From 28761c8da1ec2f16a63fd283e89196f100e7ea03 Mon Sep 17 00:00:00 2001
From: Ran Benita <ran234@gmail.com>
Date: Thu, 18 Jul 2019 00:39:48 +0300
Subject: [PATCH] Have AssertionRewritingHook derive from
 importlib.abc.MetaPathFinder

This is nice for self-documentation, and is the type required by mypy
for adding to sys.meta_path.
---
 src/_pytest/assertion/rewrite.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/_pytest/assertion/rewrite.py b/src/_pytest/assertion/rewrite.py
index 0567e8fb8..0782bfbee 100644
--- a/src/_pytest/assertion/rewrite.py
+++ b/src/_pytest/assertion/rewrite.py
@@ -2,6 +2,7 @@
 import ast
 import errno
 import functools
+import importlib.abc
 import importlib.machinery
 import importlib.util
 import io
@@ -37,7 +38,7 @@ AST_IS = ast.Is()
 AST_NONE = ast.NameConstant(None)
 
 
-class AssertionRewritingHook:
+class AssertionRewritingHook(importlib.abc.MetaPathFinder):
     """PEP302/PEP451 import hook which rewrites asserts."""
 
     def __init__(self, config):