diff --git a/src/brei-shared.c b/src/brei-shared.c
index b0a7d75..1db1f7a 100644
--- a/src/brei-shared.c
+++ b/src/brei-shared.c
@@ -482,7 +482,10 @@ MUNIT_TEST(test_brei_marshal)
 	const char *str = "eierspeise";
 
 	{
-		_unref_(brei_result) *result =  brei_marshal_va(brei, buf, "noiusf", 5, 0xab, 0xcd, -13, 0xfffd, str, 1.45);
+		_unref_(brei_result) *result = brei_marshal_va(brei, buf, "noiusf", 5,
+							       (object_id_t)0xab, (object_id_t)0xcd,
+							       (int32_t)-13, (uint32_t)0xfffd,
+							       str, 1.45);
 		munit_assert_ptr_null(result);
 	}
 
@@ -509,7 +512,10 @@ MUNIT_TEST(test_brei_marshal_bad_sig)
 	const char *str = "eierspeise";
 
 	{
-		_unref_(brei_result) *result  = brei_marshal_va(brei, buf, "noiusf", 5, 0xab, 0xcd, -13, 0xfffd, str, 1.45);
+		_unref_(brei_result) *result = brei_marshal_va(brei, buf, "noiusf", 5,
+							       (object_id_t)0xab, (object_id_t)0xcd,
+							       (int32_t)-13, (uint32_t)0xfffd,
+							       str, 1.45);
 		munit_assert_ptr_null(result);
 	}
 
@@ -630,7 +636,8 @@ MUNIT_TEST(test_brei_send_message)
 		uint32_t opcode = 3;
 		const char *signature = "ison";
 		int rc = brei_send_message_va(sock_write, id, opcode, signature, 4,
-					      -42, string, 0xab, 0xcdef);
+					      (int32_t)-42, string,
+					      (object_id_t)0xab, (object_id_t)0xcdef);
 		munit_assert_int(rc, ==, msglen);
 
 		uint32_t buf[64];