Fix pytest spec for py3.5

Author: wsanchez

tox.ini

@@ -47,13 +47,13 @@ basepython =
 deps =
     {[default]deps}
 
-    # In Python 2, we need to pull in typing
+    # In Python 2, we need to pull in typing, mock
     py{26,27,py2}: typing==3.7.4.1
     py{26,27,py2}: mock==3.0.5  # rq.filter: <4
 
     # For pytest
-    py{26,27,34,py2}: pytest==4.6.11
-    py{34,35,36,37,38,39,py3}: pytest==5.2.4
+    py{26,27,34,py2}: pytest==4.6.11  # rq.filter: <5
+    py{35,36,37,38,39,py3}: pytest==5.2.4
 
     # For code coverage
     {[testenv:coverage_report]deps}