diff --git a/tests/RandomExtended.Tests/RandomExtended.Tests.csproj b/tests/RandomExtended.Tests/RandomExtended.Tests.csproj
index 68af1fea..2f1f592b 100644
--- a/tests/RandomExtended.Tests/RandomExtended.Tests.csproj
+++ b/tests/RandomExtended.Tests/RandomExtended.Tests.csproj
@@ -6,7 +6,7 @@
     </PropertyGroup>
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-        <PackageReference Include="NUnit" Version="3.13.3" />
+        <PackageReference Include="NUnit" Version="4.0.0" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     </ItemGroup>
     <ItemGroup>
diff --git a/tests/Sharpy.Builder.Tests/Sharpy.Builder.Tests.csproj b/tests/Sharpy.Builder.Tests/Sharpy.Builder.Tests.csproj
index be10af3e..9218dea2 100644
--- a/tests/Sharpy.Builder.Tests/Sharpy.Builder.Tests.csproj
+++ b/tests/Sharpy.Builder.Tests/Sharpy.Builder.Tests.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit" Version="4.0.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 
diff --git a/tests/Sharpy.Core.Tests/Sharpy.Core.Tests.csproj b/tests/Sharpy.Core.Tests/Sharpy.Core.Tests.csproj
index b925a88e..02950cff 100644
--- a/tests/Sharpy.Core.Tests/Sharpy.Core.Tests.csproj
+++ b/tests/Sharpy.Core.Tests/Sharpy.Core.Tests.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit" Version="4.0.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 
diff --git a/tests/Sharpy.ReactiveBuilder.Tests/Sharpy.ReactiveBuilder.Tests.csproj b/tests/Sharpy.ReactiveBuilder.Tests/Sharpy.ReactiveBuilder.Tests.csproj
index 32c0af85..3244b97d 100644
--- a/tests/Sharpy.ReactiveBuilder.Tests/Sharpy.ReactiveBuilder.Tests.csproj
+++ b/tests/Sharpy.ReactiveBuilder.Tests/Sharpy.ReactiveBuilder.Tests.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit" Version="4.0.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 
diff --git a/tests/Sharpy.Tests/Sharpy.Tests.csproj b/tests/Sharpy.Tests/Sharpy.Tests.csproj
index 66c5457d..1710ec96 100644
--- a/tests/Sharpy.Tests/Sharpy.Tests.csproj
+++ b/tests/Sharpy.Tests/Sharpy.Tests.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit" Version="4.0.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>