diff --git a/pelican/tests/test_pelican.py b/pelican/tests/test_pelican.py
index 75d644bc..ea28e021 100644
--- a/pelican/tests/test_pelican.py
+++ b/pelican/tests/test_pelican.py
@@ -208,18 +208,17 @@ class TestPelican(LoggedTestCase):
             msg="Writing .*",
             level=logging.INFO)
 
-    def test_md_extensions_list_deprecation(self):
-        """Test that a warning is issued if MD_EXTENSIONS is a list"""
+    def test_md_extensions_deprecation(self):
+        """Test that a warning is issued if MD_EXTENSIONS is used"""
         settings = read_settings(path=None, override={
             'PATH': INPUT_PATH,
             'OUTPUT_PATH': self.temp_path,
             'CACHE_PATH': self.temp_cache,
-            'MD_EXTENSIONS': ['meta'],
+            'MD_EXTENSIONS': {},
         })
         pelican = Pelican(settings=settings)
         mute(True)(pelican.run)()
-        self.assertIsInstance(pelican.settings['MD_EXTENSIONS'], dict)
         self.assertLogCountEqual(
             count=1,
-            msg="The format of the MD_EXTENSIONS setting has changed",
+            msg="MD_EXTENSIONS is deprecated use MARKDOWN instead.",
             level=logging.WARNING)
diff --git a/pelican/tests/test_readers.py b/pelican/tests/test_readers.py
index 43279179..89c3dd61 100644
--- a/pelican/tests/test_readers.py
+++ b/pelican/tests/test_readers.py
@@ -482,10 +482,12 @@ class MdReaderTest(ReaderTest):
         # expected
         page = self.read_file(
             path='article_with_markdown_markup_extensions.md',
-            MD_EXTENSIONS={
-                'markdown.extensions.toc': {},
-                'markdown.extensions.codehilite': {},
-                'markdown.extensions.extra': {}
+            MARKDOWN={
+                'extension_configs': {
+                    'markdown.extensions.toc': {},
+                    'markdown.extensions.codehilite': {},
+                    'markdown.extensions.extra': {}
+                }
             }
         )
         expected = ('<div class="toc">\n'