diff --git a/src/csharp/Grpc.Core.Tests/SanityTest.cs b/src/csharp/Grpc.Core.Tests/SanityTest.cs
index 73efad1f842..eaad409ec0b 100644
--- a/src/csharp/Grpc.Core.Tests/SanityTest.cs
+++ b/src/csharp/Grpc.Core.Tests/SanityTest.cs
@@ -65,13 +65,13 @@ namespace Grpc.Core.Tests
                 {
                     foreach (var m in t.GetMethods())
                     {
-                        var attributes = m.GetCustomAttributes(typeof(NUnit.Framework.TestAttribute), true);
-                        if (attributes.Length > 0)
+                        var testAttributes = m.GetCustomAttributes(typeof(NUnit.Framework.TestAttribute), true);
+                        var testCaseAttributes = m.GetCustomAttributes(typeof(NUnit.Framework.TestCaseAttribute), true);
+                        if (testAttributes.Length > 0 || testCaseAttributes.Length > 0)
                         {
                             testClasses.Add(t.FullName);
                             break;
                         }
-
                     }
                 }
                 testClasses.Sort();