From c718c65849865b270d028cb4361ec2e185eb00e2 Mon Sep 17 00:00:00 2001
From: hp310780 <43389959+hp310780@users.noreply.github.com>
Date: Sun, 31 Oct 2021 16:27:47 +0000
Subject: [PATCH] Add asserts for path variable types

---
 src/_pytest/pathlib.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/_pytest/pathlib.py b/src/_pytest/pathlib.py
index f641e6491..b44753e1a 100644
--- a/src/_pytest/pathlib.py
+++ b/src/_pytest/pathlib.py
@@ -685,6 +685,8 @@ def bestrelpath(directory: Path, dest: Path) -> str:
 
     If no such path can be determined, returns dest.
     """
+    assert isinstance(directory, Path)
+    assert isinstance(dest, Path)
     if dest == directory:
         return os.curdir
     # Find the longest common directory.