diff --git a/python/pacemaker/_cts/cmcorosync.py b/python/pacemaker/_cts/cmcorosync.py
index 109045b44c..1177fa514e 100644
--- a/python/pacemaker/_cts/cmcorosync.py
+++ b/python/pacemaker/_cts/cmcorosync.py
@@ -1,61 +1,67 @@
 """ Corosync-specific class for Pacemaker's Cluster Test Suite (CTS)
 """
 
 __all__ = ["Corosync2"]
 __copyright__ = "Copyright 2007-2023 the Pacemaker project contributors"
 __license__ = "GNU General Public License version 2 or later (GPLv2+) WITHOUT ANY WARRANTY"
 
 from pacemaker._cts.CTS import Process
 from pacemaker._cts.clustermanager import ClusterManager
 from pacemaker._cts.patterns import PatternSelector
 
+# Throughout this file, pylint has trouble understanding that EnvFactory
+# is a singleton instance that can be treated as a subscriptable object.
+# Various warnings are disabled because of this.  See also a comment about
+# self._rsh in environment.py.
+# pylint: disable=unsubscriptable-object
+
 class Corosync2(ClusterManager):
     '''
     Corosync version 2 cluster manager class
     '''
     def __init__(self):
         ClusterManager.__init__(self)
 
         self._fullcomplist = {}
         self.templates = PatternSelector(self.name)
 
     @property
     def components(self):
         complist = []
 
         if not self._fullcomplist:
             common_ignore = self.templates.get_component("common-ignore")
 
             for c in [ "pacemaker-based", "pacemaker-controld", "pacemaker-attrd", "pacemaker-execd", "pacemaker-fenced" ]:
                 badnews = self.templates.get_component("%s-ignore" % c) + common_ignore
                 proc = Process(self, c, pats=self.templates.get_component(c),
                                badnews_ignore=badnews)
                 self._fullcomplist[c] = proc
 
             # the scheduler uses dc_pats instead of pats
             badnews = self.templates.get_component("pacemaker-schedulerd-ignore") + common_ignore
             proc = Process(self, "pacemaker-schedulerd",
                            dc_pats=self.templates.get_component("pacemaker-schedulerd"),
                            badnews_ignore=badnews)
             self._fullcomplist["pacemaker-schedulerd"] = proc
 
             # add (or replace) extra components
             badnews = self.templates.get_component("corosync-ignore") + common_ignore
             proc = Process(self, "corosync", pats=self.templates.get_component("corosync"),
                            badnews_ignore=badnews)
             self._fullcomplist["corosync"] = proc
 
         # Processes running under valgrind can't be shot with "killall -9 processname",
         # so don't include them in the returned list
         vgrind = self.env["valgrind-procs"].split()
         for (key, val) in self._fullcomplist.items():
             if self.env["valgrind-tests"] and key in vgrind:
                 self.log("Filtering %s from the component list as it is being profiled by valgrind" % key)
                 continue
 
             if key == "pacemaker-fenced" and not self.env["DoFencing"]:
                 continue
 
             complist.append(val)
 
         return complist