diff --git a/tester/tester.c b/tester/tester.c
index 7c6ac48da..7cb44fc36 100644
--- a/tester/tester.c
+++ b/tester/tester.c
@@ -40,6 +40,7 @@ const char* test_password="secret";
 const char* test_route="sip2.linphone.org";
 int liblinphone_tester_use_log_file=0;
 static int liblinphone_tester_keep_accounts_flag = 0;
+static int manager_count = 0;
 
 #if WINAPI_FAMILY_PHONE_APP
 const char *liblinphone_tester_file_prefix="Assets";
@@ -259,11 +260,17 @@ LinphoneCoreManager* linphone_core_manager_new2(const char* rc_file, int check_f
 	else
 		proxy_count=0;
 
+	manager_count++;
+
 #if TARGET_OS_IPHONE
 	linphone_core_set_playback_device( mgr->lc, "AU: Audio Unit Tester");
 	linphone_core_set_capture_device( mgr->lc, "AU: Audio Unit Tester");
 	linphone_core_set_ringer_device( mgr->lc, "AQ: Audio Queue Device");
 	linphone_core_set_ringback(mgr->lc, NULL);
+	if( manager_count >= 2){
+		ms_message("Manager for '%s' using files", rc_file ? rc_file : "--");
+		linphone_core_use_files(mgr->lc, TRUE);
+	}
 #endif
 
 	if (proxy_count)
@@ -295,6 +302,7 @@ void linphone_core_manager_destroy(LinphoneCoreManager* mgr) {
 	if (mgr->lc) linphone_core_destroy(mgr->lc);
 	if (mgr->identity) linphone_address_destroy(mgr->identity);
 	if (mgr->stat.last_received_chat_message) linphone_chat_message_unref(mgr->stat.last_received_chat_message);
+	manager_count--;
 	ms_free(mgr);
 }