diff --git a/packages/core/src/connectors/aliyun-dm/index.test.ts b/packages/core/src/connectors/aliyun-dm/index.test.ts
new file mode 100644
index 000000000..7552f485c
--- /dev/null
+++ b/packages/core/src/connectors/aliyun-dm/index.test.ts
@@ -0,0 +1,49 @@
+import { sendMessage, validateConfig } from '.';
+import { singleSendMail } from './single-send-mail';
+
+jest.mock('./single-send-mail');
+jest.mock('../utilities', () => ({
+  getConnectorConfig: async () => ({
+    accessKeyId: 'accessKeyId',
+    accessKeySecret: 'accessKeySecret',
+    accountName: 'accountName',
+    templates: [
+      {
+        usageType: 'SignIn',
+        content: 'Your code is {{code}}, {{code}} is your code',
+        subject: 'subject',
+      },
+    ],
+  }),
+}));
+
+describe('validateConfig()', () => {
+  it('should pass on valid config', async () => {
+    await expect(
+      validateConfig({
+        accessKeyId: 'accessKeyId',
+        accessKeySecret: 'accessKeySecret',
+        accountName: 'accountName',
+        templates: [],
+      })
+    ).resolves.not.toThrow();
+  });
+  it('throws if config is invalid', async () => {
+    await expect(validateConfig({})).rejects.toThrow();
+  });
+});
+
+describe('sendMessage()', () => {
+  it('should call singleSendMail() and replace code in content', async () => {
+    await sendMessage('to@email.com', 'SignIn', { code: '1234' });
+    expect(singleSendMail).toHaveBeenCalledWith(
+      expect.objectContaining({
+        HtmlBody: 'Your code is 1234, 1234 is your code',
+      }),
+      expect.anything()
+    );
+  });
+  it('throws if template is missing', async () => {
+    await expect(sendMessage('to@email.com', 'Register', { code: '1234' })).rejects.toThrow();
+  });
+});
diff --git a/packages/core/src/connectors/aliyun-dm/index.ts b/packages/core/src/connectors/aliyun-dm/index.ts
index 1920853d4..569710f97 100644
--- a/packages/core/src/connectors/aliyun-dm/index.ts
+++ b/packages/core/src/connectors/aliyun-dm/index.ts
@@ -45,10 +45,6 @@ const configGuard = z.object({
 });
 
 export const validateConfig: ValidateConfig = async (config: unknown) => {
-  if (!config) {
-    throw new ConnectorError(ConnectorErrorCodes.InvalidConfig, 'Missing config');
-  }
-
   const result = configGuard.safeParse(config);
 
   if (!result.success) {
@@ -82,7 +78,7 @@ export const sendMessage: EmailSendMessageFunction = async (address, type, data)
       Subject: template.subject,
       HtmlBody:
         typeof data.code === 'string'
-          ? template.content.replaceAll('{{code}}', data.code)
+          ? template.content.replace(/{{code}}/g, data.code)
           : template.content,
     },
     accessKeySecret