diff --git a/docs/rules/no-useless-constructor.md b/docs/rules/no-useless-constructor.md
index dbc0d8bce9f..cdfe5052ff4 100644
--- a/docs/rules/no-useless-constructor.md
+++ b/docs/rules/no-useless-constructor.md
@@ -8,7 +8,7 @@ class A {
     }
 }
 
-class A extends B {
+class B extends A {
     constructor (value) {
       super(value);
     }
@@ -32,7 +32,7 @@ class A {
     }
 }
 
-class A extends B {
+class B extends A {
     constructor (...args) {
       super(...args);
     }
@@ -52,13 +52,13 @@ class A {
     }
 }
 
-class A extends B {
+class B extends A {
     constructor() {
         super('foo');
     }
 }
 
-class A extends B {
+class B extends A {
     constructor() {
         super();
         doSomething();