diff --git a/test/SharedFx.UnitTests/ConsoleReporter.cs b/test/SharedFx.UnitTests/ConsoleReporter.cs
new file mode 100644
index 0000000000..190e805dc2
--- /dev/null
+++ b/test/SharedFx.UnitTests/ConsoleReporter.cs
@@ -0,0 +1,71 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.IO;
+using McMaster.Extensions.CommandLineUtils;
+
+namespace Microsoft.Extensions.Tools.Internal
+{
+    public class ConsoleReporter : IReporter
+    {
+        private object _writeLock = new object();
+
+        public ConsoleReporter(IConsole console)
+            : this(console, verbose: false, quiet: false)
+        { }
+
+        public ConsoleReporter(IConsole console, bool verbose, bool quiet)
+        {
+            Console = console;
+            IsVerbose = verbose;
+            IsQuiet = quiet;
+        }
+
+        protected IConsole Console { get; }
+        public bool IsVerbose { get; }
+        public bool IsQuiet { get; }
+
+        protected virtual void WriteLine(TextWriter writer, string message, ConsoleColor? color)
+        {
+            lock (_writeLock)
+            {
+                if (color.HasValue)
+                {
+                    Console.ForegroundColor = color.Value;
+                }
+
+                writer.WriteLine(message);
+
+                if (color.HasValue)
+                {
+                    Console.ResetColor();
+                }
+            }
+        }
+
+        public virtual void Error(string message)
+            => WriteLine(Console.Error, message, ConsoleColor.Red);
+        public virtual void Warn(string message)
+            => WriteLine(Console.Out, message, ConsoleColor.Yellow);
+
+        public virtual void Output(string message)
+        {
+            if (IsQuiet)
+            {
+                return;
+            }
+            WriteLine(Console.Out, message, color: null);
+        }
+
+        public virtual void Verbose(string message)
+        {
+            if (!IsVerbose)
+            {
+                return;
+            }
+
+            WriteLine(Console.Out, message, ConsoleColor.DarkGray);
+        }
+    }
+}
diff --git a/test/SharedFx.UnitTests/RetryHelper.cs b/test/SharedFx.UnitTests/RetryHelper.cs
new file mode 100644
index 0000000000..2d92113e36
--- /dev/null
+++ b/test/SharedFx.UnitTests/RetryHelper.cs
@@ -0,0 +1,65 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Threading.Tasks;
+using McMaster.Extensions.CommandLineUtils;
+
+namespace TriageBuildFailures
+{
+    internal static class RetryHelpers
+    {
+        /// <summary>
+        /// Constrain the exponential back-off to this many minutes.
+        /// </summary>
+        private const int MaxRetryMinutes = 15;
+
+        private static int TotalRetriesUsed;
+
+        public static int GetTotalRetriesUsed()
+        {
+            return TotalRetriesUsed;
+        }
+
+        public static async Task RetryAsync(Func<Task> action, IReporter reporter)
+        {
+            await RetryAsync<object>(
+                async () =>
+                {
+                    await action();
+                    return null;
+                },
+                reporter);
+        }
+
+        public static async Task<T> RetryAsync<T>(Func<Task<T>> action, IReporter reporter)
+        {
+            Exception firstException = null;
+
+            var retriesRemaining = 10;
+            var retryDelayInMinutes = 1;
+
+            while (retriesRemaining > 0)
+            {
+                try
+                {
+                    return await action();
+                }
+                catch (Exception e)
+                {
+                    firstException = firstException ?? e;
+                    reporter.Output($"Exception thrown! {e.Message}");
+                    reporter.Output($"Waiting {retryDelayInMinutes} minute(s) to retry ({retriesRemaining} left)...");
+                    await Task.Delay(retryDelayInMinutes * 60 * 1000);
+
+                    // Do exponential back-off, but limit it (1, 2, 4, 8, 15, 15, 15, ...)
+                    // With MaxRetryMinutes=15 and MaxRetries=10, this will delay a maximum of 105 minutes
+                    retryDelayInMinutes = Math.Min(2 * retryDelayInMinutes, MaxRetryMinutes);
+                    retriesRemaining--;
+                    TotalRetriesUsed++;
+                }
+            }
+            throw new InvalidOperationException("Max exception retries reached, giving up.", firstException);
+        }
+    }
+}
diff --git a/test/SharedFx.UnitTests/SharedFx.UnitTests.csproj b/test/SharedFx.UnitTests/SharedFx.UnitTests.csproj
index e574f7d305..e439e2842b 100644
--- a/test/SharedFx.UnitTests/SharedFx.UnitTests.csproj
+++ b/test/SharedFx.UnitTests/SharedFx.UnitTests.csproj
@@ -26,6 +26,10 @@
       <_Parameter1>MicrosoftNETCoreAppPackageVersion</_Parameter1>
       <_Parameter2>$(RuntimeFrameworkVersion)</_Parameter2>
     </AssemblyAttribute>
+    <AssemblyAttribute Include="Microsoft.AspNetCore.TestData">
+      <_Parameter1>PreviousAspNetCoreReleaseVersion</_Parameter1>
+      <_Parameter2>$(PreviousAspNetCoreReleaseVersion)</_Parameter2>
+    </AssemblyAttribute>
   </ItemGroup>
 
