diff --git a/Tests/Functions/Move-JiraVersion.Unit.Tests.ps1 b/Tests/Functions/Move-JiraVersion.Unit.Tests.ps1
new file mode 100644
index 00000000..8fdd98bd
--- /dev/null
+++ b/Tests/Functions/Move-JiraVersion.Unit.Tests.ps1
@@ -0,0 +1,243 @@
+#requires -modules BuildHelpers
+#requires -modules @{ ModuleName = "Pester"; ModuleVersion = "4.4.0" }
+
+Describe "Move-JiraVersion" -Tag 'Unit' {
+
+    BeforeAll {
+        Remove-Item -Path Env:\BH*
+        $projectRoot = (Resolve-Path "$PSScriptRoot/../..").Path
+        if ($projectRoot -like "*Release") {
+            $projectRoot = (Resolve-Path "$projectRoot/..").Path
+        }
+
+        Import-Module BuildHelpers
+        Set-BuildEnvironment -BuildOutput '$ProjectPath/Release' -Path $projectRoot -ErrorAction SilentlyContinue
+
+        $env:BHManifestToTest = $env:BHPSModuleManifest
+        $script:isBuild = $PSScriptRoot -like "$env:BHBuildOutput*"
+        if ($script:isBuild) {
+            $Pattern = [regex]::Escape($env:BHProjectPath)
+
+            $env:BHBuildModuleManifest = $env:BHPSModuleManifest -replace $Pattern, $env:BHBuildOutput
+            $env:BHManifestToTest = $env:BHBuildModuleManifest
+        }
+
+        Import-Module "$env:BHProjectPath/Tools/BuildTools.psm1"
+
+        Remove-Module $env:BHProjectName -ErrorAction SilentlyContinue
+        Import-Module $env:BHManifestToTest
+    }
+    AfterAll {
+        Remove-Module $env:BHProjectName -ErrorAction SilentlyContinue
+        Remove-Module BuildHelpers -ErrorAction SilentlyContinue
+        Remove-Item -Path Env:\BH*
+    }
+
+    InModuleScope JiraPS {
+
+        . "$PSScriptRoot/../Shared.ps1"
+
+        $jiraServer = 'http://jiraserver.example.com'
+        $versionID1 = 16840
+        $versionID2 = 16940
+        $projectKey = 'LDD'
+        $projectId = '12101'
+
+        $JiraProjectData = @"
+[
+    {
+        "Key" : "$projectKey",
+        "Id": "$projectId"
+    },
+    {
+        "Key" : "foo",
+        "Id": "99"
+    }
+]
+"@
+
+        #region Mock
+        Mock Get-JiraConfigServer -ModuleName JiraPS {
+            Write-Output $jiraServer
+        }
+
+        Mock Get-JiraProject -ModuleName JiraPS {
+            $Projects = ConvertFrom-Json $JiraProjectData
+            $Projects.PSObject.TypeNames.Insert(0, 'JiraPS.Project')
+            $Projects | Where-Object {$_.Key -in $Project}
+        }
+
+        Mock Get-JiraVersion -ModuleName JiraPS {
+            foreach ($_id in $Id) {
+                $Version = [PSCustomObject]@{
+                    Id          = $_Id
+                    Name        = "v1"
+                    Description = "My Desccription"
+                    Project     = (Get-JiraProject -Project $projectKey)
+                    ReleaseDate = (Get-Date "2017-12-01")
+                    StartDate   = (Get-Date "2017-01-01")
+                    RestUrl     = "$jiraServer/rest/api/latest/version/$_Id"
+                }
+                $Version.PSObject.TypeNames.Insert(0, 'JiraPS.Version')
+                $Version
+            }
+        }
+
+        Mock Invoke-JiraMethod -ModuleName JiraPS -ParameterFilter { $Method -eq 'POST' -and $URI -like "$jiraServer/rest/api/*/version/$versionID1/move" } {
+            ShowMockInfo 'Invoke-JiraMethod' 'Method', 'Uri'
+        }
+
+        Mock Invoke-JiraMethod -ModuleName JiraPS -ParameterFilter { $Method -eq 'POST' -and $URI -like "$jiraServer/rest/api/*/version/$versionID2/move" } {
+            ShowMockInfo 'Invoke-JiraMethod' 'Method', 'Uri'
+        }
+
+        # Generic catch-all. This will throw an exception if we forgot to mock something.
