diff --git a/src/test/java/xyz/zhouxy/plusone/commons/util/RefTests.java b/src/test/java/xyz/zhouxy/plusone/commons/base/RefTests.java
similarity index 89%
rename from src/test/java/xyz/zhouxy/plusone/commons/util/RefTests.java
rename to src/test/java/xyz/zhouxy/plusone/commons/base/RefTests.java
index 34e9fa3..76708dd 100644
--- a/src/test/java/xyz/zhouxy/plusone/commons/util/RefTests.java
+++ b/src/test/java/xyz/zhouxy/plusone/commons/base/RefTests.java
@@ -14,19 +14,13 @@
  * limitations under the License.
  */
 
-package xyz.zhouxy.plusone.commons.util;
+package xyz.zhouxy.plusone.commons.base;
 
 import static org.junit.jupiter.api.Assertions.*;
 
 import org.junit.jupiter.api.Test;
 
 import lombok.extern.slf4j.Slf4j;
-import xyz.zhouxy.plusone.commons.base.BoolRef;
-import xyz.zhouxy.plusone.commons.base.CharRef;
-import xyz.zhouxy.plusone.commons.base.DoubleRef;
-import xyz.zhouxy.plusone.commons.base.IntRef;
-import xyz.zhouxy.plusone.commons.base.LongRef;
-import xyz.zhouxy.plusone.commons.base.Ref;
 
 @Slf4j
 class RefTests {
diff --git a/src/test/java/xyz/zhouxy/plusone/commons/util/MyBatisSqlBuilderTests.java b/src/test/java/xyz/zhouxy/plusone/commons/sql/MyBatisSqlBuilderTests.java
similarity index 92%
rename from src/test/java/xyz/zhouxy/plusone/commons/util/MyBatisSqlBuilderTests.java
rename to src/test/java/xyz/zhouxy/plusone/commons/sql/MyBatisSqlBuilderTests.java
index 419914a..8576ad5 100644
--- a/src/test/java/xyz/zhouxy/plusone/commons/util/MyBatisSqlBuilderTests.java
+++ b/src/test/java/xyz/zhouxy/plusone/commons/sql/MyBatisSqlBuilderTests.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package xyz.zhouxy.plusone.commons.util;
+package xyz.zhouxy.plusone.commons.sql;
 
 import static xyz.zhouxy.plusone.commons.sql.MyBatisSql.IN;
 
@@ -22,8 +22,6 @@ import org.junit.jupiter.api.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import xyz.zhouxy.plusone.commons.sql.MyBatisSql;
-
 class MyBatisSqlBuilderTests {
     private static final Logger log = LoggerFactory.getLogger(MyBatisSqlBuilderTests.class);