diff --git a/tests/suites/test_suite_version.function b/tests/suites/test_suite_version.function
index 10f9e11..7d59794 100644
--- a/tests/suites/test_suite_version.function
+++ b/tests/suites/test_suite_version.function
@@ -52,7 +52,7 @@
     mbedtls_version_get_string( get_str );
     mbedtls_version_get_string_full( get_str_full );
 
-    mbedtls_snprintf( build_str, 100, "%d.%d.%d",
+    mbedtls_snprintf( build_str, 100, "%u.%u.%u",
         (get_int >> 24) & 0xFF,
         (get_int >> 16) & 0xFF,
         (get_int >> 8) & 0xFF );
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index 85ff41d..f3e83d6 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -237,7 +237,7 @@
     char *p = *buf;
     size_t n = *size;
 
-    ret = mbedtls_snprintf( p, n, "type : %u", san->type );
+    ret = mbedtls_snprintf( p, n, "type : %d", san->type );
     MBEDTLS_X509_SAFE_SNPRINTF;
 
     switch( san->type )