diff --git a/dotnet/test/firefox/WebDriver.Firefox.Tests.csproj b/dotnet/test/firefox/WebDriver.Firefox.Tests.csproj
index 7be93afd80922..6bb606df1387c 100644
--- a/dotnet/test/firefox/WebDriver.Firefox.Tests.csproj
+++ b/dotnet/test/firefox/WebDriver.Firefox.Tests.csproj
@@ -45,7 +45,7 @@
 
   <ItemGroup>
     <PackageReference Include="NUnit" Version="3.12.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>