1 files changed, 26 insertions, 8 deletions
diff --git a/docutils/test/test_transforms/test_class.py b/docutils/test/test_transforms/test_class.py
index a8eef8f27..5f6f24e92 100755
--- a/docutils/test/test_transforms/test_class.py
+++ b/docutils/test/test_transforms/test_class.py
@@ -8,15 +8,33 @@
 Tests for `docutils.transforms.misc.ClassAttribute`.
 """
 
-from test import DocutilsTestSupport
-from docutils.parsers.rst import Parser
+import unittest
 
+from test import DocutilsTestSupport  # NoQA: F401
 
-def suite():
-    parser = Parser()
-    s = DocutilsTestSupport.TransformTestSuite(parser)
-    s.generateTests(totest)
-    return s
+from docutils.frontend import get_default_settings
+from docutils.parsers.rst import Parser
+from docutils.transforms.universal import TestMessages
+from docutils.utils import new_document
+
+
+class TransformTestCase(unittest.TestCase):
+    def test_transforms(self):
+        parser = Parser()
+        settings = get_default_settings(Parser)
+        settings.warning_stream = ''
+        for name, (transforms, cases) in totest.items():
+            for casenum, (case_input, case_expected) in enumerate(cases):
+                with self.subTest(id=f'totest[{name!r}][{casenum}]'):
+                    document = new_document('test data', settings.copy())
+                    parser.parse(case_input, document)
+                    # Don't do a ``populate_from_components()`` because that
+                    # would enable the Transformer's default transforms.
+                    document.transformer.add_transforms(transforms)
+                    document.transformer.add_transform(TestMessages)
+                    document.transformer.apply_transforms()
+                    output = document.pformat()
+                    self.assertEqual(output, case_expected)
 
 
 totest = {}
@@ -187,4 +205,4 @@ A paragraph.
 
 if __name__ == '__main__':
     import unittest
-    unittest.main(defaultTest='suite')
+    unittest.main()