   <ItemGroup>
@@ -34,6 +38,7 @@
     <PackageReference Include="xunit" Version="$(XunitPackageVersion)" />
     <PackageReference Include="xunit.analyzers" Version="$(XunitAnalyzersPackageVersion)" />
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitRunnerVisualstudioPackageVersion)" />
+    <PackageReference Include="McMaster.Extensions.CommandLineUtils" Version="2.2.2" />
   </ItemGroup>
 
 </Project>
diff --git a/test/SharedFx.UnitTests/SharedFxTests.cs b/test/SharedFx.UnitTests/SharedFxTests.cs
index 36160360df..74956cde87 100644
--- a/test/SharedFx.UnitTests/SharedFxTests.cs
+++ b/test/SharedFx.UnitTests/SharedFxTests.cs
@@ -1,14 +1,77 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
+using System;
+using System.Collections.Generic;
 using System.IO;
+using System.IO.Compression;
+using System.Net;
+using System.Reflection;
+using System.Threading.Tasks;
+using McMaster.Extensions.CommandLineUtils;
 using Newtonsoft.Json.Linq;
+using TriageBuildFailures;
 using Xunit;
 
 namespace Microsoft.AspNetCore
 {
     public class SharedFxTests
     {
+
+        [Theory]
+        [MemberData(nameof(GetSharedFxConfig))]
+        public async Task BaselineTest(SharedFxConfig config)
+        {
+            var previousVersion = TestData.GetPreviousAspNetCoreReleaseVersion();
+            var url = new Uri($"https://dotnetcli.blob.core.windows.net/dotnet/aspnetcore/Runtime/" + previousVersion + "/aspnetcore-runtime-internal-" + previousVersion + "-win-x64.zip");
+            var zipName = "assemblies.zip";
+            var nugetAssemblyVersions = new Dictionary<string, Version>();
+            var root = TestData.GetDotNetRoot();
+            var dir = Path.Combine(root, "shared", config.Name, config.Version);
+
+            using (var testClient = new WebClient())
+            {
+                var reporter = new ConsoleReporter(PhysicalConsole.Singleton);
+                await RetryHelpers.RetryAsync(async () => await testClient.DownloadFileTaskAsync(url, zipName), reporter);
+            }
+
+            var zipPath = Path.Combine(AppContext.BaseDirectory, zipName);
+
+            if (!Directory.Exists(AppContext.BaseDirectory + "unzipped"))
+            {
+                ZipFile.ExtractToDirectory(AppContext.BaseDirectory, "unzipped");
+            }
+
+            var nugetAssembliesPath = Path.Combine(AppContext.BaseDirectory, "unzipped", "shared", config.Name, previousVersion);
+
+            var files = Directory.GetFiles(nugetAssembliesPath, "*.dll");
+            foreach (var file in files)
+            {
+                try
+                {
+                    var assemblyVersion = AssemblyName.GetAssemblyName(file).Version;
+                    var dllName = Path.GetFileName(file);
+                    nugetAssemblyVersions.Add(dllName, assemblyVersion);
+                }
+                catch (BadImageFormatException) { }
+            }
+
+            files = Directory.GetFiles(dir, "*.dll");
+
+            Assert.All(files, file =>
+            {
+                try
+                {
+                    var localAssemblyVersion = AssemblyName.GetAssemblyName(file).Version;
+                    var dllName = Path.GetFileName(file);
+                    Assert.True(nugetAssemblyVersions.ContainsKey(dllName), $"Expected {dllName} to be in the downloaded dlls");
+                    Assert.True(localAssemblyVersion.CompareTo(nugetAssemblyVersions[dllName]) >= 0, $"Expected the local version of {dllName} to be greater than or equal to the already released version.");
+                }
+                catch (BadImageFormatException) { }
+
+            });
+        }
+
         [Theory]
         [MemberData(nameof(GetSharedFxConfig))]
         public void ItContainsValidRuntimeConfigFile(SharedFxConfig config)
diff --git a/test/SharedFx.UnitTests/TestData.cs b/test/SharedFx.UnitTests/TestData.cs
index eb01f60e8b..dd024ae3bd 100644
--- a/test/SharedFx.UnitTests/TestData.cs
+++ b/test/SharedFx.UnitTests/TestData.cs
@@ -10,6 +10,8 @@ namespace Microsoft.AspNetCore
     {
         public static string GetPackageVersion() => GetTestDataValue("PackageVersion");
 
+        public static string GetPreviousAspNetCoreReleaseVersion() => GetTestDataValue("PreviousAspNetCoreReleaseVersion");
+
         public static string GetMicrosoftNETCoreAppPackageVersion() => GetTestDataValue("MicrosoftNETCoreAppPackageVersion");
 
         public static string GetDotNetRoot() => GetTestDataValue("DotNetRoot");