def test_minos_contour():
dataset = MyDataset()
dataset.models.parameters["x"].frozen = True
fit = Fit([dataset])
fit.optimize(backend="minuit")
result = fit.minos_contour("y", "z")
assert result["success"] is True
x = result["x"]
assert_allclose(len(x), 10)
assert_allclose(x[0], 299, rtol=1e-5)
assert_allclose(x[-1], 299.133975, rtol=1e-5)
y = result["y"]
assert_allclose(len(y), 10)
assert_allclose(y[0], 0.04, rtol=1e-5)
assert_allclose(y[-1], 0.54, rtol=1e-5)
# Check that original value state wasn't changed
assert_allclose(dataset.models.parameters["y"].value, 300)