diff --git a/apollo-biz/src/test/java/com/ctrip/framework/apollo/biz/service/ItemSetServiceTest.java b/apollo-biz/src/test/java/com/ctrip/framework/apollo/biz/service/ItemSetServiceTest.java
index 9e7e5f9644f..e1dce5a16ba 100644
--- a/apollo-biz/src/test/java/com/ctrip/framework/apollo/biz/service/ItemSetServiceTest.java
+++ b/apollo-biz/src/test/java/com/ctrip/framework/apollo/biz/service/ItemSetServiceTest.java
@@ -49,6 +49,9 @@ public class ItemSetServiceTest extends AbstractIntegrationTest {
   @Sql(scripts = "/sql/clean.sql", executionPhase = Sql.ExecutionPhase.AFTER_TEST_METHOD)
   public void testUpdateSetWithoutItemNumLimit() {
 
+    when(bizConfig.itemKeyLengthLimit()).thenReturn(128);
+    when(bizConfig.itemValueLengthLimit()).thenReturn(20000);
+
     when(bizConfig.isItemNumLimitEnabled()).thenReturn(false);
     when(bizConfig.itemNumLimit()).thenReturn(5);
 
@@ -74,6 +77,9 @@ public void testUpdateSetWithoutItemNumLimit() {
   @Sql(scripts = "/sql/clean.sql", executionPhase = Sql.ExecutionPhase.AFTER_TEST_METHOD)
   public void testUpdateSetWithItemNumLimit() {
 
+    when(bizConfig.itemKeyLengthLimit()).thenReturn(128);
+    when(bizConfig.itemValueLengthLimit()).thenReturn(20000);
+
     when(bizConfig.isItemNumLimitEnabled()).thenReturn(true);
     when(bizConfig.itemNumLimit()).thenReturn(5);
 
@@ -104,6 +110,9 @@ public void testUpdateSetWithItemNumLimit() {
   @Sql(scripts = "/sql/clean.sql", executionPhase = Sql.ExecutionPhase.AFTER_TEST_METHOD)
   public void testUpdateSetWithItemNumLimit2() {
 
+    when(bizConfig.itemKeyLengthLimit()).thenReturn(128);
+    when(bizConfig.itemValueLengthLimit()).thenReturn(20000);
+
     when(bizConfig.isItemNumLimitEnabled()).thenReturn(true);
     when(bizConfig.itemNumLimit()).thenReturn(5);