TestCafe unable to use testController (t) outside of test run (e.g. as a conditional to skip a test)

I'm trying to check which browser we're running tests on, and then skip a test/fixture based on the result (as mentioned in this TestCafe Issue).

import { t } from 'testcafe';

fixture `test`
    .page('https://testcafe.devexpress.com')

if (t.browser.name.includes('Chrome')) {
  test('is Chrome?', async () => {
    console.log(t.browser.name);
    await t.expect(t.browser.name.includes('Chrome').ok();
  });
} else {
  test.skip('is Chrome?')
};

Results in...

ERROR Cannot prepare tests due to an error.

Cannot implicitly resolve the test run in the context of which the test controller action should be executed. Use test function's 't' argument instead.

Is there any way I can call the testObject (t) outside of the test?