diff --git a/tests/NSubstitute.Documentation.Tests/NSubstitute.Documentation.Tests.csproj b/tests/NSubstitute.Documentation.Tests/NSubstitute.Documentation.Tests.csproj
index c7e75a03..138609e7 100644
--- a/tests/NSubstitute.Documentation.Tests/NSubstitute.Documentation.Tests.csproj
+++ b/tests/NSubstitute.Documentation.Tests/NSubstitute.Documentation.Tests.csproj
@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="NUnit" Version="4.4.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="5.2.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>