diff --git a/src/nunit.analyzers.tests/DiagnosticSuppressors/DereferencePossiblyNullReferenceSuppressorTests.cs b/src/nunit.analyzers.tests/DiagnosticSuppressors/DereferencePossiblyNullReferenceSuppressorTests.cs
index 2d62618a..a894a85b 100644
--- a/src/nunit.analyzers.tests/DiagnosticSuppressors/DereferencePossiblyNullReferenceSuppressorTests.cs
+++ b/src/nunit.analyzers.tests/DiagnosticSuppressors/DereferencePossiblyNullReferenceSuppressorTests.cs
@@ -1017,7 +1017,15 @@ private static string GetStringSuppress(HasString? str) // argument is nullable
                     return str.Inner; // warning: possible null reference return
                 }
 
-                private record HasString(string? Inner);
+                private sealed class HasString
+                {
+                    public HasString(string? inner)
+                    {                   
+                        Inner = inner;
+                    }
+
+                    public string? Inner { get; }
+                }
             ");
 
             RoslynAssert.Suppressed(suppressor,