diff --git a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostDocumentFormattingEndpointTest.cs b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostDocumentFormattingEndpointTest.cs
index 7370b711fc1..a1bfb08d661 100644
--- a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostDocumentFormattingEndpointTest.cs
+++ b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostDocumentFormattingEndpointTest.cs
@@ -26,8 +26,9 @@ public class CohostDocumentFormattingEndpointTest(HtmlFormattingFixture htmlForm
     // and provide regression prevention. The tests here are not exhaustive, but they validate the the cohost endpoints
     // call into the formatting engine at least, and handles C#, Html and Razor formatting changes correctly.
 
-    [Fact]
-    public Task Formatting()
+    [Theory]
+    [CombinatorialData]
+    public Task Formatting(bool fuse)
         => VerifyDocumentFormattingAsync(
             input: """
             @preservewhitespace    true
@@ -104,10 +105,13 @@ private void M(string thisIsMyString)
                 }
             }
 
-            """);
+            """,
+            fuse: fuse);
 
-    private async Task VerifyDocumentFormattingAsync(string input, string expected)
+    private async Task VerifyDocumentFormattingAsync(string input, string expected, bool fuse)
     {
+        UpdateClientInitializationOptions(opt => opt with { ForceRuntimeCodeGeneration = fuse });
+
         var document = await CreateProjectAndRazorDocumentAsync(input);
         var inputText = await document.GetTextAsync(DisposalToken);
 
diff --git a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnAutoInsertEndpointTest.cs b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnAutoInsertEndpointTest.cs
index 3919a1298df..587a3aaa6f5 100644
--- a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnAutoInsertEndpointTest.cs
+++ b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnAutoInsertEndpointTest.cs
@@ -10,6 +10,7 @@
 using Microsoft.CodeAnalysis.Text;
 using Microsoft.VisualStudio.LanguageServer.Protocol;
 using Microsoft.VisualStudio.LanguageServices.Razor.LanguageClient.Cohost;
+using Microsoft.VisualStudio.LicenseManagement.Interop;
 using Microsoft.VisualStudio.Razor.Settings;
 using Roslyn.Test.Utilities;
 using Xunit;
@@ -84,8 +85,9 @@ The end.
             delegatedResponseText: "\"$0\"");
     }
 
-    [Fact]
-    public async Task CSharp_OnForwardSlash()
+    [Theory]
+    [CombinatorialData]
+    public async Task CSharp_OnForwardSlash(bool fuse)
     {
         await VerifyOnAutoInsertAsync(
             input: """
@@ -102,7 +104,8 @@ void TestMethod() {}
                     void TestMethod() {}
                 }
                 """,
-            triggerCharacter: "/");
+            triggerCharacter: "/",
+            fuse: fuse);
     }
 
     [Fact]
@@ -161,8 +164,9 @@ void TestMethod()
             fuse: fuse);
     }
 
-    [Fact]
-    public async Task CSharp_OnEnter_TwoSpaceIndent()
+    [Theory]
+    [CombinatorialData]
+    public async Task CSharp_OnEnter_TwoSpaceIndent(bool fuse)
     {
         await VerifyOnAutoInsertAsync(
             input: """
@@ -180,11 +184,13 @@ void TestMethod()
                 }
                 """,
             triggerCharacter: "\n",
-            tabSize: 2);
+            tabSize: 2,
+            fuse: fuse);
     }
 
-    [Fact]
-    public async Task CSharp_OnEnter_UseTabs()
+    [Theory]
+    [CombinatorialData]
+    public async Task CSharp_OnEnter_UseTabs(bool fuse)
     {
         const char tab = '\t';
         await VerifyOnAutoInsertAsync(
@@ -203,7 +209,8 @@ void TestMethod() {
                 }
                 """,
             triggerCharacter: "\n",
-            insertSpaces: false);
+            insertSpaces: false,
+            fuse: fuse);
     }
 
     private async Task VerifyOnAutoInsertAsync(
diff --git a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnTypeFormattingEndpointTest.cs b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnTypeFormattingEndpointTest.cs
index 1919956dad4..305704c6412 100644
--- a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnTypeFormattingEndpointTest.cs
+++ b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/CohostOnTypeFormattingEndpointTest.cs
@@ -56,8 +56,9 @@ await VerifyOnTypeFormattingAsync(
             triggerCharacter: '\n');
     }
 
-    [Fact]
-    public async Task CSharp()
+    [Theory]
+    [CombinatorialData]
+    public async Task CSharp(bool fuse)
     {
         await VerifyOnTypeFormattingAsync(
             input: """
@@ -70,11 +71,13 @@ await VerifyOnTypeFormattingAsync(
                         if (true) { }
                     }
                     """,
-            triggerCharacter: '}');
+            triggerCharacter: '}',
+            fuse: fuse);
     }
 
-    [Fact]
-    public async Task FormatsSimpleHtmlTag_OnType()
+    [Theory]
+    [CombinatorialData]
+    public async Task FormatsSimpleHtmlTag_OnType(bool fuse)
     {
         await VerifyOnTypeFormattingAsync(
             input: """
@@ -98,11 +101,14 @@ await VerifyOnTypeFormattingAsync(
                     </html>
                     """,
             triggerCharacter: ';',
-            html: true);
+            html: true,
+            fuse: fuse);
     }
 
-    private async Task VerifyOnTypeFormattingAsync(TestCode input, string expected, char triggerCharacter, bool html = false)
+    private async Task VerifyOnTypeFormattingAsync(TestCode input, string expected, char triggerCharacter, bool html = false, bool fuse = false)
     {
+        UpdateClientInitializationOptions(opt => opt with { ForceRuntimeCodeGeneration = fuse });
+
         var document = await CreateProjectAndRazorDocumentAsync(input.Text);
         var inputText = await document.GetTextAsync(DisposalToken);
         var position = inputText.GetPosition(input.Position);