ERROR No tests to run. In docker

[maximkoev]

For load testing my tests run in docker containers. When I span 40+ containers in ~1-2 containers see testcafe error:
ERROR No tests to run. Either the test files contain no tests or the filter function is too restrictive.
here is how I start tests:

> gherkin-testcafe chrome:headless --tags @load && allure generate allure/allure-results --clean -o allure/allure-report

.testcafe.json

{
  "src": "./src/tests/",
  "reporter": [
    {
      "name": "list"
    },

    {
      "name": "allure",
      "output": "allure/res"
    }
  ],
  "appCommand": "",
  "assertionTimeout": 9000,
  "speed": 0.8,
  "concurrency": 1,