1 files changed, 3 insertions, 4 deletions

diff --git a/mailman/testing/layers.py b/mailman/testing/layers.py
index ef4535038..c9b99cab9 100644
--- a/mailman/testing/layers.py
+++ b/mailman/testing/layers.py
@@ -37,7 +37,6 @@ from textwrap import dedent
 from mailman.config import config
 from mailman.core import initialize
 from mailman.core.logging import get_handler
-from mailman.core.styles import style_manager
 from mailman.i18n import _
 from mailman.testing.helpers import SMTPServer
 
@@ -139,7 +138,7 @@ class ConfigLayer:
     def testSetUp(cls):
         # Record the current (default) set of styles so that we can reset them
         # easily in the tear down.
-        cls.styles = set(style_manager.styles)
+        cls.styles = set(config.style_manager.styles)
 
     @classmethod
     def testTearDown(cls):
@@ -154,9 +153,9 @@ class ConfigLayer:
             config.db.message_store.delete_message(message['message-id'])
         config.db.commit()
         # Reset the global style manager.
-        new_styles = set(style_manager.styles) - cls.styles
+        new_styles = set(config.style_manager.styles) - cls.styles
         for style in new_styles:
-            style_manager.unregister(style)
+            config.style_manager.unregister(style)
         cls.styles = None
 
     # Flag to indicate that loggers should propagate to the console.