diff --git a/hutool-core/src/test/java/cn/hutool/core/util/StrUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/util/StrUtilTest.java
index 54d37836a..7c3bd2be8 100644
--- a/hutool-core/src/test/java/cn/hutool/core/util/StrUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/util/StrUtilTest.java
@@ -562,8 +562,21 @@ public class StrUtilTest {
 	@Test
 	public void briefTest3() {
 		String str = "123abc";
-		int maxLength = 3;
+
+		int maxLength = 6;
 		String brief = StrUtil.brief(str, maxLength);
+		Assert.assertEquals(str, brief);
+
+		maxLength = 5;
+		brief = StrUtil.brief(str, maxLength);
+		Assert.assertEquals("1...c", brief);
+
+		maxLength = 4;
+		brief = StrUtil.brief(str, maxLength);
+		Assert.assertEquals("1..c", brief);
+
+		maxLength = 3;
+		brief = StrUtil.brief(str, maxLength);
 		Assert.assertEquals("1.c", brief);
 
 		maxLength = 2;