diff --git a/api-test/frontend/src/business/definition/ApiDefinition.vue b/api-test/frontend/src/business/definition/ApiDefinition.vue
index fd77fd70d2..68af44f1eb 100644
--- a/api-test/frontend/src/business/definition/ApiDefinition.vue
+++ b/api-test/frontend/src/business/definition/ApiDefinition.vue
@@ -1127,6 +1127,10 @@ export default {
   margin-top: 10px;
 }
 
+:deep(.el-tabs__nav-wrap) {
+  width: calc(100% - 250px);
+}
+
 .ms-api-button {
   position: absolute;
   right: 10px;