diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1b94aee..b5063f4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,31 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        grappelli: ["0", "1"]
+        python-version: ["3.11"]
+        django-version: ["4.2"]
+        exclude:
+          - python-version: "3.11"
+            grappelli: "1"
+        include:
+          - python-version: "3.8"
+            django-version: "4.2"
+            grappelli: "1"
+          - python-version: "3.9"
+            django-version: "5.0"
+            grappelli: "0"
+          - python-version: "3.10"
+            django-version: "5.0"
+            grappelli: "1"
+          - python-version: "3.12"
+            django-version: "5.1"
+            grappelli: "0"
+
+    name: Django ${{ matrix.django-version }} (Python ${{ matrix.python-version }})${{ matrix.grappelli == '1' && ' + grappelli' || '' }}
+
+    env:
+      DJANGO: ${{ matrix.django-version }}
+      GRAPPELLI: ${{ matrix.grappelli }}
 
     steps:
     - uses: actions/checkout@v3
diff --git a/selenosis/__init__.py b/selenosis/__init__.py
index 4563971..a87492b 100644
--- a/selenosis/__init__.py
+++ b/selenosis/__init__.py
@@ -5,14 +5,10 @@
 #
 # without running afoul of the strict import order required by Django 1.9+.
 # This implementation is shamelessly stolen from werkzeug's ``__init__.py``.
-import pkg_resources
 import sys
 from types import ModuleType
 
-try:
-    __version__ = pkg_resources.get_distribution('django-selenosis').version
-except pkg_resources.DistributionNotFound:
-    __version__ = None
+__version__ = "2.0.5"
 
 # import mapping to objects in other modules
 all_by_module = {
diff --git a/selenosis/runner.py b/selenosis/runner.py
index 969f48e..9b8b840 100644
--- a/selenosis/runner.py
+++ b/selenosis/runner.py
@@ -35,17 +35,13 @@ class NoFailFastUnexpectedSuccessTestResultMixin:
     """Overridden test result class that doesn't failfast on unexpected success"""
 
     def addUnexpectedSuccess(self, test):
-        self.unexpectedSuccesses.append((test, 'Success'))
+        self.unexpectedSuccesses.append(test)
         if self.showAll:
             self.stream.writeln("unexpected success")
         elif self.dots:
             self.stream.write("u")
             self.stream.flush()
 
-    def printErrors(self):
-        super(NoFailFastUnexpectedSuccessTestResultMixin, self).printErrors()
-        self.printErrorList('UNEXPECTED SUCCESS', self.unexpectedSuccesses)
-
 
 class TextTestResult(NoFailFastUnexpectedSuccessTestResultMixin, unittest.TextTestResult):
     pass
@@ -55,10 +51,7 @@ class DebugSQLTextTestResult(
         NoFailFastUnexpectedSuccessTestResultMixin,
         django.test.runner.DebugSQLTextTestResult):
 
-    def addUnexpectedSuccess(self, test):
-        super(DebugSQLTextTestResult, self).addUnexpectedSuccess(test)
-        self.debug_sql_stream.seek(0)
-        self.unexpectedSuccesses[-1] += (self.debug_sql_stream.read(),)
+    pass
 
 
 class _FailedTest(unittest.TestCase):
diff --git a/selenosis/selenium.py b/selenosis/selenium.py
index f06a5f4..2bc3eaa 100644
--- a/selenosis/selenium.py
+++ b/selenosis/selenium.py
@@ -160,12 +160,19 @@ def setUpClass(cls):
         cls.selenium = selenium
         cls.selenium.implicitly_wait(10)
         super(SelenosisTestCase, cls).setUpClass()
+        if hasattr(cls, "addClassCleanup"):
+            cls.addClassCleanup(cls._quit_selenium)
 
     @classmethod
-    def _tearDownClassInternal(cls):
+    def _quit_selenium(cls):
         # quit() the WebDriver before attempting to terminate and join the
         # single-threaded LiveServerThread to avoid a dead lock if the browser
         # kept a connection alive.
-        if hasattr(cls, 'selenium'):
+        if hasattr(cls, "selenium"):
             cls.selenium.quit()
+
+    @classmethod
+    def _tearDownClassInternal(cls):
+        if not hasattr(cls, "addClassCleanup"):
+            cls._quit_selenium()
         super(SelenosisTestCase, cls)._tearDownClassInternal()
diff --git a/selenosis/settings.py b/selenosis/settings.py
index 6b88cae..d737959 100644
--- a/selenosis/settings.py
+++ b/selenosis/settings.py
@@ -14,6 +14,7 @@
     }
 }
 SECRET_KEY = 'z-i*xqqn)r0i7leak^#clq6y5j8&tfslp^a4duaywj2$**s*0_'
+USE_TZ = True
 
 try:
     import grappelli  # noqa
diff --git a/setup.py b/setup.py
index 4841b81..99e82e5 100755
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,23 @@
 #!/usr/bin/env python
 from os import path
+import re
 
 from setuptools import setup, find_packages
 
 
+# Find the package version in __init__.py without importing it
+init_file = path.join(path.dirname(__file__), "selenosis", "__init__.py")
+with open(init_file) as f:
+    for line in f:
+        m = re.search(r"""^__version__ = (['"])(.+?)\1$""", line)
+        if m is not None:
+            version = m.group(2)
+            break
+    else:
+        raise LookupError("Unable to find __version__ in " + init_file)
+
+
+
 def read(*parts):
     file_path = path.join(path.dirname(__file__), *parts)
     return open(file_path).read()
@@ -11,7 +25,7 @@ def read(*parts):
 
 setup(
     name='django-selenosis',
-    version='2.0.5',
+    version=version,
     license='BSD',
     description='Helpers for writing selenium tests for Django',
     long_description=read('README.rst'),
diff --git a/tox.ini b/tox.ini
index cc3ac8f..b6cc9e7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,10 @@
 [tox]
 envlist =
-    py{37,38,39}-dj{22,31,32}{,-grp}
+    py{36,37,38,39}-dj22-{grp,nogrp}
+    py{36,37,38,39,310}-dj32-{grp,nogrp}
+    py{38,39,310,311,312}-dj42-{grp,nogrp}
+    py{310,311,312}-dj50-{grp,nogrp}
+    py{310,311,312}-dj51-nogrp
 
 [testenv]
 commands =
@@ -11,12 +15,14 @@ deps =
     pytest-django
     selenium
     dj22: Django>=2.2,<3.0
-    dj31: Django>=3.1,<3.2
     dj32: Django>=3.2,<4.0
-    dj22-grp: django-grappelli==2.13.4
-    dj31-grp: django-grappelli==2.14.4
-    dj32-grp: django-grappelli==2.15.1
-
+    dj42: Django>=4.2,<4.3
+    dj50: Django>=5.0,<5.1
+    dj51: Django>=5.1a1,<5.2
+    dj22-grp: django-grappelli>=2.13,<2.14
+    dj32-grp: django-grappelli>=2.15,<2.16
+    dj42-grp: django-grappelli>=3.0,<3.1
+    dj50-grp: django-grappelli>=4.0,<4.1
 
 [testenv:clean]
 description = Clean all build and test artifacts
@@ -38,3 +44,17 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
+    3.11: py311
+    3.12: py312
+
+[gh-actions:env]
+DJANGO =
+    2.2: dj22
+    3.2: dj32
+    4.2: dj42
+    5.0: dj50
+    5.1: dj51
+GRAPPELLI =
+    0: nogrp
+    1: grp