diff --git a/tests/TPP.ArgsParsing.Tests/TPP.ArgsParsing.Tests.csproj b/tests/TPP.ArgsParsing.Tests/TPP.ArgsParsing.Tests.csproj
index 8d28f7b9..0de3a4e9 100644
--- a/tests/TPP.ArgsParsing.Tests/TPP.ArgsParsing.Tests.csproj
+++ b/tests/TPP.ArgsParsing.Tests/TPP.ArgsParsing.Tests.csproj
@@ -6,7 +6,7 @@
 
     <ItemGroup>
         <PackageReference Include="NSubstitute" Version="5.1.0" />
-        <PackageReference Include="nunit" Version="3.13.3" />
+        <PackageReference Include="nunit" Version="4.0.1" />
         <PackageReference Include="NUnit.Analyzers" Version="3.6.0">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/tests/TPP.Common.Tests/TPP.Common.Tests.csproj b/tests/TPP.Common.Tests/TPP.Common.Tests.csproj
index 5c0ea8f6..99335173 100644
--- a/tests/TPP.Common.Tests/TPP.Common.Tests.csproj
+++ b/tests/TPP.Common.Tests/TPP.Common.Tests.csproj
@@ -5,7 +5,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="nunit" Version="3.13.3" />
+        <PackageReference Include="nunit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.4.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     </ItemGroup>
diff --git a/tests/TPP.Core.Tests/TPP.Core.Tests.csproj b/tests/TPP.Core.Tests/TPP.Core.Tests.csproj
index 54b2c9d5..2ba62a1c 100644
--- a/tests/TPP.Core.Tests/TPP.Core.Tests.csproj
+++ b/tests/TPP.Core.Tests/TPP.Core.Tests.csproj
@@ -6,7 +6,7 @@
 
     <ItemGroup>
         <PackageReference Include="NSubstitute" Version="5.1.0" />
-        <PackageReference Include="nunit" Version="3.13.3" />
+        <PackageReference Include="nunit" Version="4.0.1" />
         <PackageReference Include="NUnit.Analyzers" Version="3.6.0">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/tests/TPP.Inputting.Tests/TPP.Inputting.Tests.csproj b/tests/TPP.Inputting.Tests/TPP.Inputting.Tests.csproj
index 56d48819..ce9a5a03 100644
--- a/tests/TPP.Inputting.Tests/TPP.Inputting.Tests.csproj
+++ b/tests/TPP.Inputting.Tests/TPP.Inputting.Tests.csproj
@@ -5,7 +5,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="nunit" Version="3.13.3" />
+        <PackageReference Include="nunit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.4.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     </ItemGroup>
diff --git a/tests/TPP.Match.Tests/TPP.Match.Tests.csproj b/tests/TPP.Match.Tests/TPP.Match.Tests.csproj
index 2f086627..fdc0848c 100644
--- a/tests/TPP.Match.Tests/TPP.Match.Tests.csproj
+++ b/tests/TPP.Match.Tests/TPP.Match.Tests.csproj
@@ -6,7 +6,7 @@
 
     <ItemGroup>
         <PackageReference Include="NSubstitute" Version="5.1.0" />
-        <PackageReference Include="nunit" Version="3.13.3" />
+        <PackageReference Include="nunit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.4.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     </ItemGroup>
diff --git a/tests/TPP.Persistence.MongoDB.Tests/TPP.Persistence.MongoDB.Tests.csproj b/tests/TPP.Persistence.MongoDB.Tests/TPP.Persistence.MongoDB.Tests.csproj
index 04b07faf..583e6491 100644
--- a/tests/TPP.Persistence.MongoDB.Tests/TPP.Persistence.MongoDB.Tests.csproj
+++ b/tests/TPP.Persistence.MongoDB.Tests/TPP.Persistence.MongoDB.Tests.csproj
@@ -7,7 +7,7 @@
     <ItemGroup>
         <PackageReference Include="MongoDB.Driver" Version="2.19.0" />
         <PackageReference Include="NSubstitute" Version="5.1.0" />
-        <PackageReference Include="nunit" Version="3.13.3" />
+        <PackageReference Include="nunit" Version="4.0.1" />
         <PackageReference Include="NUnit.Analyzers" Version="3.6.0">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>