diff --git a/tests/api.c b/tests/api.c
index 319eb48f6a..9bda2d1ec7 100644
--- a/tests/api.c
+++ b/tests/api.c
@@ -41245,9 +41245,9 @@ static int test_wolfSSL_X509_bad_altname(void)
     };
 
     X509* x509 = NULL;
-    int certSize = sizeof(malformed_alt_name_cert) / sizeof(unsigned char);
+    int certSize = (int)sizeof(malformed_alt_name_cert) / sizeof(unsigned char);
     const char *name = "aaaaa";
-    int nameLen = (int)strlen(name);
+    int nameLen = (int)XSTRLEN(name);
 
     ExpectNotNull(x509 = wolfSSL_X509_load_certificate_buffer(
         malformed_alt_name_cert, certSize, SSL_FILETYPE_ASN1));