diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index a0f6047e63c..11bb619b856 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -11,82 +11,82 @@
       <Sha>9ae78a4e6412926d19ba97cfed159bf9de70b538</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CommonLanguageServerProtocol.Framework" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CommonLanguageServerProtocol.Framework" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.Razor" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.ExternalAccess.Razor" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Common" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.Common" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp.EditorFeatures" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp.EditorFeatures" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Features" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Features" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Common" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Common" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Text" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Text" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Wpf" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.EditorFeatures.Wpf" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Remote.ServiceHub" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.Remote.ServiceHub" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.VisualStudio.LanguageServices" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.VisualStudio.LanguageServices" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Test.Utilities" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.CodeAnalysis.Test.Utilities" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.roslyn" Version="4.11.0-3.24303.3">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.roslyn" Version="4.12.0-1.24366.6">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>ec443fac0dcc4e9ce2f83b9202f689dc2872b9f3</Sha>
+      <Sha>30edd04fd41dec9e8f9f48e698ebd5b80d9f7677</Sha>
       <SourceBuild RepoName="roslyn" ManagedOnly="true" />
     </Dependency>
   </ProductDependencies>
diff --git a/eng/Versions.props b/eng/Versions.props
index ab3d814a8d8..6aa6e7cad14 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -53,25 +53,25 @@
     <MicrosoftSourceBuildIntermediatearcadePackageVersion>9.0.0-beta.24352.2</MicrosoftSourceBuildIntermediatearcadePackageVersion>
     <MicrosoftDotNetXliffTasksPackageVersion>1.0.0-beta.23475.1</MicrosoftDotNetXliffTasksPackageVersion>
     <MicrosoftSourceBuildIntermediatexlifftasksPackageVersion>1.0.0-beta.23475.1</MicrosoftSourceBuildIntermediatexlifftasksPackageVersion>
-    <MicrosoftNetCompilersToolsetPackageVersion>4.11.0-3.24303.3</MicrosoftNetCompilersToolsetPackageVersion>
-    <MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>4.11.0-3.24303.3</MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>
-    <MicrosoftCodeAnalysisExternalAccessRazorPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisExternalAccessRazorPackageVersion>
-    <MicrosoftCodeAnalysisCommonPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisCommonPackageVersion>
-    <MicrosoftCodeAnalysisCSharpPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisCSharpPackageVersion>
-    <MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisEditorFeaturesPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>
-    <MicrosoftCodeAnalysisEditorFeaturesWpfPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisEditorFeaturesWpfPackageVersion>
-    <MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>
-    <MicrosoftCodeAnalysisTestUtilitiesPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisTestUtilitiesPackageVersion>
-    <MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>
-    <MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>
-    <MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>4.11.0-3.24303.3</MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>
-    <MicrosoftSourceBuildIntermediateroslynPackageVersion>4.11.0-3.24303.3</MicrosoftSourceBuildIntermediateroslynPackageVersion>
-    <MicrosoftVisualStudioLanguageServicesPackageVersion>4.11.0-3.24303.3</MicrosoftVisualStudioLanguageServicesPackageVersion>
+    <MicrosoftNetCompilersToolsetPackageVersion>4.12.0-1.24366.6</MicrosoftNetCompilersToolsetPackageVersion>
+    <MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>4.12.0-1.24366.6</MicrosoftCommonLanguageServerProtocolFrameworkPackageVersion>
+    <MicrosoftCodeAnalysisExternalAccessRazorPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisExternalAccessRazorPackageVersion>
+    <MicrosoftCodeAnalysisCommonPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisCommonPackageVersion>
+    <MicrosoftCodeAnalysisCSharpPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisCSharpPackageVersion>
+    <MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisCSharpEditorFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisEditorFeaturesPackageVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisEditorFeaturesCommonPackageVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisEditorFeaturesTextPackageVersion>
+    <MicrosoftCodeAnalysisEditorFeaturesWpfPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisEditorFeaturesWpfPackageVersion>
+    <MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisRemoteServiceHubPackageVersion>
+    <MicrosoftCodeAnalysisTestUtilitiesPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisTestUtilitiesPackageVersion>
+    <MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisVisualBasicWorkspacesPackageVersion>
+    <MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisWorkspacesCommonPackageVersion>
+    <MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>4.12.0-1.24366.6</MicrosoftCodeAnalysisWorkspacesMSBuildPackageVersion>
+    <MicrosoftSourceBuildIntermediateroslynPackageVersion>4.12.0-1.24366.6</MicrosoftSourceBuildIntermediateroslynPackageVersion>
+    <MicrosoftVisualStudioLanguageServicesPackageVersion>4.12.0-1.24366.6</MicrosoftVisualStudioLanguageServicesPackageVersion>
     <!--
       Exception - Microsoft.Extensions.ObjectPool and System.Collections.Immutable packages are not updated by automation,
       but are present in Version.Details.xml for source-build PVP flow. See the comment in Version.Details.xml for more information.
diff --git a/src/Razor/test/Microsoft.AspNetCore.Razor.LanguageServer.Test/RazorLanguageServerTest.cs b/src/Razor/test/Microsoft.AspNetCore.Razor.LanguageServer.Test/RazorLanguageServerTest.cs
index 70477b6bb44..3fc2585b22d 100644
--- a/src/Razor/test/Microsoft.AspNetCore.Razor.LanguageServer.Test/RazorLanguageServerTest.cs
+++ b/src/Razor/test/Microsoft.AspNetCore.Razor.LanguageServer.Test/RazorLanguageServerTest.cs
@@ -6,6 +6,7 @@
 using System.IO;
 using System.Linq;
 using System.Reflection;
+using System.Text.Json;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Razor.LanguageServer.Extensions;
 using Microsoft.AspNetCore.Razor.LanguageServer.Hosting;
@@ -34,20 +35,20 @@ public async Task LocaleIsSetCorrectly()
         server.Initialize();
         var queue = server.GetTestAccessor().GetRequestExecutionQueue();
 
