diff --git a/Behavioral/DesignPatterns.Strategy.UnitTests/DesignPatterns.Strategy.UnitTests.csproj b/Behavioral/DesignPatterns.Strategy.UnitTests/DesignPatterns.Strategy.UnitTests.csproj
new file mode 100644
index 0000000..18755de
--- /dev/null
+++ b/Behavioral/DesignPatterns.Strategy.UnitTests/DesignPatterns.Strategy.UnitTests.csproj
@@ -0,0 +1,36 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <IsPackable>false</IsPackable>
+        <IsTestProject>true</IsTestProject>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="AutoFixture" Version="4.18.1" />
+        <PackageReference Include="FluentAssertions" Version="6.12.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Moq" Version="4.20.70" />
+        <PackageReference Include="Shouldly" Version="4.2.1" />
+        <PackageReference Include="xunit" Version="2.6.5" />
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
+        <PackageReference Include="coverlet.collector" Version="6.0.0">
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
+        <PackageReference Include="coverlet.msbuild" Version="6.0.0">
+            <PrivateAssets>all</PrivateAssets>
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\DesignPatterns.Strategy\DesignPatterns.Strategy.csproj" />
+    </ItemGroup>
+
+</Project>
diff --git a/Behavioral/DesignPatterns.Strategy.UnitTests/MergeSortingStrategyTests.cs b/Behavioral/DesignPatterns.Strategy.UnitTests/MergeSortingStrategyTests.cs
new file mode 100644
index 0000000..af7819c
--- /dev/null
+++ b/Behavioral/DesignPatterns.Strategy.UnitTests/MergeSortingStrategyTests.cs
@@ -0,0 +1,43 @@
+using Shouldly;
+using Xunit;
+
+namespace DesignPatterns.Strategy.UnitTests;
+
+public class MergeSortingStrategyTests
+{
+    [Fact]
+    public void GivenUnsortedNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var unsortedList = new List<int> { 34, 7, 23, 32, 5, 62, 12, 19, 4, 47 };
+        var strategy = new MergeSortingStrategy();
+        strategy.Sort(unsortedList);
+        unsortedList.ShouldBe([4, 5, 7, 12, 19, 23, 32, 34, 47, 62]);
+    }
+
+    [Fact]
+    public void GivenSortedNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var sortedList = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+        var strategy = new MergeSortingStrategy();
+        strategy.Sort(sortedList);
+        sortedList.ShouldBe([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+    }
+
+    [Fact]
+    public void GivenReverseSortedNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var reverseSortedList = new List<int> { 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
+        var strategy = new MergeSortingStrategy();
+        strategy.Sort(reverseSortedList);
+        reverseSortedList.ShouldBe([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+    }
+
+    [Fact]
+    public void GivenNoNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var emptyList = new List<int>();
+        var strategy = new MergeSortingStrategy();
+        strategy.Sort(emptyList);
+        emptyList.ShouldBe(new List<int>());
+    }
+}
diff --git a/Behavioral/DesignPatterns.Strategy.UnitTests/QuickSortingStrategyTests.cs b/Behavioral/DesignPatterns.Strategy.UnitTests/QuickSortingStrategyTests.cs
new file mode 100644
index 0000000..0a97cff
--- /dev/null
+++ b/Behavioral/DesignPatterns.Strategy.UnitTests/QuickSortingStrategyTests.cs
@@ -0,0 +1,43 @@
+using Shouldly;
+using Xunit;
+
+namespace DesignPatterns.Strategy.UnitTests;
+
+public class QuickSortingStrategyTests
+{
+    [Fact]
+    public void GivenUnsortedNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var unsortedList = new List<int> { 34, 7, 23, 32, 5, 62, 12, 19, 4, 47 };
+        var strategy = new QuickSortingStrategy();
+        strategy.Sort(unsortedList);
+        unsortedList.ShouldBe([4, 5, 7, 12, 19, 23, 32, 34, 47, 62]);
+    }
+
+    [Fact]
+    public void GivenSortedNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var sortedList = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+        var strategy = new QuickSortingStrategy();
