We do not need to run coverage for this project.

--- cachetools-7.0.0/tox.ini.orig
+++ cachetools-7.0.0/tox.ini
@@ -4,11 +4,10 @@
 [testenv]
 deps =
     pytest
-    pytest-cov
 setenv =
     THREADING_TESTS = 1
 commands =
-    py.test --basetemp={envtmpdir} --cov=cachetools --cov-report term-missing {posargs}
+    py.test --basetemp={envtmpdir} {posargs}
 
 [testenv:check-manifest]
 deps =