diff --git a/TUnit.Core.SourceGenerator/CodeGenerators/LanguageVersionCheckGenerator.cs b/TUnit.Core.SourceGenerator/CodeGenerators/LanguageVersionCheckGenerator.cs
new file mode 100644
index 0000000000..48a1ff8ab1
--- /dev/null
+++ b/TUnit.Core.SourceGenerator/CodeGenerators/LanguageVersionCheckGenerator.cs
@@ -0,0 +1,42 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+
+namespace TUnit.Core.SourceGenerator;
+
+[Generator]
+public class LanguageVersionCheckGenerator : IIncrementalGenerator
+{
+    public void Initialize(IncrementalGeneratorInitializationContext context)
+    {
+        var settings = context.CompilationProvider
+            .Select((c, _)  => 
+            {
+                LanguageVersion? csharpVersion = c is CSharpCompilation comp
+                    ? comp.LanguageVersion
+                    : null;
+                
+                return csharpVersion;
+            });
+
+        context.RegisterSourceOutput(settings, static (sourceProductionContext, languageVersion) =>
+        {
+            if (languageVersion is null)
+            {
+                return;
+            }
+            
+            if((int)languageVersion.Value < 1200)
+            {
+                sourceProductionContext.ReportDiagnostic(Diagnostic.Create(
+                    new DiagnosticDescriptor(
+                        "TUNIT_LANG_001",
+                        "Language Version Check",
+                        "TUnit requires C# 12 or higher when using Source Generation.",
+                        "Usage",
+                        DiagnosticSeverity.Error,
+                        true),
+                    Location.None));
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/TUnit.Engine/TUnit.Engine.props b/TUnit.Engine/TUnit.Engine.props
index bc9b6a2c9b..3bf80f5228 100644
--- a/TUnit.Engine/TUnit.Engine.props
+++ b/TUnit.Engine/TUnit.Engine.props
@@ -7,7 +7,6 @@
         <TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
         <TestingPlatformShowTestsFailure>true</TestingPlatformShowTestsFailure>
         <TestingPlatformCaptureOutput>false</TestingPlatformCaptureOutput>
-        <LangVersion>latest</LangVersion>
         <OutputType>Exe</OutputType>
         <GenerateProgramFile>false</GenerateProgramFile>
     </PropertyGroup>
diff --git a/TUnit.Engine/TUnit.Engine.targets b/TUnit.Engine/TUnit.Engine.targets
index 9908ae471d..e1ab616fe2 100644
--- a/TUnit.Engine/TUnit.Engine.targets
+++ b/TUnit.Engine/TUnit.Engine.targets
@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
-    
+
+    <PropertyGroup>
+        <LangVersion Condition="'$(LangVersion)' == ''">latest</LangVersion>
+    </PropertyGroup>
+
     <ItemGroup Condition="'$(TUnitImplicitUsings)' == 'true'">
         <Using Include="TUnit.Core" />
     </ItemGroup>
@@ -13,4 +17,4 @@
         <AssemblyMetadata Include="TUnitReflectionScanner" Value="true" />
     </ItemGroup>
 
-</Project>
+</Project>
\ No newline at end of file
diff --git a/TUnit.TestProject.VB.NET/TUnit.TestProject.VB.NET.vbproj b/TUnit.TestProject.VB.NET/TUnit.TestProject.VB.NET.vbproj
index 7a6918c49a..504c6d87f3 100644
--- a/TUnit.TestProject.VB.NET/TUnit.TestProject.VB.NET.vbproj
+++ b/TUnit.TestProject.VB.NET/TUnit.TestProject.VB.NET.vbproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+    <PropertyGroup>
+        <LangVersion>latest</LangVersion>
+    </PropertyGroup>
+
     <Import Project="..\TestProject.props" />
 
     <PropertyGroup>
diff --git a/TUnit/TUnit.props b/TUnit/TUnit.props
index 860822c9b1..d03d97b2d0 100644
--- a/TUnit/TUnit.props
+++ b/TUnit/TUnit.props
@@ -7,7 +7,6 @@
         <TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
         <TestingPlatformShowTestsFailure>true</TestingPlatformShowTestsFailure>
         <TestingPlatformCaptureOutput>false</TestingPlatformCaptureOutput>
-        <LangVersion>latest</LangVersion>
         <OutputType>Exe</OutputType>
     </PropertyGroup>
 
diff --git a/TUnit/TUnit.targets b/TUnit/TUnit.targets
index 341ff22152..5a237a978c 100644
--- a/TUnit/TUnit.targets
+++ b/TUnit/TUnit.targets
@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
 
+    <PropertyGroup>
+        <LangVersion Condition="'$(LangVersion)' == ''">latest</LangVersion>
+    </PropertyGroup>
+
     <ItemGroup Condition="'$(TUnitImplicitUsings)' == 'true'">
         <Using Include="TUnit.Core" />
         <Using Include="TUnit.Core.HookType" Static="True" />