diff --git a/src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTupleEqualityTests.cs b/src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTupleEqualityTests.cs
index 19c256599754e..ede8ef7edd68c 100644
--- a/src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTupleEqualityTests.cs
+++ b/src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTupleEqualityTests.cs
@@ -1728,7 +1728,7 @@ static void verify(CSharpCompilation comp, bool inferDelegate)
                 Assert.Equal("System.Int32 j", model.GetSymbolInfo(j).Symbol.ToTestDisplayString());
             }
 
-            static void verifyType(string expectedType, ITypeSymbol? type, bool inferDelegate)
+            static void verifyType(string expectedType, ITypeSymbol type, bool inferDelegate)
             {
                 if (inferDelegate)
                 {