diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 7d5eaf329..f109f2e23 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, windows-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.x', '3.12-dev']
+        python-version: ['3.7', '3.8', '3.9', '3.x']
 
     env:
       PY_COLORS: 1
@@ -45,7 +45,7 @@ jobs:
           sudo apt install ffmpeg  # For replaygain
 
       - name: Test older Python versions with tox
-        if: matrix.python-version != '3.x' && matrix.python-version != '3.12-dev'
+        if: matrix.python-version != '3.x'
         run: |
           tox -e py-test
 
@@ -63,15 +63,6 @@ jobs:
         run: |
           tox -vv -e py-mypy
 
-      - name: Test nightly Python version with tox
-        if: matrix.python-version == '3.12-dev'
-        # continue-on-error is not ideal since it doesn't give a visible
-        # warning, but there doesn't seem to be anything better:
-        # https://github.com/actions/toolkit/issues/399
-        continue-on-error: true
-        run: |
-          tox -e py-test
-
       - name: Upload code coverage
         if: matrix.python-version == '3.x'
         run: |
diff --git a/test/plugins/test_thumbnails.py b/test/plugins/test_thumbnails.py
index c7f5c2175..f9920f673 100644
--- a/test/plugins/test_thumbnails.py
+++ b/test/plugins/test_thumbnails.py
@@ -135,9 +135,6 @@ class ThumbnailsTest(unittest.TestCase, TestHelper):
         plugin.make_cover_thumbnail(album, 12345, thumbnail_dir)
 
         mock_os.path.exists.assert_called_once_with(syspath(md5_file))
-        mock_os.stat.has_calls([call(syspath(md5_file)),
-                                call(syspath(path_to_art))],
-                               any_order=True)
 
         mock_resize.assert_called_once_with(12345, path_to_art, md5_file)
         plugin.add_tags.assert_called_once_with(album, path_to_resized_art)
@@ -230,8 +227,9 @@ class ThumbnailsTest(unittest.TestCase, TestHelper):
         make_cover.reset_mock()
         get_size.return_value = 500, 500
         plugin.process_album(album)
-        make_cover.has_calls([call(album, 128, NORMAL_DIR),
-                              call(album, 256, LARGE_DIR)], any_order=True)
+        make_cover.assert_has_calls([call(album, 128, NORMAL_DIR),
+                                     call(album, 256, LARGE_DIR)],
+                                    any_order=True)
 
     @patch('beetsplug.thumbnails.ThumbnailsPlugin._check_local_ok')
     @patch('beetsplug.thumbnails.decargs')
@@ -246,8 +244,8 @@ class ThumbnailsTest(unittest.TestCase, TestHelper):
         lib.albums.return_value = [album, album2]
         plugin.process_query(lib, Mock(), None)
         lib.albums.assert_called_once_with(mock_decargs.return_value)
-        plugin.process_album.has_calls([call(album), call(album2)],
-                                       any_order=True)
+        plugin.process_album.assert_has_calls([call(album), call(album2)],
+                                              any_order=True)
 
     @patch('beetsplug.thumbnails.BaseDirectory')
     def test_thumbnail_file_name(self, mock_basedir):
diff --git a/test/test_plugins.py b/test/test_plugins.py
index d51c209bc..d09929dd5 100644
--- a/test/test_plugins.py
+++ b/test/test_plugins.py
@@ -321,9 +321,13 @@ class ListenersTest(unittest.TestCase, TestHelper):
                          [d.dummy, d2.dummy])
 
     @patch('beets.plugins.find_plugins')
-    @patch('beets.plugins.inspect')
-    def test_events_called(self, mock_inspect, mock_find_plugins):
-        mock_inspect.getargspec.args.return_value = None
+    @patch('inspect.getfullargspec')
+    def test_events_called(self, mock_gfa, mock_find_plugins):
+        mock_gfa.return_value = Mock(
+            args=(),
+            varargs='args',
+            varkw='kwargs',
+        )
 
         class DummyPlugin(plugins.BeetsPlugin):
             def __init__(self):