diff --git a/tester/dtmf_tester.c b/tester/dtmf_tester.c
index c73e05acc..3523fd339 100644
--- a/tester/dtmf_tester.c
+++ b/tester/dtmf_tester.c
@@ -22,9 +22,7 @@
 void dtmf_received(LinphoneCore *lc, LinphoneCall *call, int dtmf) {
 	stats* counters = get_stats(lc);
 	char** dst = &counters->dtmf_list_received;
-	*dst = *dst ?
-				ms_strcat_printf(*dst, "%c", dtmf)
-				: ms_strdup_printf("%c", dtmf);
+	*dst = *dst ? ms_strcat_printf(*dst, "%c", dtmf) : ms_strdup_printf("%c", dtmf);
 	counters->dtmf_count++;
 }
 
diff --git a/tester/tester.c b/tester/tester.c
index cd8481381..58607dec7 100644
--- a/tester/tester.c
+++ b/tester/tester.c
@@ -107,6 +107,8 @@ 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);
 	if (counters->last_received_info_message) linphone_info_message_unref(counters->last_received_info_message);
+	if (counters->dtmf_list_received) bctbx_free(counters->dtmf_list_received);
+
 	memset(counters,0,sizeof(stats));
 }
 
@@ -504,6 +506,8 @@ void linphone_core_manager_uninit(LinphoneCoreManager *mgr) {
 	if (mgr->cbs)
 		linphone_core_cbs_unref(mgr->cbs);
 
+	reset_counters(&mgr->stat);
+
 	manager_count--;
 	linphone_core_set_log_level_mask(old_log_level);
 }