diff --git a/test/powershell/Sort-Object.Tests.ps1 b/test/powershell/Sort-Object.Tests.ps1
index 9395e957c..4ed3ef43d 100644
--- a/test/powershell/Sort-Object.Tests.ps1
+++ b/test/powershell/Sort-Object.Tests.ps1
@@ -20,3 +20,205 @@
     }
 }
 
+Describe "Sort-Object DRT Unit Tests" -Tags DRT{
+	It "Sort-Object with object array should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="Eight"; "LastName"="Eight"; "YearsInMS"=8}
+		$employee2 = [pscustomobject]@{"FirstName"="Eight"; "YearsInMS"=$null}
+		$employee3 = [pscustomobject]@{"FirstName"="Minus"; "LastName"="Two"; "YearsInMS"=-2}
+		$employee4 = [pscustomobject]@{"FirstName"="One"; "LastName"="One"; "YearsInMS"=1}
+		$employees = @($employee1,$employee2,$employee3,$employee4)
+		$results = $employees | Sort-Object -Property YearsInMS
+		
+		$results[0].FirstName | Should Be "Minus"
+		$results[0].LastName | Should Be "Two"
+		$results[0].YearsInMS | Should Be -2
+		
+		$results[1].FirstName | Should Be "Eight"
+		$results[1].YearsInMS | Should BeNullOrEmpty
+		
+		$results[2].FirstName | Should Be "One"
+		$results[2].LastName | Should Be "One"
+		$results[2].YearsInMS | Should Be 1
+		
+		$results[3].FirstName | Should Be "Eight"
+		$results[3].LastName | Should Be "Eight"
+		$results[3].YearsInMS | Should Be 8
+	}
+	
+	It "Sort-Object with Non Conflicting Order Entry Keys should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=2}
+		$employees = @($employee1,$employee2,$employee3)
+		$ht = @{"e"="YearsInMS"; "descending"=$false; "ascending"=$true}
+		$results = $employees | Sort-Object -Property $ht -Descending
+		
+		$results[0] | Should Be $employees[2]
+		$results[1] | Should Be $employees[0]
+		$results[2] | Should Be $employees[1]
+	}
+	
+	It "Sort-Object with Conflicting Order Entry Keys should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=2}
+		$employees = @($employee1,$employee2,$employee3)
+		$ht = @{"e"="YearsInMS"; "descending"=$false; "ascending"=$false}
+		$results = $employees | Sort-Object -Property $ht -Descending
+		
+		$results[0] | Should Be $employees[1]
+		$results[1] | Should Be $employees[0]
+		$results[2] | Should Be $employees[2]
+	}
+	
+	It "Sort-Object with One Order Entry Key should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=2}
+		$employees = @($employee1,$employee2,$employee3)
+		$ht = @{"e"="YearsInMS"; "descending"=$false}
+		$results = $employees | Sort-Object -Property $ht -Descending
+		
+		$results[0] | Should Be $employees[2]
+		$results[1] | Should Be $employees[0]
+		$results[2] | Should Be $employees[1]
+	}
+	
+	It "Sort-Object with HistoryInfo object should work"{
+		Add-Type -TypeDefinition "public enum PipelineState{NotStarted,Running,Stopping,Stopped,Completed,Failed,Disconnected}"
+		
+		$historyInfo1 = [pscustomobject]@{"PipelineId"=1; "Cmdline"="cmd3"; "Status"=[PipelineState]::Completed; "StartTime" = [DateTime]::Now;"EndTime" = [DateTime]::Now.AddSeconds(5.0);}
+		$historyInfo2 = [pscustomobject]@{"PipelineId"=2; "Cmdline"="cmd1"; "Status"=[PipelineState]::Completed; "StartTime" = [DateTime]::Now;"EndTime" = [DateTime]::Now.AddSeconds(5.0);}
+		$historyInfo3 = [pscustomobject]@{"PipelineId"=3; "Cmdline"="cmd2"; "Status"=[PipelineState]::Completed; "StartTime" = [DateTime]::Now;"EndTime" = [DateTime]::Now.AddSeconds(5.0);}
+		
+		$historyInfos = @($historyInfo1,$historyInfo2,$historyInfo3)
+		
+		$results = $historyInfos | Sort-Object
+		
+		$results[0] | Should Be $historyInfos[0]
+		$results[1] | Should Be $historyInfos[1]
+		$results[2] | Should Be $historyInfos[2]
+	}
+	
+	It "Sort-Object with Non Existing And Null Script Property should work"{
+		$n = new-object microsoft.powershell.commands.newobjectcommand
+		$d = new-object microsoft.powershell.commands.newobjectcommand
+		$d.TypeName = 'Deetype'
+		$b = new-object microsoft.powershell.commands.newobjectcommand
+		$b.TypeName = 'btype'
+		$a = new-object microsoft.powershell.commands.newobjectcommand
+		$a.TypeName = 'atype'
