diff --git a/mediastreamer2 b/mediastreamer2
index 64ef6099d..b83b82d67 160000
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 64ef6099d47713d83dfb3bccdb505bf2b6060287
+Subproject commit b83b82d67692b5a93de5194c3503dc61828d4051
diff --git a/tester/tester.c b/tester/tester.c
index 6ed1d5267..4e8f29fdf 100644
--- a/tester/tester.c
+++ b/tester/tester.c
@@ -226,6 +226,12 @@ LinphoneCoreManager* linphone_core_manager_new2(const char* rc_file, int check_f
 	else
 		proxy_count=0;
 
+#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, "AU: Audio Unit Tester");
+#endif
+
 	if (proxy_count)
 		wait_for_until(mgr->lc,NULL,&mgr->stat.number_of_LinphoneRegistrationOk,proxy_count,5000*proxy_count);
 	CU_ASSERT_EQUAL(mgr->stat.number_of_LinphoneRegistrationOk,proxy_count);