diff --git a/tests/Invisionware.Collections.Tests/Invisionware.Collections.Tests.csproj b/tests/Invisionware.Collections.Tests/Invisionware.Collections.Tests.csproj
index ddcc5c5..a3dbe6e 100644
--- a/tests/Invisionware.Collections.Tests/Invisionware.Collections.Tests.csproj
+++ b/tests/Invisionware.Collections.Tests/Invisionware.Collections.Tests.csproj
@@ -10,7 +10,7 @@
 	<ItemGroup>
 		<PackageReference Include="FluentAssertions" Version="5.10.2" />
 		<PackageReference Include="nunit" Version="3.12.0" />
-		<PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
+		<PackageReference Include="NUnit3TestAdapter" Version="4.0.0" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
 		<PackageReference Include="Serilog" Version="2.9.0" />
 	</ItemGroup>