diff --git a/changelog/4327.bugfix.rst b/changelog/4327.bugfix.rst
index 0b498cd09..72223af4e 100644
--- a/changelog/4327.bugfix.rst
+++ b/changelog/4327.bugfix.rst
@@ -1 +1 @@
-Loosen the definition of what ``approx`` considers a sequence
+``approx`` again works with more generic containers, more precisely instances of ``Iterable`` and ``Sized`` instead of more restrictive ``Sequence``.
diff --git a/testing/python/approx.py b/testing/python/approx.py
index 0a91bb08f..26e6a4ab2 100644
--- a/testing/python/approx.py
+++ b/testing/python/approx.py
@@ -497,12 +497,13 @@ class TestApprox(object):
         assert approx(expected, rel=5e-7, abs=0) == actual
         assert approx(expected, rel=5e-8, abs=0) != actual
 
-    def test_generic_iterable_sized_object(self):
-        class newIterable(object):
+    def test_generic_sized_iterable_object(self):
+        class MySizedIterable(object):
             def __iter__(self):
                 return iter([1, 2, 3, 4])
 
             def __len__(self):
                 return 4
 
-        assert [1, 2, 3, 4] == approx(newIterable())
+        expected = MySizedIterable()
+        assert [1, 2, 3, 4] == approx(expected)