diff --git a/Tests/Engine/CustomizedRule.tests.ps1 b/Tests/Engine/CustomizedRule.tests.ps1
index 609c8f3ae..0be3cfb80 100644
--- a/Tests/Engine/CustomizedRule.tests.ps1
+++ b/Tests/Engine/CustomizedRule.tests.ps1
@@ -97,7 +97,7 @@ Describe "Test importing correct customized rules" {
 		    $customizedRulePath.Count | Should Be 1
 		}
 
-        It "will show the custom rule when given a rule folder path with trailing backslash" -skip:(!$IsWindows){
+        It "will show the custom rule when given a rule folder path with trailing backslash" -skip:$($IsLinux -or $IsMacOS) {
 			# needs fixing for linux
             $customizedRulePath = Get-ScriptAnalyzerRule  -CustomizedRulePath $directory/samplerule/ | Where-Object {$_.RuleName -eq $measure}
             $customizedRulePath.Count | Should Be 1
@@ -106,7 +106,7 @@ Describe "Test importing correct customized rules" {
 		It "will show the custom rules when given a glob" {
 			# needs fixing for Linux
 			$expectedNumRules = 4
-			if (!$IsWindows)
+			if ($IsLinux -or $IsMacOS)
 			{
 				$expectedNumRules = 3
 			}
@@ -122,7 +122,7 @@ Describe "Test importing correct customized rules" {
 		It "will show the custom rules when given glob with recurse switch" {
 			# needs fixing for Linux
 			$expectedNumRules = 5
-			if (!$IsWindows)
+			if ($IsLinux -or $IsMacOS)
 			{
 				$expectedNumRules = 4
 			}
@@ -162,7 +162,7 @@ Describe "Test importing correct customized rules" {
 		{
             It "will show the custom rule in the results when given a rule folder path with trailing backslash" {
 				# needs fixing for Linux
-				if ($IsWindows)
+				if (!$IsLinux -and !$IsMacOS)
 				{
 					$customizedRulePath = Invoke-ScriptAnalyzer $directory\TestScript.ps1 -CustomizedRulePath $directory\samplerule\ | Where-Object {$_.Message -eq $message}
 					$customizedRulePath.Count | Should Be 1
diff --git a/Tests/Engine/ModuleDependencyHandler.tests.ps1 b/Tests/Engine/ModuleDependencyHandler.tests.ps1
index c8bf52e6c..3d73bdbcc 100644
--- a/Tests/Engine/ModuleDependencyHandler.tests.ps1
+++ b/Tests/Engine/ModuleDependencyHandler.tests.ps1
@@ -1,7 +1,9 @@
+$directory = Split-Path -Parent $MyInvocation.MyCommand.Path
+
 Describe "Resolve DSC Resource Dependency" {
     BeforeAll {
         $skipTest = $false
-        if ( -not $IsWindows -or $testingLibararyUsage -or ($PSversionTable.PSVersion -lt [Version]'5.0.0'))
+        if ($IsLinux -or $IsMacOS -or $testingLibararyUsage -or ($PSversionTable.PSVersion -lt [Version]'5.0.0'))
         {
             $skipTest = $true
             return
@@ -9,8 +11,6 @@ Describe "Resolve DSC Resource Dependency" {
         $SavedPSModulePath = $env:PSModulePath
         $violationFileName = 'MissingDSCResource.ps1'
         $violationFilePath = Join-Path $directory $violationFileName
-
-        $directory = Split-Path -Parent $MyInvocation.MyCommand.Path
         $testRootDirectory = Split-Path -Parent $directory
         Import-Module (Join-Path $testRootDirectory 'PSScriptAnalyzerTestHelper.psm1')
 
@@ -166,15 +166,6 @@ Describe "Resolve DSC Resource Dependency" {
             Copy-Item -Recurse -Path $modulePath -Destination $tempModulePath
         }
 
