from typing import List
from typing import Tuple


def nondegenerate_tests_two_variables() -> List[Tuple[float, float, float, float, float]]:
    """Each entry in the list represents two Gaussian variables X1, X2 in the following format:
    (mean1, mean2, sigma1, sigma2, correlation between X1 and X2)
    """
    return [
        (1.0, 2.0, 0.5, 0.7, 0.4),
        (1.0, 3.0, 0.5, 1.0, 0.1),
        (0.0, 1.0, 10.0, 2.0, 0.3),
        (0.8, 1.0, 0.1, 0.2, 0.7),
    ]