In my efforts to fix all Calibre tests, this test would always complain about
backports.functools_lru_cache not existing even after I packaged and added
python2-soupsieve as an input and confirmed it was in the
PYTHONPATH. Currently Calibre does not actually use it for anything other than
testing it's there, so I assume they will start using it in future Calibre
versions.

From 2738dd42caebe55326c76922a12ba8740bdb22e7 Mon Sep 17 00:00:00 2001
From: Brendan Tildesley <mail@brendan.scot>
Date: Sat, 27 Apr 2019 00:42:39 +1000
Subject: [PATCH] Remove test_bs4

---
 src/calibre/test_build.py | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/calibre/test_build.py b/src/calibre/test_build.py
index 73f1172e8c..07bdffd3e5 100644
--- a/src/calibre/test_build.py
+++ b/src/calibre/test_build.py
@@ -73,10 +73,6 @@ class BuildTest(unittest.TestCase):
         from html5_parser import parse
         parse('<p>xxx')
 
-    def test_bs4(self):
-        import soupsieve, bs4
-        del soupsieve, bs4
-
     def test_zeroconf(self):
         if ispy3:
             import zeroconf as z, ifaddr
-- 
2.21.0