diff --git a/curvlinops/kfac.py b/curvlinops/kfac.py
index a598c5d..42c5bf9 100644
--- a/curvlinops/kfac.py
+++ b/curvlinops/kfac.py
@@ -60,6 +60,7 @@ class MetaEnum(EnumMeta):
     """Metaclass for the Enum class for desired behavior of the `in` operator."""
 
     def __contains__(cls, item):
+        """Check if an item is a valid member of the Enum."""
         try:
             cls(item)
         except ValueError:
diff --git a/test/test_kfac.py b/test/test_kfac.py
index 13d8f63..98426d6 100644
--- a/test/test_kfac.py
+++ b/test/test_kfac.py
@@ -412,7 +412,7 @@ def test_kfac_ef_one_datum(
     )
     kfac_mat = kfac @ eye(kfac.shape[1])
 
-    report_nonclose(ef, kfac_mat)
+    report_nonclose(ef, kfac_mat, atol=1e-7)
 
 
 @mark.parametrize("dev", DEVICES, ids=DEVICES_IDS)