+        strategy.Sort(sortedList);
+        sortedList.ShouldBe([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+    }
+
+    [Fact]
+    public void GivenReverseSortedNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var reverseSortedList = new List<int> { 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
+        var strategy = new QuickSortingStrategy();
+        strategy.Sort(reverseSortedList);
+        reverseSortedList.ShouldBe([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+    }
+
+    [Fact]
+    public void GivenNoNumbers_WhenSort_ThenResultAsExpected()
+    {
+        var emptyList = new List<int>();
+        var strategy = new QuickSortingStrategy();
+        strategy.Sort(emptyList);
+        emptyList.ShouldBe(new List<int>());
+    }
+}
diff --git a/Behavioral/DesignPatterns.Strategy/MergeSortingStrategy.cs b/Behavioral/DesignPatterns.Strategy/MergeSortingStrategy.cs
index a6741e1..5d5368f 100644
--- a/Behavioral/DesignPatterns.Strategy/MergeSortingStrategy.cs
+++ b/Behavioral/DesignPatterns.Strategy/MergeSortingStrategy.cs
@@ -4,7 +4,9 @@ public class MergeSortingStrategy : ISortingStrategy
 {
     public void Sort<T>(List<T> list) where T : IComparable<T>
     {
-        list = this.MergeSort(list);
+        var sortedList = this.MergeSort(list);
+        list.Clear();
+        list.AddRange(sortedList);
     }
 
     private List<T> MergeSort<T>(List<T> list) where T : IComparable<T>
diff --git a/Behavioral/DesignPatterns.Visitor.UnitTests/DesignPatterns.Visitor.UnitTests.csproj b/Behavioral/DesignPatterns.Visitor.UnitTests/DesignPatterns.Visitor.UnitTests.csproj
index c9e5c6a..5208fcb 100644
--- a/Behavioral/DesignPatterns.Visitor.UnitTests/DesignPatterns.Visitor.UnitTests.csproj
+++ b/Behavioral/DesignPatterns.Visitor.UnitTests/DesignPatterns.Visitor.UnitTests.csproj
@@ -4,7 +4,6 @@
         <TargetFramework>net8.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
-        <RootNamespace>DesignPatterns.Visitor.UnitTests</RootNamespace>
         <IsPackable>false</IsPackable>
         <IsTestProject>true</IsTestProject>
     </PropertyGroup>
diff --git a/DesignPatterns.sln b/DesignPatterns.sln
index 77b52b8..cc90883 100644
--- a/DesignPatterns.sln
+++ b/DesignPatterns.sln
@@ -32,6 +32,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.Builder.Unit
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.Strategy", "Behavioral\DesignPatterns.Strategy\DesignPatterns.Strategy.csproj", "{847A94E0-6BC0-4604-B182-0A445CC550AD}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DesignPatterns.Strategy.UnitTests", "Behavioral\DesignPatterns.Strategy.UnitTests\DesignPatterns.Strategy.UnitTests.csproj", "{625CD08D-2C39-42B2-BAB6-B75DE65F00E6}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -90,6 +92,10 @@ Global
 		{847A94E0-6BC0-4604-B182-0A445CC550AD}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{847A94E0-6BC0-4604-B182-0A445CC550AD}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{847A94E0-6BC0-4604-B182-0A445CC550AD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{625CD08D-2C39-42B2-BAB6-B75DE65F00E6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{625CD08D-2C39-42B2-BAB6-B75DE65F00E6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{625CD08D-2C39-42B2-BAB6-B75DE65F00E6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{625CD08D-2C39-42B2-BAB6-B75DE65F00E6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{DCE06EB6-BAB5-4573-AF67-128DBCCDB90C} = {7FF0E83F-EBEB-4103-BCD1-2F100E82FCD1}
@@ -105,5 +111,6 @@ Global
 		{727C96E6-5B0E-43BE-BB4E-2D06F40E51BF} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
 		{774BAD81-C8DA-4491-B53C-F023A8235AA7} = {AE005ED4-5F0B-4AF9-81AE-AAE3AD6F8901}
 		{847A94E0-6BC0-4604-B182-0A445CC550AD} = {7FF0E83F-EBEB-4103-BCD1-2F100E82FCD1}
+		{625CD08D-2C39-42B2-BAB6-B75DE65F00E6} = {7FF0E83F-EBEB-4103-BCD1-2F100E82FCD1}
 	EndGlobalSection
 EndGlobal