diff --git a/Remotely.sln b/Remotely.sln
index 2c433d93..b762e834 100644
--- a/Remotely.sln
+++ b/Remotely.sln
@@ -53,6 +53,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Desktop.Win.Tests", "Tests\
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tests", "Tests", "{0754E195-7080-4AAC-B5A3-A9923B1283CE}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Shared.Tests", "Tests\Shared.Tests\Shared.Tests.csproj", "{B6C1030D-1F74-4143-BB70-FC79C0274653}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -195,6 +197,18 @@ Global
 		{162C54FB-FEEC-490B-9105-103AD30A10F7}.Release|x64.Build.0 = Release|Any CPU
 		{162C54FB-FEEC-490B-9105-103AD30A10F7}.Release|x86.ActiveCfg = Release|Any CPU
 		{162C54FB-FEEC-490B-9105-103AD30A10F7}.Release|x86.Build.0 = Release|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Debug|x64.Build.0 = Debug|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Debug|x86.Build.0 = Debug|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Release|x64.ActiveCfg = Release|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Release|x64.Build.0 = Release|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Release|x86.ActiveCfg = Release|Any CPU
+		{B6C1030D-1F74-4143-BB70-FC79C0274653}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -203,6 +217,7 @@ Global
 		{48D9D0E6-5781-44A9-84C0-56F56C2A1193} = {0754E195-7080-4AAC-B5A3-A9923B1283CE}
 		{6C25240C-613D-4A86-A04E-784BA6726094} = {0754E195-7080-4AAC-B5A3-A9923B1283CE}
 		{162C54FB-FEEC-490B-9105-103AD30A10F7} = {0754E195-7080-4AAC-B5A3-A9923B1283CE}
+		{B6C1030D-1F74-4143-BB70-FC79C0274653} = {0754E195-7080-4AAC-B5A3-A9923B1283CE}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {EAE10B28-119B-437C-9E68-06F0EE3F968A}
diff --git a/Server.Installer/Services/ServerInstaller.cs b/Server.Installer/Services/ServerInstaller.cs
index 46c0c7b4..4a875f89 100644
--- a/Server.Installer/Services/ServerInstaller.cs
+++ b/Server.Installer/Services/ServerInstaller.cs
@@ -43,7 +43,7 @@ namespace Server.Installer.Services
 
                 using var httpClient = new HttpClient();
                 var response = await httpClient.GetAsync(releaseFile);
-                var contentLength = (double?)response.Content.Headers.ContentLength;
+                var contentLength = response.Content.Headers.ContentLength;
 
                 using var webStream = await response.Content.ReadAsStreamAsync();
                 using var fileStream = new FileStream(zipPath, FileMode.Create);
@@ -59,7 +59,7 @@ namespace Server.Installer.Services
 
                     }
 
-                    var newProgress = bytesRead / contentLength * 100;
+                    var newProgress = (double)bytesRead / contentLength * 100;
 
                     if (newProgress == 100 ||
                         newProgress - progress > 5)
diff --git a/Tests/Shared.Tests/Shared.Tests.csproj b/Tests/Shared.Tests/Shared.Tests.csproj
new file mode 100644
index 00000000..4d2bac6f
--- /dev/null
+++ b/Tests/Shared.Tests/Shared.Tests.csproj
@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+
+    <AssemblyName>Remotely.Shared.Tests</AssemblyName>
+
+    <RootNamespace>Remotely.Shared.Tests</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.2.8" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.2.8" />
+    <PackageReference Include="coverlet.collector" Version="3.1.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Shared\Shared.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/Tests/Shared.Tests/StreamExtensionsTests.cs b/Tests/Shared.Tests/StreamExtensionsTests.cs
new file mode 100644
index 00000000..3b2559ce
--- /dev/null
+++ b/Tests/Shared.Tests/StreamExtensionsTests.cs
@@ -0,0 +1,30 @@
+using System.Security.Cryptography;
+using Remotely.Shared.Extensions;
+
+namespace Remotely.Shared.Tests
+{
+    [TestClass]
+    public class StreamExtensionsTests
+    {
+        [TestMethod]
+        public async Task CopyToAsyncTest()
+        {
+            var bufferSize = 500_000;
+            var srcBuffer = new byte[bufferSize];
+            RandomNumberGenerator.Fill(srcBuffer);
+
+            using var src = new MemoryStream(srcBuffer);
+            using var dst = new MemoryStream();
+
+            var amounts = new List<int>();
+
+            await src.CopyToAsync(dst, bytesRead =>
+            {
+                amounts.Add(bytesRead);
+            });
+
+            Assert.IsTrue(amounts.Any());
+            Assert.AreEqual(bufferSize, amounts.Last());
+        }
+    }
+}
\ No newline at end of file
diff --git a/Tests/Shared.Tests/Usings.cs b/Tests/Shared.Tests/Usings.cs
new file mode 100644
index 00000000..ab67c7ea
--- /dev/null
+++ b/Tests/Shared.Tests/Usings.cs
@@ -0,0 +1 @@
+global using Microsoft.VisualStudio.TestTools.UnitTesting;
\ No newline at end of file