Dash unit tests with dash_duo always result in TestingTimeoutError

I recently started using Dash for developing web applications. In order to improve the quality of my code, I began writing unit tests for these applications.

I followed the tutorials in the Dash documentation (https://dash.plotly.com/testing) and installed ChromeDriver and all other needed dependencies. When running the example unit tests from the Dash Documentation, every test that used dash_duo failed with a TestingTimeoutError. The unit tests that don't use dash_duo run just fine, but every single test that uses dash_duo fails with a TestingTimeoutError.

Eventually, I wrote a super simple test:

import dash
from dash import html

def test_001_test_dash_duo(dash_duo):
    x = 2
    assert x == 2

Even this test fails with a timeout error:

msg = 'expected condition not met within timeout'

    def until(
        wait_cond, timeout, poll=0.1, msg="expected condition not met within timeout"
    ):  # noqa: C0330
        res = wait_cond()
        logger.debug(
            "start wait.until with method, timeout, poll => %s %s %s",
            wait_cond,
            timeout,
            poll,
        )
        end_time = time.time() + timeout
        while not res:
            if time.time() > end_time:
>               raise TestingTimeoutError(msg)
E               dash.testing.errors.TestingTimeoutError: expected condition not met within timeout

Any ideas of what is needed to get Dash unit tests using dash_duo to not fail by timeout?