diff --git a/cubed_xarray/tests/test_xarray.py b/cubed_xarray/tests/test_xarray.py
index 6d538f4..d48ab3a 100644
--- a/cubed_xarray/tests/test_xarray.py
+++ b/cubed_xarray/tests/test_xarray.py
@@ -371,7 +371,6 @@ def test_rolling(self):
             actual = v.rolling(x=2).mean()
         self.assertLazyAndAllClose(expected, actual)
 
-    @pytest.mark.xfail(reason="failure in cubed")
     @pytest.mark.parametrize("func", ["first", "last"])
     def test_groupby_first_last(self, func):
         method = operator.methodcaller(func)