (mytargetname:mytargettype) [myactivity], myreason'
+
+        #ErrorDetails verification
+        $Error[0].ErrorDetails | Should Not BeNullOrEmpty
+        $Error[0].ErrorDetails.Message | Should Be 'myerrortext'
+        $Error[0].ErrorDetails.RecommendedAction | Should Be 'myrecommendedaction'
+
+        #InvocationInfo verification
+        $Error[0].InvocationInfo | Should Not BeNullOrEmpty
+        $Error[0].InvocationInfo.MyCommand.Name | Should BeNullOrEmpty  
+    }
+}
+
 Describe "Write-Error" {
     It "Should be able to throw" {
 	Write-Error "test throw" -ErrorAction SilentlyContinue | Should Throw