Update TestRestApiBase.
diff --git a/has-project/has-server/src/test/java/org/apache/kerby/has/server/TestRestApiBase.java b/has-project/has-server/src/test/java/org/apache/kerby/has/server/TestRestApiBase.java
index 681bf2d..21d650f 100644
--- a/has-project/has-server/src/test/java/org/apache/kerby/has/server/TestRestApiBase.java
+++ b/has-project/has-server/src/test/java/org/apache/kerby/has/server/TestRestApiBase.java
@@ -55,6 +55,7 @@
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
+import java.nio.charset.StandardCharsets;
import static org.junit.Assert.assertEquals;
@@ -251,9 +252,9 @@
BufferedReader reader = httpConn.getResponseCode()
== HttpURLConnection.HTTP_OK ? new BufferedReader(
new InputStreamReader(httpConn.getInputStream(),
- "UTF-8")) : new BufferedReader(
+ StandardCharsets.UTF_8)) : new BufferedReader(
new InputStreamReader(httpConn.getErrorStream(),
- "UTF-8"));
+ StandardCharsets.UTF_8));
System.out.println(reader.readLine());
} catch (IOException | AuthenticationException e) {