diff --git a/code/Binary.SourceGeneration.ObjectCrossTests/InheritanceTests/InterfaceShadowingTests.cs b/code/Binary.SourceGeneration.ObjectCrossTests/InheritanceTests/InterfaceShadowingTests.cs
index 95fbab09..cb28de06 100644
--- a/code/Binary.SourceGeneration.ObjectCrossTests/InheritanceTests/InterfaceShadowingTests.cs
+++ b/code/Binary.SourceGeneration.ObjectCrossTests/InheritanceTests/InterfaceShadowingTests.cs
@@ -155,7 +155,7 @@ public void CompareInheritanceTest(Type x, Type y, int expected)
         Assert.NotNull(symbolX);
         Assert.NotNull(symbolY);
 
-        var symbolResult = Symbols.CompareInheritance(compilation, symbolX, symbolY, CancellationToken.None);
+        var symbolResult = Symbols.CompareInheritance(compilation, symbolX, symbolY);
         var memberResult = reflectionFunction.Invoke(x, y);
         Assert.Equal(expected, symbolResult);
         Assert.Equal(expected, memberResult);
@@ -184,7 +184,7 @@ public void CompareInheritanceWithInvalidTypeTest(Type x, Type y, string message
         Assert.NotNull(symbolX);
         Assert.NotNull(symbolY);
 
-        var alpha = Assert.Throws<ArgumentException>(() => Symbols.CompareInheritance(compilation, symbolX, symbolY, CancellationToken.None));
+        var alpha = Assert.Throws<ArgumentException>(() => Symbols.CompareInheritance(compilation, symbolX, symbolY));
         var bravo = Assert.Throws<ArgumentException>(() => reflectionFunction.Invoke(x, y));
         Assert.Null(alpha.ParamName);
         Assert.Null(bravo.ParamName);
@@ -236,19 +236,4 @@ public void GetAllFieldsAndPropertiesForNonInterfaceTypeWithInvalidTypeTest(Type
         Assert.Equal(message, alpha.Message);
         Assert.Equal(message, bravo.Message);
     }
-
-    [Fact(DisplayName = "Compare Inheritance With Cancellation Token Test")]
-    public void CompareInheritanceCancellationTest()
-    {
-        var source = new CancellationTokenSource();
-        var compilation = CompilationModule.CreateCompilationFromThisAssembly();
-        var symbolString = compilation.GetSpecialType(SpecialType.System_String);
-        var symbolObject = compilation.GetSpecialType(SpecialType.System_Object);
-        var result = Symbols.CompareInheritance(compilation, symbolObject, symbolString, source.Token);
-        Assert.Equal(1, result);
-
-        source.Cancel();
-        var exception = Assert.Throws<OperationCanceledException>(() => Symbols.CompareInheritance(compilation, symbolObject, symbolString, source.Token));
-        Assert.Equal(source.Token, exception.CancellationToken);
-    }
 }
diff --git a/code/Binary.SourceGeneration/Symbols.cs b/code/Binary.SourceGeneration/Symbols.cs
index 0d3d8882..04529971 100644
--- a/code/Binary.SourceGeneration/Symbols.cs
+++ b/code/Binary.SourceGeneration/Symbols.cs
@@ -209,11 +209,10 @@ public static ImmutableArray<ISymbol> FilterFieldsAndProperties(ImmutableArray<I
         return builder.ToImmutable();
     }
 
-    public static int CompareInheritance(Compilation compilation, ITypeSymbol x, ITypeSymbol y, CancellationToken cancellation)
+    public static int CompareInheritance(Compilation compilation, ITypeSymbol x, ITypeSymbol y)
     {
         if (x.IsValueType || y.IsValueType)
             throw new ArgumentException("Require reference type.");
-        cancellation.ThrowIfCancellationRequested();
         var alpha = compilation.ClassifyCommonConversion(x, y);
         var bravo = compilation.ClassifyCommonConversion(y, x);
         if (alpha.IsIdentity || bravo.IsIdentity)
@@ -243,11 +242,12 @@ void Insert(IPropertySymbol member)
             {
                 foreach (var i in values)
                 {
-                    var signal = CompareInheritance(compilation, i.ContainingType, member.ContainingType, cancellation);
+                    var signal = CompareInheritance(compilation, i.ContainingType, member.ContainingType);
                     if (signal is 0)
                         same.Add(i);
                     else if (signal is -1)
                         less.Add(i);
+                    cancellation.ThrowIfCancellationRequested();
                 }
             }