diff --git a/test/test_array.py b/test/test_array.py
index f6a3b209..15af9e6d 100644
--- a/test/test_array.py
+++ b/test/test_array.py
@@ -28,6 +28,7 @@
 
 from arraycontext import (
     dataclass_array_container,
+    flatten,
     pytest_generate_tests_for_array_contexts,
     with_container_arithmetic,
 )
@@ -142,33 +143,31 @@ def _get_test_containers(actx, ambient_dim=2):
 @pytest.mark.parametrize("ord", [2, np.inf])
 def test_container_norm(actx_factory, ord):
     actx = actx_factory()
-
     c_test = _get_test_containers(actx)
 
-    # {{{ actx.np.linalg.norm
+    # {{{ flat_norm
 
     from pytools.obj_array import make_obj_array
     c = MyContainer(name="hey", mass=1, momentum=make_obj_array([2, 3]), enthalpy=5)
     c_obj_ary = make_obj_array([c, c])
 
-    n1 = actx.np.linalg.norm(c_obj_ary, ord)
+    n1 = flat_norm(c_obj_ary, ord)
     n2 = np.linalg.norm([1, 2, 3, 5]*2, ord)
     assert abs(n1 - n2) < 1e-12
 
-    # }}}
-
-    # {{{ flat_norm
-
-    # check nested vs actx.np.linalg.norm
-    assert actx.to_numpy(abs(
-            flat_norm(c_test[1], ord=ord)
-            - actx.np.linalg.norm(c_test[1], ord=ord))) < 1e-12
-
     # check nested container with only Numbers (and no actx)
     assert abs(flat_norm(c_obj_ary, ord=ord) - n2) < 1.0e-12
     assert abs(
             flat_norm(np.array([1, 1], dtype=object), ord=ord)
             - np.linalg.norm([1, 1], ord=ord)) < 1.0e-12
+
+    # check nested
+    n1 = actx.to_numpy(flat_norm(c_test[1], ord=ord))
+    n2 = np.linalg.norm([
+        np.linalg.norm(actx.to_numpy(flatten(ary, actx)), ord=ord) for ary in c_test[1]
+        ], ord=ord)
+    assert abs(n1 - n2) < 1e-12
+
     # }}}
 
 # }}}