diff --git a/pyclesperanto_prototype/__init__.py b/pyclesperanto_prototype/__init__.py
index 3422757f..ef2e88c6 100644
--- a/pyclesperanto_prototype/__init__.py
+++ b/pyclesperanto_prototype/__init__.py
@@ -10,5 +10,5 @@
 from ._tier10 import *
 from ._tier11 import *
 
-__version__ = "0.23.3"
+__version__ = "0.23.4"
 __common_alias__ = "cle"
diff --git a/pyclesperanto_prototype/_tier0/_array_operators.py b/pyclesperanto_prototype/_tier0/_array_operators.py
index fde23dba..c45d9135 100644
--- a/pyclesperanto_prototype/_tier0/_array_operators.py
+++ b/pyclesperanto_prototype/_tier0/_array_operators.py
@@ -377,13 +377,13 @@ def __next__(self):
                     self._iter_index = 0
 
                 if self._iter_index < self.image.shape[0]:
-                    if len(self.image.shape) == 2:
+                    if len(self.image.shape) < 3:
                         result = np.asarray(self.image)[self._iter_index]
                     elif len(self.image.shape) == 3:
                         output = create(self.image.shape[1:])
                         result = copy_slice(self.image, output, self._iter_index)
                     else:
-                        raise ValueError("Only 2D or 3D array are supported.")
+                        raise ValueError("Only 1D, 2D or 3D array are supported.")
 
                     self._iter_index = self._iter_index + 1
                     return result
diff --git a/setup.cfg b/setup.cfg
index 08f0d56c..512fdf58 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = pyclesperanto_prototype
-version = 0.23.3
+version = 0.23.4
 author = Robert Haase
 author_email = robert.haase@tu-dresden.de
 url = https://github.com/clEsperanto/pyclesperanto_prototype
diff --git a/tests/test_iterator.py b/tests/test_iterator.py
index 860241ee..6c96e602 100644
--- a/tests/test_iterator.py
+++ b/tests/test_iterator.py
@@ -9,3 +9,48 @@ def test_iterator():
         print(cle.array_equal(i,j))
 
         assert cle.array_equal(i,j)
+
+def test_enumerate():
+    import pyclesperanto_prototype as cle
+
+    cle_array = cle.create((2, 10))
+    cle.set_ramp_x(cle_array)
+
+    sum_ = 0
+    for i, y in enumerate(cle_array[0]):
+        print(i, y)
+        sum_ += y
+
+    assert sum_ == 45
+
+def test_zip():
+    import pyclesperanto_prototype as cle
+
+    cle_array = cle.create((2, 10))
+    cle.set_ramp_x(cle_array)
+
+    sum_ = 0
+    for x, y in zip(cle_array[0], cle_array[1]):
+        print(x, y)
+        sum_ += y
+
+    assert sum_ == 45
+
+def test_iter_centroids():
+    import pyclesperanto_prototype as cle
+
+    labels = cle.asarray([
+        [0, 0, 0, 0, 0],
+        [0, 1, 0, 3, 0],
+        [0, 0, 0, 0, 0],
+        [0, 0, 2, 0, 0],
+        [0, 0, 0, 0, 0],
+    ])
+
+    centroids = cle.centroids_of_labels(labels)
+
+    print(centroids)
+
+    for i, j in zip(centroids[0], centroids[1]):
+        print(i, j)
+