-        var initializeParams = new InitializeParams
+        var initializeParams = JsonSerializer.SerializeToElement(new InitializeParams
         {
             Capabilities = new(),
             Locale = "de-DE"
-        };
+        });
 
-        await queue.ExecuteAsync<InitializeParams, InitializeResult>(initializeParams, Methods.InitializeName, LanguageServerConstants.DefaultLanguageName, server.GetLspServices(), DisposalToken);
+        await queue.ExecuteAsync(initializeParams, Methods.InitializeName, server.GetLspServices(), DisposalToken);
 
         // We have to send one more request, because culture is set before any request starts, but the first initialize request has to
         // be started in order to set the culture.
         // The request isn't actually valid, so we wrap it in a try catch, but we don't care for this test
         try
         {
-            await queue.ExecuteAsync<VSInternalDocumentDiagnosticsParams, VSInternalDiagnosticReport[]>(new(), VSInternalMethods.DocumentPullDiagnosticName, LanguageServerConstants.DefaultLanguageName, server.GetLspServices(), DisposalToken);
+            await queue.ExecuteAsync(JsonSerializer.SerializeToElement(new object()), VSInternalMethods.DocumentPullDiagnosticName, server.GetLspServices(), DisposalToken);
         }
         catch { }
 
diff --git a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/HtmlDocumentSynchronizerTest.cs b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/HtmlDocumentSynchronizerTest.cs
index e6683df3ac7..6e31aeef793 100644
--- a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/HtmlDocumentSynchronizerTest.cs
+++ b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/HtmlDocumentSynchronizerTest.cs
@@ -40,10 +40,6 @@ public async Task TrySynchronize_NewDocument_Generates()
 
         Assert.True(await synchronizer.TrySynchronizeAsync(document, DisposalToken));
 
-        var version = await RazorDocumentVersion.CreateAsync(document, DisposalToken);
-
-        Assert.Equal(1, version.WorkspaceVersion);
-
         Assert.Collection(publisher.Publishes,
             i =>
             {
diff --git a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestBrokeredServiceInterceptor.cs b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestBrokeredServiceInterceptor.cs
index 4c8e70ed2ea..7d0da662311 100644
--- a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestBrokeredServiceInterceptor.cs
+++ b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestBrokeredServiceInterceptor.cs
@@ -4,21 +4,19 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.AspNetCore.Razor;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor;
 using Microsoft.CodeAnalysis.Remote.Razor;
+using Xunit;
 
 namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 
 internal sealed class TestBrokeredServiceInterceptor : IRazorBrokeredServiceInterceptor
 {
-    private Solution? _solution;
+    private readonly TestSolutionStore _solutionStore = new();
 
-    public void UpdateSolution(Solution solution)
-    {
-        _solution = solution;
-    }
+    public Task<RazorPinnedSolutionInfoWrapper> GetSolutionInfoAsync(Solution solution, CancellationToken cancellationToken)
+        => _solutionStore.AddAsync(solution, cancellationToken);
 
     public ValueTask RunServiceAsync(
         Func<CancellationToken, ValueTask> implementation,
@@ -29,5 +27,11 @@ public ValueTask<T> RunServiceAsync<T>(
         RazorPinnedSolutionInfoWrapper solutionInfo,
         Func<Solution, ValueTask<T>> implementation,
         CancellationToken cancellationToken)
-        => implementation(_solution.AssumeNotNull());
+    {
+        var solution = _solutionStore.Get(solutionInfo);
+
+        Assert.NotNull(solution);
+
+        return implementation(solution);
+    }
 }
diff --git a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestRemoteServiceInvoker.cs b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestRemoteServiceInvoker.cs
index 52f5af1e270..9e5c8651aac 100644
--- a/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestRemoteServiceInvoker.cs
+++ b/src/Razor/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Cohost/TestRemoteServiceInvoker.cs
@@ -53,11 +53,7 @@ private async Task<TService> GetOrCreateServiceAsync<TService>()
     {
         var service = await GetOrCreateServiceAsync<TService>();
 
-        // In an ideal world we'd be able to maintain a dictionary of solution checksums in TestServiceBroker, and use
-        // the RazorPinnedSolutionInfoWrapper properly, but we need Roslyn changes for that. For now, this works fine
-        // as we don't have any code that makes multiple parallel calls to TryInvokeAsync in the same test.
-        var solutionInfo = new RazorPinnedSolutionInfoWrapper();
-        _serviceInterceptor.UpdateSolution(solution);
+        var solutionInfo = await _serviceInterceptor.GetSolutionInfoAsync(solution, cancellationToken);
         return await invocation(service, solutionInfo, cancellationToken);
     }