tape will complain if there is two exclusive test in the entire process

Error: there can only be one only test.log

Error: there can only be one only test
    at Function.test.only (/my-node-app/node_modules/tape/index.js:140:25)
    at Function.module.exports.lazyLoad.only (/my-node-app/node_modules/tape/index.js:26:34)
    at Object.<anonymous> (/my-node-app/test/api-endpoints/submit-registration-token.test.js:47:6)
    at Module._compile (module.js:624:30)
    at Object.Module._extensions..js (module.js:635:10)
    at Module.load (module.js:545:32)
    at tryModuleLoad (module.js:508:12)
    at Function.Module._load (module.js:500:3)
    at Module.require (module.js:568:17)
    at require (internal/module.js:11:18)
    at /my-node-app/node_modules/tape/bin/tape:38:9
    at Array.forEach (<anonymous>)
    at /my-node-app/node_modules/tape/bin/tape:37:11
    at Array.forEach (<anonymous>)
    at Object.<anonymous> (/my-node-app/node_modules/tape/bin/tape:28:8)
    at Module._compile (module.js:624:30)
npm ERR! Test failed.  See above for more details.

example-test-file.js

test.only('Register blah account with valid required inputs', t => {
  return request(app)
    .post('/api/whatever-tokens')
    .set('Content-Type', 'application/json')
    .send({
      token: chance.hash({length: SOME_LENGTH}),
    })
    .expect(200)
    .then(res => {
      t.equal(
        res.body.hasOwnProperty('createdAt'),
        true,
        'response body should contains createdAt'
      );
      t.end();
    })
    .catch(err => t.end(err));
});

test.only('Register blah account with valid required inputs', t => {
  return request(app)
    .post('/api/whatever-tokens')
    .set('Content-Type', 'application/json')
    .send({
      token: chance.hash({length: SOME_LENGTH}),
    })
    .expect(200)
    .then(res => {
      t.equal(
        res.body.hasOwnProperty('updatedAt'),
        true,
        'response body should contains updatedAt'
      );
      t.end();
    })
    .catch(err => t.end(err));
});