diff --git a/test/test_bcd.c b/test/test_bcd.c
index 82b7598..96dc6fb 100644
--- a/test/test_bcd.c
+++ b/test/test_bcd.c
@@ -40,6 +40,7 @@ START_TEST (test_2bcd_2_filler)
     fail_if(len != 2, "len is %zu", len);
     fail_if(bcd[0] != 0x21,"was 0x%x",bcd[0]);
     fail_if(bcd[1] != 0xf3,"was 0x%x",bcd[1]);
+    fail_if(UC_BCD_LEN(strlen(ascii)) != len);
 END_TEST
 
 START_TEST (test_2bcd_3_filler)
@@ -98,6 +99,7 @@ START_TEST (test_2hex_1)
     fail_if(ascii[2] != '3',"2 was %c",ascii[2]);
     fail_if(ascii[3] != '4',"3 was %c",ascii[3]);
     fail_if(ascii[4] !=  0, "4 was %c",ascii[4]);
+    fail_if(UC_ASCII_LEN(sizeof bcd) != len);
 END_TEST
 
 START_TEST (test_2hex_2)