diff --git a/tester/message_tester.c b/tester/message_tester.c
index a44973227..784acb49b 100644
--- a/tester/message_tester.c
+++ b/tester/message_tester.c
@@ -358,6 +358,7 @@ static void text_message_with_ack(void) {
 		CU_ASSERT_TRUE(wait_for(pauline->lc,marie->lc,&marie->stat.number_of_LinphoneMessageReceived,1));
 		CU_ASSERT_TRUE(wait_for(pauline->lc,marie->lc,&pauline->stat.number_of_LinphoneMessageDelivered,1));
 		CU_ASSERT_EQUAL(pauline->stat.number_of_LinphoneMessageInProgress,1);
+
 		linphone_core_manager_destroy(marie);
 		linphone_core_manager_destroy(pauline);
 	}
diff --git a/tester/tester.c b/tester/tester.c
index 98186c134..b705a8912 100644
--- a/tester/tester.c
+++ b/tester/tester.c
@@ -103,6 +103,7 @@ static void auth_info_requested(LinphoneCore *lc, const char *realm, const char
 
 
 void reset_counters( stats* counters) {
+	if (counters->last_received_chat_message) linphone_chat_message_unref(counters->last_received_chat_message);
 	memset(counters,0,sizeof(stats));
 }