Fixed Issue #452: typo corrected.
diff --git a/LanguageFeatures/Extension-methods/semantics_of_invocations_t05.dart b/LanguageFeatures/Extension-methods/semantics_of_invocations_t05.dart
index 523a375..eac0bdb 100644
--- a/LanguageFeatures/Extension-methods/semantics_of_invocations_t05.dart
+++ b/LanguageFeatures/Extension-methods/semantics_of_invocations_t05.dart
@@ -20,8 +20,7 @@
 class A<T1, T2, T3> {}
 
 extension ExtendedA<T1, T2, T3> on A<T1, T2, T3> {
-  void test(dynamic expected, expected1, expected2, expected3) {
-    Expect.equals(expected, T);
+  void test(dynamic expected1, expected2, expected3) {
     Expect.equals(expected1, T1);
     Expect.equals(expected2, T2);
     Expect.equals(expected3, T3);