diff --git a/DSCResources/MSFT_xVMSwitch/MSFT_xVMSwitch.psm1 b/DSCResources/MSFT_xVMSwitch/MSFT_xVMSwitch.psm1
index 058c12c..bd62371 100644
--- a/DSCResources/MSFT_xVMSwitch/MSFT_xVMSwitch.psm1
+++ b/DSCResources/MSFT_xVMSwitch/MSFT_xVMSwitch.psm1
@@ -228,48 +228,54 @@ function Test-TargetResource
             # If switch should be present, check the switch type
             if($Ensure -eq 'Present')
             {
-                # If the BandwidthReservsationMode is correct, or if $switch.BandwidthReservationMode is $null which means it isn't supported on the OS
-                Write-Verbose -Message "Checking if Switch $Name has correct BandwidthReservationMode ..."
-                if($switch.BandwidthReservationMode -eq $BandwidthReservationMode -or $switch.BandwidthReservationMode -eq $null)
+                ## Only check the BandwidthReservationMode if specified
+                if($PSBoundParameters.ContainsKey('BandwidthReservationMode'))
                 {
-                    Write-Verbose -Message "Switch $Name has correct BandwidthReservationMode or it does not apply to this OS"
+                    # If the BandwidthReservationMode is correct, or if $switch.BandwidthReservationMode is $null which means it isn't supported on the OS
+                    Write-Verbose -Message "Checking if Switch $Name has correct BandwidthReservationMode ..."
+                    if($switch.BandwidthReservationMode -eq $BandwidthReservationMode -or $switch.BandwidthReservationMode -eq $null)
+                    {
+                        Write-Verbose -Message "Switch $Name has correct BandwidthReservationMode or it does not apply to this OS"
+                    }
+                    else
+                    {
+                        Write-Verbose -Message "Switch $Name does not have correct BandwidthReservationMode "
+                        return $false
+                    }
+                }
 
-                    # If switch is the external type, check additional propeties
-                    if($switch.SwitchType -eq 'External')
+                # If switch is the external type, check additional propeties
+                if($switch.SwitchType -eq 'External')
+                {
+                    Write-Verbose -Message "Checking if Switch $Name has correct NetAdapterInterface ..."
+                    if((Get-NetAdapter -Name $NetAdapterName -ErrorAction SilentlyContinue).InterfaceDescription -ne $switch.NetAdapterInterfaceDescription)
                     {
-                        Write-Verbose -Message "Checking if Switch $Name has correct NetAdapterInterface ..."
-                        if((Get-NetAdapter -Name $NetAdapterName -ErrorAction SilentlyContinue).InterfaceDescription -ne $switch.NetAdapterInterfaceDescription)
+                        return $false
+                    }
+                    else
+                    {
+                        Write-Verbose -Message "Switch $Name has correct NetAdapterInterface"
+                    }
+                
+                    if($PSBoundParameters.ContainsKey("AllowManagementOS"))
+                    {
+                        Write-Verbose -Message "Checking if Switch $Name has AllowManagementOS set correctly..."
+                        if(($switch.AllowManagementOS -ne $AllowManagementOS))
                         {
                             return $false
                         }
                         else
                         {
-                            Write-Verbose -Message "Switch $Name has correct NetAdapterInterface"
-                        }
-                    
-                        if($PSBoundParameters.ContainsKey("AllowManagementOS"))
-                        {
-                            Write-Verbose -Message "Checking if Switch $Name has AllowManagementOS set correctly..."
-                            if(($switch.AllowManagementOS -ne $AllowManagementOS))
-                            {
-                                return $false
-                            }
-                            else
-                            {
-                                Write-Verbose -Message "Switch $Name has AllowManagementOS set correctly"
-                            }
+                            Write-Verbose -Message "Switch $Name has AllowManagementOS set correctly"
                         }
-                        return $true
-                    }
-                    else
-                    {
-                        return $true
                     }
+                    return $true
                 }
                 else
                 {
-                    return $false
+                    return $true
                 }
+                
             }
             # If switch should be absent, but is there, return $false
             else
diff --git a/README.md b/README.md
index 5f587e7..ab69e4b 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,7 @@ Please see the Examples section for more details.
 
 * MSFT_xVMHyperV: Fixed bug causing Test-TargetResource to fail when VM had snapshots.
 * MSFT_xVMHyperV: Adds localization support.
+* MSFT_xVMSwitch: Fixes bug where virtual switches are duplicated when BandwidthReservationMode is not specified.
 
 ### 3.3.0.0
 
diff --git a/Tests/MSFT_xVMSwitch/xVMSwitch_BandwidthReservationMode.Tests.ps1 b/Tests/MSFT_xVMSwitch/xVMSwitch_BandwidthReservationMode.Tests.ps1
index cb9d1c6..62bb24d 100644
--- a/Tests/MSFT_xVMSwitch/xVMSwitch_BandwidthReservationMode.Tests.ps1
+++ b/Tests/MSFT_xVMSwitch/xVMSwitch_BandwidthReservationMode.Tests.ps1
@@ -278,6 +278,12 @@ Describe 'xVMSwitch' {
                 $targetResource = Test-TargetResource -Name 'SomeSwitch' -BandwidthReservationMode 'NA' -Type 'External' -NetAdapterName 'SomeNIC' -Ensure 'Present' -AllowManagementOS $true
                 $targetResource | Should Be $true
             }
+            
+            It 'Passes when "BandwidthReservationMode" does not match but is not specified (#48)' {
+                $global:mockedVMSwitch = New-MockedVMSwitch -Name 'SomeSwitch' -BandwidthReservationMode 'Absolute'
+                $targetResource = Test-TargetResource -Name 'SomeSwitch' -Type 'Internal' -Ensure 'Present'
+                $targetResource | Should Be $true
+            }
         }