diff --git a/test/call.c b/test/call.c
index cf5bad7c42..03242edae3 100644
--- a/test/call.c
+++ b/test/call.c
@@ -1868,6 +1868,13 @@ static int test_media_base(enum audio_mode txmode,
 	mem_deref(auplay);
 	module_unload("ausine");
 
+	conf_config()->audio.txmode = AUDIO_MODE_POLL;
+	conf_config()->audio.src_fmt  = AUFMT_S16LE;
+	conf_config()->audio.channels_src = 0;
+	conf_config()->audio.play_fmt = AUFMT_S16LE;
+	conf_config()->audio.enc_fmt  = AUFMT_S16LE;
+	conf_config()->audio.dec_fmt  = AUFMT_S16LE;
+
 	if (fix.err)
 		return fix.err;