diff --git a/infra/util/src/test/java/org/apache/shardingsphere/infra/util/string/HexStringUtilTest.java b/infra/util/src/test/java/org/apache/shardingsphere/infra/util/string/HexStringUtilTest.java
index 091e2f2a50b64..99cda499fa0ee 100644
--- a/infra/util/src/test/java/org/apache/shardingsphere/infra/util/string/HexStringUtilTest.java
+++ b/infra/util/src/test/java/org/apache/shardingsphere/infra/util/string/HexStringUtilTest.java
@@ -26,8 +26,8 @@ class HexStringUtilTest {
     
     @Test
     void assertToHexString() {
-        assertThat(HexStringUtil.toHexString(new byte[] {(byte) 1}), is("01"));
-        assertThat(HexStringUtil.toHexString(new byte[] {(byte) 100}), is("64"));
-        assertThat(HexStringUtil.toHexString(new byte[] {(byte) 255, (byte) 256}), is("ff00"));
+        assertThat(HexStringUtil.toHexString(new byte[]{(byte) 1}), is("01"));
+        assertThat(HexStringUtil.toHexString(new byte[]{(byte) 100}), is("64"));
+        assertThat(HexStringUtil.toHexString(new byte[]{(byte) 255, (byte) 256}), is("ff00"));
     }
 }