diff --git a/example/protobuf-async-message/consumer/tests/MessageHandler/PersonMessageHandlerTest.php b/example/protobuf-async-message/consumer/tests/MessageHandler/PersonMessageHandlerTest.php
index 3b4c683e..c528d47f 100644
--- a/example/protobuf-async-message/consumer/tests/MessageHandler/PersonMessageHandlerTest.php
+++ b/example/protobuf-async-message/consumer/tests/MessageHandler/PersonMessageHandlerTest.php
@@ -58,6 +58,26 @@ public function testInvoke(): void
                         'given' => $this->matcher->like($this->given),
                         'surname' => $this->matcher->like($this->surname),
                     ],
+                    'children' => $this->matcher->matchAll(
+                        ['Zane' => 12],
+                        [
+                            $this->matcher->eachKey(
+                                [],
+                                [$this->matcher->string()]
+                            ),
+                            $this->matcher->eachValue(
+                                [],
+                                [
+                                    $this->matcher->number(23),
+                                ],
+                            ),
+                            $this->matcher->atLeast(0),
+                            $this->matcher->atMost(3),
+                            // These matchers are allowed, but are not recommend
+                            // $this->matcher->atLeastLike(123, 2),
+                            // $this->matcher->atMostLike(234, 3),
+                        ],
+                    ),
                 ]),
                 'application/protobuf'
             ));
diff --git a/example/protobuf-async-message/library/proto/say_hello.proto b/example/protobuf-async-message/library/proto/say_hello.proto
index 7db28ef6..b64c26ac 100644
--- a/example/protobuf-async-message/library/proto/say_hello.proto
+++ b/example/protobuf-async-message/library/proto/say_hello.proto
@@ -5,6 +5,7 @@ package library;
 message Person {
   string id = 1;
   Name name = 2;
+  map<string, int32> children = 3;
 }
 
 message Name {