diff --git a/tests/md5test.c b/tests/md5test.c
deleted file mode 100644
index 3e72dfe7..00000000
--- a/tests/md5test.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
- *
- *  Licensed under the Apache License, Version 2.0 (the License); you may
- *  not use this file except in compliance with the License.
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- */
-
-
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <gmssl/md5.h>
-#include <gmssl/hex.h>
-
-
-static char *teststr[] = {
-	"",
-	"a",
-	"abc",
-	"message digest",
-	"abcdefghijklmnopqrstuvwxyz",
-	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
-	"12345678901234567890123456789012345678901234567890123456789012345678901234567890",
-};
-
-static char *dgsthex[] = {
-	"d41d8cd98f00b204e9800998ecf8427e",
-	"0cc175b9c0f1b6a831c399e269772661",
-	"900150983cd24fb0d6963f7d28e17f72",
-	"f96b697d7cb7938d525a2f31aaf161d0",
-	"c3fcd3d76192e4007dfb496cca67e13b",
-	"d174ab98d277d9f5a5611c2c9f419d9f",
-	"57edf4a22be3c955ac49da2e2107b67a",
-};
-
-int main(int argc, char **argv)
-{
-	int err = 0;
-	uint8_t dgst[16];
-	uint8_t dgstbuf[16];
-	size_t dgstbuflen;
-	size_t i;
-
-	for (i = 0; i < sizeof(teststr)/sizeof(teststr[0]); i++) {
-		hex_to_bytes(dgsthex[i], strlen(dgsthex[i]), dgstbuf, &dgstbuflen);
-		md5_digest((uint8_t *)teststr[i], strlen(teststr[i]), dgst);
-
-		if (memcmp(dgstbuf, dgst, sizeof(dgst)) != 0) {
-			int n;
-			printf("error calculating MD5 on %s\n", teststr[i]);
-			printf(" digest(corret) = ");
-			for (n = 0; n < sizeof(dgst); n++) {
-				printf("%02X", dgst[n]);
-			}
-			printf("\n");
-			printf(" digest(error)  = %s\n", dgsthex[i]);
-			err++;
-		} else {
-			printf("md5 test %zu ok\n", i+1);
-		}
-	}
-
-	return err;
-}