diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index db29e8c5..69dd9ae9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -17,11 +17,7 @@ jobs:
           set -x
           set -e
           python -m pip install pyflakes pytest pytest-doctestplus hypothesis pytest-cov pytest-flakes packaging
-          if [[ ${{ matrix.python-version }} == "3.12-dev" ]]; then
-             python -m pip install --pre --upgrade --extra-index https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy
-          else
-             python -m pip install numpy
-          fi;
+          python -m pip install --pre --upgrade --extra-index https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy
       - name: Run Tests
         run: |
           set -x
diff --git a/ndindex/shapetools.py b/ndindex/shapetools.py
index 7e035d0f..4ea2c94a 100644
--- a/ndindex/shapetools.py
+++ b/ndindex/shapetools.py
@@ -188,13 +188,13 @@ def iter_indices(*shapes, skip_axes=(), _debug=False):
     array([[100],
            [110]])
     >>> for idx1, idx2 in iter_indices((1, 3), (2, 1)):
-    ...     print(f"{idx1 = }; {idx2 = }; {(a[idx1.raw], b[idx2.raw]) = }")
-    idx1 = Tuple(0, 0); idx2 = Tuple(0, 0); (a[idx1.raw], b[idx2.raw]) = (0, 100)
-    idx1 = Tuple(0, 1); idx2 = Tuple(0, 0); (a[idx1.raw], b[idx2.raw]) = (1, 100)
-    idx1 = Tuple(0, 2); idx2 = Tuple(0, 0); (a[idx1.raw], b[idx2.raw]) = (2, 100)
-    idx1 = Tuple(0, 0); idx2 = Tuple(1, 0); (a[idx1.raw], b[idx2.raw]) = (0, 110)
-    idx1 = Tuple(0, 1); idx2 = Tuple(1, 0); (a[idx1.raw], b[idx2.raw]) = (1, 110)
-    idx1 = Tuple(0, 2); idx2 = Tuple(1, 0); (a[idx1.raw], b[idx2.raw]) = (2, 110)
+    ...     print(f"{idx1 = }; {idx2 = }; {(a[idx1.raw], b[idx2.raw]) = }") # doctest: +SKIP38
+    idx1 = Tuple(0, 0); idx2 = Tuple(0, 0); (a[idx1.raw], b[idx2.raw]) = (np.int64(0), np.int64(100))
+    idx1 = Tuple(0, 1); idx2 = Tuple(0, 0); (a[idx1.raw], b[idx2.raw]) = (np.int64(1), np.int64(100))
+    idx1 = Tuple(0, 2); idx2 = Tuple(0, 0); (a[idx1.raw], b[idx2.raw]) = (np.int64(2), np.int64(100))
+    idx1 = Tuple(0, 0); idx2 = Tuple(1, 0); (a[idx1.raw], b[idx2.raw]) = (np.int64(0), np.int64(110))
+    idx1 = Tuple(0, 1); idx2 = Tuple(1, 0); (a[idx1.raw], b[idx2.raw]) = (np.int64(1), np.int64(110))
+    idx1 = Tuple(0, 2); idx2 = Tuple(1, 0); (a[idx1.raw], b[idx2.raw]) = (np.int64(2), np.int64(110))
     >>> a + b
     array([[100, 101, 102],
            [110, 111, 112]])
diff --git a/ndindex/slice.py b/ndindex/slice.py
index bda8e26d..c73aca43 100644
--- a/ndindex/slice.py
+++ b/ndindex/slice.py
@@ -79,7 +79,7 @@ def __hash__(self):
         # Slices are only hashable in Python 3.12+
         try:
             return hash(self.raw)
-        except TypeError:
+        except TypeError: # pragma: no cover
             return hash(self.args)
 
     @property
diff --git a/ndindex/tests/doctest.py b/ndindex/tests/doctest.py
index c110c60e..6c06f0a1 100644
--- a/ndindex/tests/doctest.py
+++ b/ndindex/tests/doctest.py
@@ -22,7 +22,14 @@
 import os
 from contextlib import contextmanager
 from doctest import (DocTestRunner, DocFileSuite, DocTestSuite,
-                     NORMALIZE_WHITESPACE)
+                     NORMALIZE_WHITESPACE, register_optionflag)
+
+SKIP38 = register_optionflag("SKIP38")
+PY38 = sys.version_info[1] == 8
+if PY38:
+    SKIP_THIS_VERSION = SKIP38
+else:
+    SKIP_THIS_VERSION = 0
 
 @contextmanager
 def patch_doctest():
@@ -34,11 +41,17 @@ def patch_doctest():
     orig_run = DocTestRunner.run
 
     def run(self, test, **kwargs):
+        filtered_examples = []
+
         for example in test.examples:
+            if SKIP_THIS_VERSION not in example.options:
+                filtered_examples.append(example)
+
             # Remove ```
             example.want = example.want.replace('```\n', '')
             example.exc_msg = example.exc_msg and example.exc_msg.replace('```\n', '')
 
+        test.examples = filtered_examples
         return orig_run(self, test, **kwargs)
 
     try:
diff --git a/ndindex/tuple.py b/ndindex/tuple.py
index 61052ac3..b9438e5d 100644
--- a/ndindex/tuple.py
+++ b/ndindex/tuple.py
@@ -246,8 +246,8 @@ def reduce(self, shape=None, *, negative_int=False):
         Integer(1)
         >>> a[..., 1]
         array(1)
-        >>> a[1]
-        1
+        >>> a[1] # doctest: +SKIP38
+        np.int64(1)
 
         See https://github.com/Quansight-Labs/ndindex/issues/22.