diff --git a/unit/test-hog.c b/unit/test-hog.c
index bc23b58..116a5cb 100644
--- a/unit/test-hog.c
+++ b/unit/test-hog.c
@@ -79,13 +79,6 @@ struct context {
 		tester_add(name, &data, NULL, function, NULL);     \
 	} while (0)
 
-static void test_debug(const char *str, void *user_data)
-{
-	const char *prefix = user_data;
-
-	tester_debug("%s%s", prefix, str);
-}
-
 static gboolean context_quit(gpointer user_data)
 {
 	struct context *context = user_data;
@@ -117,7 +110,7 @@ static gboolean send_pdu(gpointer user_data)
 
 	len = write(context->fd, pdu->data, pdu->size);
 
-	util_hexdump('<', pdu->data, len, test_debug, "hog: ");
+	tester_monitor('<', 0x0004, 0x0000, pdu->data, len);
 
 	g_assert_cmpint(len, ==, pdu->size);
 
@@ -152,7 +145,7 @@ static gboolean test_handler(GIOChannel *channel, GIOCondition cond,
 
 	g_assert(len > 0);
 
-	util_hexdump('>', buf, len, test_debug, "hog: ");
+	tester_monitor('>', 0x0004, 0x0000, buf, len);
 
 	g_assert_cmpint(len, ==, pdu->size);