diff --git a/test/solidlsp/csharp/test_csharp_basic.py b/test/solidlsp/csharp/test_csharp_basic.py
index 77ce7bc6..3e83171b 100644
--- a/test/solidlsp/csharp/test_csharp_basic.py
+++ b/test/solidlsp/csharp/test_csharp_basic.py
@@ -24,6 +24,7 @@ def csharp_ls() -> SolidLanguageServer:
         server.stop()
 
 
+@pytest.mark.csharp
 class TestCSharpBasic:
     """Basic tests for C# language server."""