diff --git a/src/modules/previewpane/PreviewPaneUnitTests/HTMLParsingExtensionTest.cs b/src/modules/previewpane/PreviewPaneUnitTests/HTMLParsingExtensionTest.cs
index ef4f8a7352..ed098d9c07 100644
--- a/src/modules/previewpane/PreviewPaneUnitTests/HTMLParsingExtensionTest.cs
+++ b/src/modules/previewpane/PreviewPaneUnitTests/HTMLParsingExtensionTest.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Markdig;
 using MarkdownPreviewHandler;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
@@ -18,29 +21,28 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void Extension_UpdatesTablesClass_WhenUsed()
         {
-            // Arrange 
-            String mdString = "| A | B |\n| -- | -- | ";
+            // Arrange
+            string mdString = "| A | B |\n| -- | -- | ";
             HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { });
             MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
 
             // Act
-            String html = Markdown.ToHtml(mdString, markdownPipeline);
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
 
             // Assert
             Assert.AreEqual(html, "<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>A</th>\n<th>B</th>\n</tr>\n</thead>\n</table>\n");
         }
 
-
         [TestMethod]
         public void Extension_UpdatesBlockQuotesClass_WhenUsed()
         {
-            // Arrange 
-            String mdString = "> Blockquotes.";
+            // Arrange
+            string mdString = "> Blockquotes.";
             HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { });
             MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
 
             // Act
-            String html = Markdown.ToHtml(mdString, markdownPipeline);
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
 
             // Assert
             Assert.AreEqual(html, "<blockquote class=\"blockquote\">\n<p>Blockquotes.</p>\n</blockquote>\n");
@@ -49,13 +51,13 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void Extension_UpdatesFigureClassAndBlocksRelativeUrl_WhenUsed()
         {
-            // arrange 
-            String mdString = "![text](a.jpg \"Figure\")";
+            // arrange
+            string mdString = "![text](a.jpg \"Figure\")";
             HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { }, "C:\\Users\\");
             MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
 
             // Act
-            String html = Markdown.ToHtml(mdString, markdownPipeline);
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
 
             // Assert
             Assert.AreEqual(html, "<p><img src=\"#\" class=\"img-fluid\" alt=\"text\" title=\"Figure\" /></p>\n");
@@ -64,13 +66,13 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void Extension_AddsClassToFigureCaption_WhenUsed()
         {
-            // arrange 
-            String mdString = "^^^ This is a caption";
+            // arrange
+            string mdString = "^^^ This is a caption";
             HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { }, "C:/Users/");
             MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
 
             // Act
-            String html = Markdown.ToHtml(mdString, markdownPipeline);
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
 
             // Assert
             Assert.AreEqual(html, "<figure class=\"figure\">\n<figcaption class=\"figure-caption\">This is a caption</figcaption>\n</figure>\n");
@@ -81,18 +83,16 @@ namespace PreviewPaneUnitTests
         {
             // arrange
             int count = 0;
-            String mdString = "![text](http://dev.nodeca.com \"Figure\")";
+            string mdString = "![text](http://dev.nodeca.com \"Figure\")";
             HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { count++; });
             MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
 
             // Act
-            String html = Markdown.ToHtml(mdString, markdownPipeline);
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
 
             // Assert
             Assert.AreEqual(count, 1);
             Assert.AreEqual(html, "<p><img src=\"#\" class=\"img-fluid\" alt=\"text\" title=\"Figure\" /></p>\n");
-
         }
-
     }
 }
diff --git a/src/modules/previewpane/PreviewPaneUnitTests/MarkdownPreviewHandlerTest.cs b/src/modules/previewpane/PreviewPaneUnitTests/MarkdownPreviewHandlerTest.cs
index 213c154916..1695b4f84d 100644
--- a/src/modules/previewpane/PreviewPaneUnitTests/MarkdownPreviewHandlerTest.cs
+++ b/src/modules/previewpane/PreviewPaneUnitTests/MarkdownPreviewHandlerTest.cs
@@ -1,10 +1,9 @@
-using System;
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using System.Drawing;
-using System.Linq;
-using System.Text.RegularExpressions;
 using System.Windows.Forms;
-using System.Xml.Linq;
-using Markdig;
 using MarkdownPreviewHandler;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using PreviewHandlerCommon;
@@ -17,7 +16,7 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void MarkdownPreviewHandlerControl__AddsBrowserToForm_WhenDoPreviewIsCalled()
         {
-            // Arrange 
+            // Arrange
             using (var markdownPreviewHandlerControl = new MarkdownPreviewHandlerControl())
             {
                 // Act
@@ -32,7 +31,7 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void MarkdownPreviewHandlerControl__AddsInfoBarToFormIfExternalImageLinkPresent_WhenDoPreviewIsCalled()
         {
-            // Arrange 
+            // Arrange
             using (var markdownPreviewHandlerControl = new MarkdownPreviewHandlerControl())
             {
                 // Act
@@ -47,7 +46,7 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void MarkdownPreviewHandlerControl__AddsInfoBarToFormIfHTMLImageTagIsPresent_WhenDoPreviewIsCalled()
         {
-            // Arrange 
+            // Arrange
             using (var markdownPreviewHandlerControl = new MarkdownPreviewHandlerControl())
             {
                 // Act
@@ -62,7 +61,7 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void MarkdownPreviewHandlerControl__DoesNotAddInfoBarToFormIfExternalImageLinkNotPresent_WhenDoPreviewIsCalled()
         {
-            // Arrange 
+            // Arrange
             using (var markdownPreviewHandlerControl = new MarkdownPreviewHandlerControl())
             {
                 // Act
@@ -77,7 +76,7 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void MarkdownPreviewHandlerControl__UpdatesWebBrowserSettings_WhenDoPreviewIsCalled()
         {
-            // Arrange 
+            // Arrange
             using (var markdownPreviewHandlerControl = new MarkdownPreviewHandlerControl())
             {
                 // Act
@@ -97,7 +96,7 @@ namespace PreviewPaneUnitTests
         [TestMethod]
         public void MarkdownPreviewHandlerControl__UpdateInfobarSettings_WhenDoPreviewIsCalled()
         {
-            // Arrange 
+            // Arrange
             using (var markdownPreviewHandlerControl = new MarkdownPreviewHandlerControl())
             {
                 // Act
@@ -113,4 +112,4 @@ namespace PreviewPaneUnitTests
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/modules/previewpane/PreviewPaneUnitTests/UnitTests-MarkdownPreviewHandler.csproj b/src/modules/previewpane/PreviewPaneUnitTests/UnitTests-MarkdownPreviewHandler.csproj
index 92d60c6cc1..530c9c537f 100644
--- a/src/modules/previewpane/PreviewPaneUnitTests/UnitTests-MarkdownPreviewHandler.csproj
+++ b/src/modules/previewpane/PreviewPaneUnitTests/UnitTests-MarkdownPreviewHandler.csproj
@@ -125,6 +125,21 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
   </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\..\..\codeAnalysis\GlobalSuppressions.cs">
+      <Link>GlobalSuppressions.cs</Link>
+    </Compile>
+    <AdditionalFiles Include="..\..\..\codeAnalysis\StyleCop.json">
+      <Link>StyleCop.json</Link>
+    </AdditionalFiles>
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="StyleCop.Analyzers">
+      <Version>1.1.118</Version>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
   <Import Project="$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets" Condition="Exists('$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets')" />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file