diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 1673cab73..fecf24353 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,7 +1,7 @@
 exclude: doc/en/example/py2py3/test_py2.py
 repos:
 -   repo: https://github.com/ambv/black
-    rev: 18.9b0
+    rev: 18.6b4
     hooks:
     -   id: black
         args: [--safe, --quiet]
diff --git a/src/_pytest/config/__init__.py b/src/_pytest/config/__init__.py
index 7184c6fd9..0f8d2d5f3 100644
--- a/src/_pytest/config/__init__.py
+++ b/src/_pytest/config/__init__.py
@@ -423,7 +423,7 @@ class PytestPluginManager(PluginManager):
                     and not self._using_pyargs
                 ):
                     from _pytest.deprecated import (
-                        PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST,
+                        PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST
                     )
 
                     warnings.warn_explicit(