+		$results = $n, $d, $b, 'b', $a | Sort-Object -proper {$_.TypeName}
+		$results.Count | Should Be 5
+		$results[2] | Should Be $a
+		$results[3] | Should Be $b
+		$results[4] | Should Be $d
+		#results[0] and [1] can be any order
+	}
+	
+	It "Sort-Object with Non Existing And Null Property should work"{
+		$n = new-object microsoft.powershell.commands.newobjectcommand
+		$n.TypeName = $null
+		$d = new-object microsoft.powershell.commands.newobjectcommand
+		$d.TypeName = 'Deetype'
+		$b = new-object microsoft.powershell.commands.newobjectcommand
+		$b.TypeName = 'btype'
+		$a = new-object microsoft.powershell.commands.newobjectcommand
+		$a.TypeName = 'atype'
+		$results = $n, $d, $b, 'b', $a | Sort-Object -prop TypeName
+		$results.Count | Should Be 5
+		$results[0] | Should Be $n
+		$results[1] | Should Be $a
+		$results[2] | Should Be $b
+		$results[3] | Should Be $d
+		$results[4] | Should Be 'b'
+	}
+	
+	It "Sort-Object with Non Case-Sensitive Unique should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=12}
+		$employees = @($employee1,$employee2,$employee3)
+		$results = $employees | Sort-Object -Property "LastName" -Descending -Unique
+		
+		$results[0] | Should Be $employees[2]
+		$results[1] | Should Be $employees[1]
+		$results[2] | Should BeNullOrEmpty
+	}
+	
+	It "Sort-Object with Case-Sensitive Unique should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=12}
+		$employees = @($employee1,$employee2,$employee3)
+		$results = $employees | Sort-Object -Property "LastName","FirstName" -Descending -Unique -CaseSensitive
+		
+		$results[0] | Should Be $employees[2]
+		$results[1] | Should Be $employees[0]
+		$results[2] | Should Be $employees[1]
+	}
+	
+	It "Sort-Object with Two Order Entry Keys should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=2}
+		$employees = @($employee1,$employee2,$employee3)
+		$ht1 = @{"expression"="LastName"; "ascending"=$false}
+		$ht2 = @{"expression"="FirstName"; "ascending"=$true}
+		$results = $employees | Sort-Object -Property @($ht1,$ht2) -Descending
+		
+		$results[0] | Should Be $employees[2]
+		$results[1] | Should Be $employees[1]
+		$results[2] | Should Be $employees[0]
+	}
+	
+	It "Sort-Object with -Descending:$false and Two Order Entry Keys should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=12}
+		$employees = @($employee1,$employee2,$employee3)
+		$results = $employees | Sort-Object -Property "LastName","FirstName" -Descending:$false
+		
+		$results[0] | Should Be $employees[1]
+		$results[1] | Should Be $employees[0]
+		$results[2] | Should Be $employees[2]
+	}
+	
+	It "Sort-Object with -Descending and Two Order Entry Keys should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=12}
+		$employees = @($employee1,$employee2,$employee3)
+		$results = $employees | Sort-Object -Property "LastName","FirstName" -Descending
+		
+		$results[0] | Should Be $employees[2]
+		$results[1] | Should Be $employees[0]
+		$results[2] | Should Be $employees[1]
+	}
+	
+	It "Sort-Object with Two Order Entry Keys with asc=true should work"{
+		$employee1 = [pscustomobject]@{"FirstName"="john"; "LastName"="smith"; "YearsInMS"=5}
+		$employee2 = [pscustomobject]@{"FirstName"="joesph"; "LastName"="smith"; "YearsInMS"=15}
+		$employee3 = [pscustomobject]@{"FirstName"="john"; "LastName"="smyth"; "YearsInMS"=12}
+		$employees = @($employee1,$employee2,$employee3)
+		$ht1 = @{"e"="FirstName"; "asc"=$true}
+		$ht2 = @{"e"="LastName";}
+		$results = $employees | Sort-Object -Property @($ht1,$ht2) -Descending
+		
+		$results[0] | Should Be $employees[1]
+		$results[1] | Should Be $employees[2]
+		$results[2] | Should Be $employees[0]
+	}
+	
+	It "Sort-Object with Descending No Property should work"{
+		$employee1 = 1
+		$employee2 = 2
+		$employee3 = 3
+		$employees = @($employee1,$employee2,$employee3)
+		$results = $employees | Sort-Object -Descending
+		
+		$results[0] | Should Be 3
+		$results[1] | Should Be 2
+		$results[2] | Should Be 1
+	}
+}
\ No newline at end of file