+        Mock Invoke-JiraMethod -ModuleName JiraPS {
+            ShowMockInfo 'Invoke-JiraMethod' 'Method', 'Uri'
+            throw "Unidentified call to Invoke-JiraMethod"
+        }
+        #endregion Mock
+
+        Context "Sanity checking" {
+            $command = Get-Command -Name Move-JiraVersion
+
+            defParam $command 'Version'
+            defParam $command 'Position'
+            defParam $command 'After'
+            defParam $command 'Credential'
+        }
+
+        Context "ByPosition behavior checking" {
+            It 'moves a Version using its ID and Last Position' {
+                { Move-JiraVersion -Version $versionID1 -Position Last -ErrorAction Stop } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 0 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match '"position":\s*"Last"'
+                }
+            }
+            It 'moves a Version using its ID and Earlier Position' {
+                { Move-JiraVersion -Version $versionID1 -Position Earlier -ErrorAction Stop } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 0 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match '"position":\s*"Earlier"'
+                }
+            }
+            It 'moves a Version using a JiraPS.Version object and Later Position' {
+                {
+                    $version = Get-JiraVersion -ID $versionID2
+                    Move-JiraVersion -Version $version -Position Later -ErrorAction Stop
+                } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID2/move" -and
+                    $Body -match '"position":\s*"Later"'
+                }
+            }
+            It 'moves a Version using JiraPS.Version object and First Position' {
+                {
+                    $version = Get-JiraVersion -ID $versionID2
+                    Move-JiraVersion -Version $version -Position First -ErrorAction Stop
+                } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID2/move" -and
+                    $Body -match '"position":\s*"First"'
+                }
+            }
+            It 'moves a Version using JiraPS.Version object over pipeline and First Position' {
+                {
+                    $version = Get-JiraVersion -ID $versionID2
+                    $version | Move-JiraVersion -Position First -ErrorAction Stop
+                } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID2/move" -and
+                    $Body -match '"position":\s*"First"'
+                }
+            }
+            It 'moves a Version using its ID over pipeline and First Position' {
+                {
+                    $versionID1 | Move-JiraVersion -Position First -ErrorAction Stop
+                } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 0 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match '"position":\s*"First"'
+                }
+            }
+        }
+        Context "ByAfter behavior checking" {
+            It 'moves a Version using its ID and other Version ID' {
+                $restUrl = (Get-JiraVersion -Id $versionID2).RestUrl
+                { Move-JiraVersion -Version $versionID1 -After $versionID2 -ErrorAction Stop } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 2 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match """after"":\s*""$restUrl"""
+                }
+            }
+            It 'moves a Version using JiraPS.Version object and other Version ID' {
+                $restUrl = (Get-JiraVersion -Id $versionID2).RestUrl
+                $version1 = Get-JiraVersion -ID $versionID1
+                { Move-JiraVersion -Version $version1 -After $versionID2 -ErrorAction Stop } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 3 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match """after"":\s*""$restUrl"""
+                }
+            }
+            It 'moves a Version using its ID and other Version JiraPS.Version object' {
+                $version2 = Get-JiraVersion -ID $versionID2
+                { Move-JiraVersion -Version $versionID1 -After $version2 -ErrorAction Stop } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match """after"":\s*""$($version2.RestUrl)"""
+                }
+            }
+            It 'moves a Version using its ID over pipeline and other Version JiraPS.Version object' {
+                $version2 = Get-JiraVersion -ID $versionID2
+                { $versionID1 | Move-JiraVersion -After $version2 -ErrorAction Stop } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match """after"":\s*""$($version2.RestUrl)"""
+                }
+            }
+            It 'moves a Version using JiraPS.Version object over pipeline and other Version JiraPS.Version object' {
+                $version1 = Get-JiraVersion -ID $versionID1
+                $version2 = Get-JiraVersion -ID $versionID2
+                { $version1 | Move-JiraVersion -After $version2 -ErrorAction Stop } | Should Not Throw
+                Assert-MockCalled 'Get-JiraVersion' -Times 2 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Get-JiraConfigServer' -Times 1 -Scope It -ModuleName JiraPS -Exactly
+                Assert-MockCalled 'Invoke-JiraMethod' -Times 1 -Scope It -ModuleName JiraPS -Exactly -ParameterFilter {
+                    $Method -eq 'POST' -and
+                    $URI -like "$jiraServer/rest/api/latest/version/$versionID1/move" -and
+                    $Body -match """after"":\s*""$($version2.RestUrl)"""
+                }
+            }
+        }
+    }
+}