Intermediate hexify out change
diff --git a/tests/suites/test_suite_pem.function b/tests/suites/test_suite_pem.function
index c24595d..222d581 100644
--- a/tests/suites/test_suite_pem.function
+++ b/tests/suites/test_suite_pem.function
@@ -6,16 +6,13 @@
 /* END_HEADER */
 
 /* BEGIN_CASE depends_on:MBEDTLS_PEM_WRITE_C */
-void mbedtls_pem_write_buffer( char *start, char *end, char *buf_str, char *result_str )
+void mbedtls_pem_write_buffer( char * start, char * end, uint8_t * buf,
+                               uint32_t buf_len, char * result_str )
 {
-    unsigned char buf[5000];
     unsigned char *check_buf = NULL;
     int ret;
-    size_t buf_len, olen = 0, olen2 = 0;
+    size_t olen = 0, olen2 = 0;
 
-    memset( buf, 0, sizeof( buf ) );
-
-    buf_len = unhexify( buf, buf_str );
 
     ret = mbedtls_pem_write_buffer( start, end, buf, buf_len, NULL, 0, &olen );
     TEST_ASSERT( ret == MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );
@@ -23,7 +20,6 @@
     check_buf = (unsigned char *) mbedtls_calloc( 1, olen );
     TEST_ASSERT( check_buf != NULL );
 
-    memset( check_buf, 0, olen );
     ret = mbedtls_pem_write_buffer( start, end, buf, buf_len, check_buf, olen, &olen2 );
 
     TEST_ASSERT( olen2 <= olen );