diff --git a/xarray/namedarray/_array_api/_elementwise_functions.py b/xarray/namedarray/_array_api/_elementwise_functions.py
index 0d91b13f41d..0fc19a340c8 100644
--- a/xarray/namedarray/_array_api/_elementwise_functions.py
+++ b/xarray/namedarray/_array_api/_elementwise_functions.py
@@ -8,17 +8,11 @@
     _ShapeType,
     _SupportsImag,
     _SupportsReal,
+    _atleast_0d,
 )
 from xarray.namedarray.core import NamedArray
 
 
-def _atleast_0d(x, xp):
-    """
-    Workaround for numpy sometimes returning scalars instead of 0d arrays.
-    """
-    return xp.asarray(x)
-
-
 def abs(x: NamedArray, /) -> NamedArray:
     xp = _get_data_namespace(x)
     _data = _atleast_0d(xp.abs(x._data), xp)
diff --git a/xarray/namedarray/_array_api/_manipulation_functions.py b/xarray/namedarray/_array_api/_manipulation_functions.py
index 5264786ded5..2bf0ef9dc3e 100644
--- a/xarray/namedarray/_array_api/_manipulation_functions.py
+++ b/xarray/namedarray/_array_api/_manipulation_functions.py
@@ -167,7 +167,7 @@ def roll(
 ) -> NamedArray:
     xp = _get_data_namespace(x)
     _data = xp.roll(x._data, shift=shift, axis=axis)
-    return x._new(_data)
+    return x._new(data=_data)
 
 
 def squeeze(x: NamedArray, /, axis: _Axes) -> NamedArray:
diff --git a/xarray/namedarray/_array_api/_utils.py b/xarray/namedarray/_array_api/_utils.py
index 7f462bedb47..fb01a4ec56e 100644
--- a/xarray/namedarray/_array_api/_utils.py
+++ b/xarray/namedarray/_array_api/_utils.py
@@ -174,3 +174,10 @@ def _insert_dim(dims: _Dims, dim: _Dim | Default, axis: _Axis) -> _Dims:
     d = list(dims)
     d.insert(axis, dim)
     return tuple(d)
+
+
+def _atleast_0d(x, xp):
+    """
+    Workaround for numpy sometimes returning scalars instead of 0d arrays.
+    """
+    return xp.asarray(x)