pytest: Transfer some tests from one thread to another thread

Question

I have some accounts as json file. It look like:

  "accounts": [
    {
      "email": "email1",
      "password": "qwerty",
      "is_busy": false
    },
    {
      "email": "email2",
      "password": "qwerty",
      "is_busy": false
    },
    {
      "email": "email3",
      "password": "qwerty",
      "is_busy": false
    }
  ]
}

I'm running my test with the -n flag where after n thread counts (the number of accounts in the json file) each account is needed to get a work resource. My code is trying to find an account for which is_busy is set to false and then set that value to true. So the second thread will also try to search, only for 2 accounts because 1 account is busy. When all threads are running, each account from the json will have the is_busy flag set to true. If one of the threads terminates, I want it to run tests from another thread. Example:

class TestA:
    def test_one_a(self):
        time.sleep(200)
    
    def test_second_a(self):
        time.sleep(200)

class TestB:
    def test_one_b(self):
        time.sleep(10)
    
    def test_second_b(self):
        time.sleep(15)

Here, if TestA is the first thread and TestB is the second thread, then TestB will complete faster than TestA. And I want TestB to take the test named test_second_a and run it on the first thread and TestB won't run this test. I want to implement the same for accounts