diff --git a/unit/test-sdp.c b/unit/test-sdp.c
index 315a5cd..e9cbcdf 100644
--- a/unit/test-sdp.c
+++ b/unit/test-sdp.c
@@ -68,34 +68,22 @@ struct test_data {
 		.cont_len = cont,				\
 	}
 
-#define define_test(name, args...) \
+#define define_test(name, _mtu, args...) \
 	do {								\
 		const struct sdp_pdu pdus[] = {				\
 			args, { }, { }					\
 		};							\
 		static struct test_data data;				\
-		data.mtu = 48;						\
+		data.mtu = _mtu;					\
 		data.pdu_list = g_malloc(sizeof(pdus));			\
 		memcpy(data.pdu_list, pdus, sizeof(pdus));		\
 		g_test_add_data_func(name, &data, test_sdp);		\
 	} while (0)
 
-#define define_ss(name, args...) define_test("/TP/SERVER/SS/" name, args)
-#define define_sa(name, args...) define_test("/TP/SERVER/SA/" name, args)
-#define define_ssa(name, args...) define_test("/TP/SERVER/SSA/" name, args)
-
-#define define_brw(name, args...) \
-	do {								\
-		const struct sdp_pdu pdus[] = {				\
-			args, { }, { }					\
-		};							\
-		static struct test_data data;				\
-		data.mtu = 672;						\
-		data.pdu_list = g_malloc(sizeof(pdus));			\
-		memcpy(data.pdu_list, pdus, sizeof(pdus));		\
-		g_test_add_data_func("/TP/SERVER/BRW/" name,		\
-						&data, test_sdp);	\
-	} while (0)
+#define define_ss(name, args...) define_test("/TP/SERVER/SS/" name, 48, args)
+#define define_sa(name, args...) define_test("/TP/SERVER/SA/" name, 48, args)
+#define define_ssa(name, args...) define_test("/TP/SERVER/SSA/" name, 48, args)
+#define define_brw(name, args...) define_test("/TP/SERVER/BRW/" name, 672, args)
 
 struct context {
 	GMainLoop *main_loop;