-        AfterAll {
-            if ( $skipTest ) { return }
-            #restore environment variables and clean up temporary location
-            $env:LOCALAPPDATA = $oldLocalAppDataPath
-            $env:TEMP = $oldTempPath
-            Remove-Item -Recurse -Path $tempModulePath -Force
-            Remove-Item -Recurse -Path $tempPath -Force
-        }
-
         It "Doesn't have parse errors" -skip:$skipTest {
             # invoke script analyzer
             $dr = Invoke-ScriptAnalyzer -Path $violationFilePath -ErrorVariable parseErrors -ErrorAction SilentlyContinue
@@ -186,6 +177,14 @@ Describe "Resolve DSC Resource Dependency" {
             $env:PSModulePath | Should Be $oldPSModulePath
         }
 
+        if (!$skipTest)
+        {
+            $env:LOCALAPPDATA = $oldLocalAppDataPath
+            $env:TEMP = $oldTempPath
+            Remove-Item -Recurse -Path $tempModulePath -Force
+            Remove-Item -Recurse -Path $tempPath -Force
+        }
+
         It "Keeps the environment variables unchanged" -skip:$skipTest {
             Test-EnvironmentVariables($oldEnvVars)
         }
diff --git a/Tests/Engine/RuleSuppression.tests.ps1 b/Tests/Engine/RuleSuppression.tests.ps1
index 3127a3ae5..7ab02d79e 100644
--- a/Tests/Engine/RuleSuppression.tests.ps1
+++ b/Tests/Engine/RuleSuppression.tests.ps1
@@ -106,7 +106,7 @@ function SuppressPwdParam()
     }
 
     Context "Rule suppression within DSC Configuration definition" {
-        It "Suppresses rule" -skip:((!$IsWindows) -or ($PSVersionTable.PSVersion.Major -lt 5)) {
+        It "Suppresses rule" -skip:($IsLinux -or $IsMacOS -or ($PSVersionTable.PSVersion.Major -lt 5)) {
             $suppressedRule = Invoke-ScriptAnalyzer -ScriptDefinition $ruleSuppressionInConfiguration -SuppressedOnly
             $suppressedRule.Count | Should Be 1
         }
diff --git a/Tests/Rules/AlignAssignmentStatement.tests.ps1 b/Tests/Rules/AlignAssignmentStatement.tests.ps1
index 0854045b8..5d076dc95 100644
--- a/Tests/Rules/AlignAssignmentStatement.tests.ps1
+++ b/Tests/Rules/AlignAssignmentStatement.tests.ps1
@@ -66,7 +66,7 @@ $x = @{ }
     }
 
     Context "When assignment statements are in DSC Configuration" {
-        It "Should find violations when assignment statements are not aligned" -skip:(!$IsWindows) {
+        It "Should find violations when assignment statements are not aligned" -skip:($IsLinux -or $IsMacOS) {
             $def = @'
 Configuration MyDscConfiguration {
 
diff --git a/appveyor.yml b/appveyor.yml
index c28bf8b54..55ae23912 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -59,12 +59,11 @@ test_script:
     - ps: |
         copy-item "C:\projects\psscriptanalyzer\out\PSScriptAnalyzer" "$Env:ProgramFiles\WindowsPowerShell\Modules\" -Recurse -Force
         $testResultsFile = ".\TestResults.xml"
-        $ruleTestResultsFile = ".\RuleTestResults.xml"
         $testScripts = "C:\projects\psscriptanalyzer\Tests\Engine","C:\projects\psscriptanalyzer\Tests\Rules"
         $testResults = Invoke-Pester -Script $testScripts -OutputFormat NUnitXml -OutputFile $testResultsFile -PassThru
         (New-Object 'System.Net.WebClient').UploadFile("https://ci.appveyor.com/api/testresults/nunit/$($env:APPVEYOR_JOB_ID)", (Resolve-Path $testResultsFile))
-        if ($engineTestResults.FailedCount -gt 0) {
-            throw "$($engineTestResults.FailedCount) tests failed."
+        if ($testResults.FailedCount -gt 0) {
+            throw "$($testResults.FailedCount) tests failed."
         }
 
 # Upload the project along with TestResults as a zip archive