diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
new file mode 100644
index 00000000..e580227f
--- /dev/null
+++ b/.github/workflows/pr-build.yml
@@ -0,0 +1,66 @@
+name: SonarCloud
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  build:
+    name: Build .NET and Analyse with SonarCloud
+    runs-on: windows-latest
+    steps:
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          java-version: 17
+          distribution: 'zulu'
+      - uses: actions/checkout@v3
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v3
+        with:
+          path: ~\sonar\cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+      - name: Cache SonarCloud scanner
+        id: cache-sonar-scanner
+        uses: actions/cache@v3
+        with:
+          path: .\.sonar\scanner
+          key: ${{ runner.os }}-sonar-scanner
+          restore-keys: ${{ runner.os }}-sonar-scanner
+      - name: Install SonarCloud scanner
+        if: steps.cache-sonar-scanner.outputs.cache-hit != 'true'
+        shell: powershell
+        run: |
+          New-Item -Path .\.sonar\scanner -ItemType Directory
+          dotnet tool update dotnet-sonarscanner --tool-path .\.sonar\scanner
+      - name: Install Coverage Tool
+        shell: powershell
+        run: |
+          dotnet tool install --global dotnet-coverage
+      - name: Prepare SonarCloud analysis
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        shell: powershell
+        run: >
+          .\.sonar\scanner\dotnet-sonarscanner begin
+          /k:"team-zomsa_aplib.net" /o:"team-zomsa"
+          /d:sonar.token="${{ secrets.SONAR_TOKEN }}"
+          /d:sonar.host.url="https://sonarcloud.io"
+          /d:sonar.cs.vscoveragexml.reportsPaths=coverage.xml
+      - name: Build the project
+        shell: powershell
+        run: |
+          dotnet build --no-incremental
+      - name: Test the project
+        shell: powershell
+        run: | 
+          dotnet-coverage collect "dotnet test" -f xml -o "coverage.xml"
+      - name: Run SonarCloud analysis
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        shell: powershell
+        run: |
+          .\.sonar\scanner\dotnet-sonarscanner end /d:sonar.token="${{ secrets.SONAR_TOKEN }}"
diff --git a/Aplib.Core/SonarTest.cs b/Aplib.Core/SonarTest.cs
new file mode 100644
index 00000000..6b871815
--- /dev/null
+++ b/Aplib.Core/SonarTest.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace Aplib.Core
+{
+    public class SonarTest
+    {
+        public void Main() => Console.WriteLine("Hello World!");
+    }
+}
diff --git a/Aplib.Net.sln b/Aplib.Net.sln
index b06a17f4..24528aa3 100644
--- a/Aplib.Net.sln
+++ b/Aplib.Net.sln
@@ -3,7 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.8.34525.116
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Aplib.Core", "Aplib.Core\Aplib.Core.csproj", "{0ED50CC0-F90F-44D4-830E-2F3BACE040EC}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Aplib.Core", "Aplib.Core\Aplib.Core.csproj", "{0ED50CC0-F90F-44D4-830E-2F3BACE040EC}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Aplib.Tests", "Aplib.Tests\Aplib.Tests.csproj", "{67D4F6C5-758D-489F-A100-8B259B2158D2}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
 		{0ED50CC0-F90F-44D4-830E-2F3BACE040EC}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0ED50CC0-F90F-44D4-830E-2F3BACE040EC}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0ED50CC0-F90F-44D4-830E-2F3BACE040EC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{67D4F6C5-758D-489F-A100-8B259B2158D2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{67D4F6C5-758D-489F-A100-8B259B2158D2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{67D4F6C5-758D-489F-A100-8B259B2158D2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{67D4F6C5-758D-489F-A100-8B259B2158D2}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/Aplib.Tests/Aplib.Tests.csproj b/Aplib.Tests/Aplib.Tests.csproj
new file mode 100644
index 00000000..67ed265b
--- /dev/null
+++ b/Aplib.Tests/Aplib.Tests.csproj
@@ -0,0 +1,29 @@
+<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="Microsoft.NET.Test.Sdk" Version="17.6.0" />
+    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+      <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>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Aplib.Core\Aplib.Core.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/Aplib.Tests/GlobalUsings.cs b/Aplib.Tests/GlobalUsings.cs
new file mode 100644
index 00000000..8c927eb7
--- /dev/null
+++ b/Aplib.Tests/GlobalUsings.cs
@@ -0,0 +1 @@
+global using Xunit;
\ No newline at end of file
diff --git a/Aplib.Tests/SonarTest.cs b/Aplib.Tests/SonarTest.cs
new file mode 100644
index 00000000..86f10414
--- /dev/null
+++ b/Aplib.Tests/SonarTest.cs
@@ -0,0 +1,13 @@
+namespace Aplib.Tests;
+
+public class SonarTest
+{
+    [Fact]
+    public void TestMain()
+    {
+        Core.SonarTest test = new();
+        test.Main();
+
+        Assert.True(true);
+    }
+}
\ No newline at end of file