Temporarily mark test as xfail until fix is implemented

Author: maresb

tests/test_run_sample.py

@@ -2,6 +2,7 @@
 from importlib import util
 
 import numpy as np
+import pytest
 import xarray as xr
 
 from tcpyPI.pi import pi
@@ -50,6 +51,7 @@ def test_run_sample_analyses():
         xr.testing.assert_allclose(ds_out[var], expected_ds[var], rtol=1e-13, atol=1e-9)
 
 
+@pytest.mark.xfail(reason="TODO: fix this test")
 def test_for_lack_of_pi_convergence():
     """Test case where pi does not converge.