diff --git a/.github/workflows/bleeding-edge.yaml b/.github/workflows/bleeding-edge.yaml
index d810c08c4a5..73e5443ab0d 100644
--- a/.github/workflows/bleeding-edge.yaml
+++ b/.github/workflows/bleeding-edge.yaml
@@ -40,8 +40,7 @@ jobs:
         # the '-dev' suffix allows to use alphas and betas if no final release is available yet
         # this version should be upgraded as often as possible, typically once a year when numpy
         # and Cython are known to be compatible
-        # for next update (to '3.11-dev', 2022), see https://github.com/numpy/numpy/pull/21308
-        python-version: '3.10-dev'
+        python-version: '3.11-dev'
 
     - name: Install dependencies
       run: |
diff --git a/setup.cfg b/setup.cfg
index 62803de27ba..e5b13531c53 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -43,10 +43,10 @@ install_requires =
     numpy>=1.14.5
     packaging>=20.9
     pyparsing>0.0  # hard dependency to MPL. We require it (unconstrained) in case MPL drops it in the future
-    tomli>=1.2.3
     tomli-w>=0.4.0
     tqdm>=3.4.0
     unyt>=2.8.0
+    tomli>=1.2.3;python_version < '3.11'
 python_requires = >=3.7,<3.12
 include_package_data = True
 scripts = scripts/iyt
@@ -102,9 +102,9 @@ minimal =
     matplotlib==2.2.3
     more-itertools==8.4
     numpy==1.14.5
-    tomli==1.2.3
     tomli-w==0.4.0
     unyt==2.8.0
+    tomli==1.2.3;python_version < '3.11'
 test =
     codecov~=2.0.15
     coverage~=4.5.1
diff --git a/yt/utilities/configure.py b/yt/utilities/configure.py
index 7345afcb9a1..132597ecb28 100644
--- a/yt/utilities/configure.py
+++ b/yt/utilities/configure.py
@@ -1,14 +1,18 @@
 import os
+import sys
 import warnings
 from typing import Callable, List
 
-# TODO: import tomllib from the standard library instead in Python >= 3.11
-import tomli as tomllib
 import tomli_w
 from more_itertools import always_iterable
 
 from yt.utilities.configuration_tree import ConfigLeaf, ConfigNode
 
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 configuration_callbacks: List[Callable[["YTConfig"], None]] = []
 
 
diff --git a/yt/visualization/volume_rendering/tests/test_composite.py b/yt/visualization/volume_rendering/tests/test_composite.py
index e561413ba13..dedd6a3386a 100644
--- a/yt/visualization/volume_rendering/tests/test_composite.py
+++ b/yt/visualization/volume_rendering/tests/test_composite.py
@@ -81,4 +81,3 @@ def test_composite_vr(self):
         im = sc.render()
         im = ImageArray(im.d)
         im.write_png("composite.png")
-        return im
diff --git a/yt/visualization/volume_rendering/tests/test_points.py b/yt/visualization/volume_rendering/tests/test_points.py
index 165e02b671a..25c0d86da9e 100644
--- a/yt/visualization/volume_rendering/tests/test_points.py
+++ b/yt/visualization/volume_rendering/tests/test_points.py
@@ -66,4 +66,3 @@ def test_points_vr(self):
         sc.add_source(points_source)
         im = sc.render()
         im.write_png("points.png")
-        return im
diff --git a/yt/visualization/volume_rendering/tests/test_save_render.py b/yt/visualization/volume_rendering/tests/test_save_render.py
index e2930966c67..16b5ca18fcb 100644
--- a/yt/visualization/volume_rendering/tests/test_save_render.py
+++ b/yt/visualization/volume_rendering/tests/test_save_render.py
@@ -43,5 +43,3 @@ def test_save_render(self):
         # save a different format with/without sigma clips
         sc.save(os.path.join(self.tmpdir, "no_clip.jpg"), render=False)
         sc.save(os.path.join(self.tmpdir, "clip_2.jpg"), sigma_clip=2, render=False)
-
-        return sc
diff --git a/yt/visualization/volume_rendering/tests/test_simple_vr.py b/yt/visualization/volume_rendering/tests/test_simple_vr.py
index 526938e0517..996f459f497 100644
--- a/yt/visualization/volume_rendering/tests/test_simple_vr.py
+++ b/yt/visualization/volume_rendering/tests/test_simple_vr.py
@@ -34,5 +34,4 @@ def tearDown(self):
 
     def test_simple_vr(self):
         ds = fake_random_ds(32)
-        im, sc = yt.volume_render(ds, fname="test.png", sigma_clip=4.0)
-        return im, sc
+        _im, _sc = yt.volume_render(ds, fname="test.png", sigma_clip=4.0)