diff a/test/jdk/java/security/KeyAgreement/KeySizeTest.java b/test/jdk/java/security/KeyAgreement/KeySizeTest.java
--- a/test/jdk/java/security/KeyAgreement/KeySizeTest.java
+++ b/test/jdk/java/security/KeyAgreement/KeySizeTest.java
@@ -25,11 +25,10 @@
  * @test
  * @bug 8184359
  * @summary KeyLength support test for DiffieHellman, EC, XDH.
  *  Arguments order <KeyExchangeAlgorithm> <Provider> <KeyGenAlgorithm> <keyLen>
  * @library /test/lib
- * @build jdk.test.lib.Convert
  * @run main KeySizeTest DiffieHellman SunJCE DiffieHellman 512
  * @run main KeySizeTest DiffieHellman SunJCE DiffieHellman 768
  * @run main KeySizeTest DiffieHellman SunJCE DiffieHellman 832
  * @run main KeySizeTest DiffieHellman SunJCE DiffieHellman 1024
  * @run main KeySizeTest DiffieHellman SunJCE DiffieHellman 2048
@@ -53,14 +52,14 @@
 import java.security.interfaces.XECPublicKey;
 import java.security.spec.PKCS8EncodedKeySpec;
 import java.security.spec.X509EncodedKeySpec;
 import java.security.spec.NamedParameterSpec;
 import java.util.Arrays;
+import java.util.Hex;
 import javax.crypto.KeyAgreement;
 import javax.crypto.interfaces.DHPrivateKey;
 import javax.crypto.interfaces.DHPublicKey;
-import jdk.test.lib.Convert;
 
 public class KeySizeTest {
 
     public static void main(String[] args) throws Exception {
 
@@ -228,11 +227,11 @@
 
     private static boolean equals(byte[] actual, byte[] expected) {
         boolean equals = Arrays.equals(actual, expected);
         if (!equals) {
             throw new RuntimeException(String.format("Actual array: %s, "
-                    + "Expected array:%s", Convert.byteArrayToHexString(actual),
-                    Convert.byteArrayToHexString(expected)));
+                            + "Expected array:%s", Hex.encoder().encode(actual),
+                    Hex.encoder().encode(expected)));
         }
         return equals;
     }
 }