diff --git a/.travis.yml b/.travis.yml
index 88dc295..b76bad9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ node_js:
   - '6'
   - '8'
   - '10'
+  - '12'
+  - '14'
 install:
   - npm i npminstall && npminstall
 before_script:
diff --git a/lib/client.js b/lib/client.js
index a886789..b486753 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -10,6 +10,10 @@ const promisify = require('pify');
 
 module.exports = RDSClient;
 module.exports.literals = require('./literals');
+module.exports.escape = mysql.escape;
+module.exports.escapeId = mysql.escapeId;
+module.exports.format = mysql.format;
+module.exports.raw = mysql.raw;
 
 function RDSClient(options) {
   if (!(this instanceof RDSClient)) {
diff --git a/package.json b/package.json
index db01a22..196285c 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "eslint": "^3.19.0",
     "eslint-config-egg": "^3.2.0",
     "istanbul": "*",
-    "mocha": "*",
+    "mocha": "8",
     "thunk-mocha": "*"
   },
   "homepage": "https://github.com/ali-sdk/ali-rds",
diff --git a/test/client.test.js b/test/client.test.js
index 5752a05..c1246dd 100644
--- a/test/client.test.js
+++ b/test/client.test.js
@@ -2,6 +2,7 @@
 
 const co = require('co');
 const assert = require('assert');
+const mysql = require('mysql');
 const rds = require('../');
 const config = require('./config');
 
@@ -901,4 +902,20 @@ describe('client.test.js', function() {
       }).catch(done);
     });
   });
+
+  describe('export', () => {
+    it('export escape', function() {
+      assert(rds.escape && rds.escape === mysql.escape);
+    });
+    it('export escapeId', function() {
+      assert(rds.escapeId && rds.escapeId === mysql.escapeId);
+    });
+    it('export format', function() {
+      assert(rds.format && rds.format === mysql.format);
+    });
+    it('export raw', function() {
+      assert(rds.raw && rds.raw === mysql.raw);
+    });
+  });
+
 });