diff --git a/scriptworker/cot/verify.py b/scriptworker/cot/verify.py
index 5f9ad214..62260bc9 100644
--- a/scriptworker/cot/verify.py
+++ b/scriptworker/cot/verify.py
@@ -65,10 +65,10 @@
 log = logging.getLogger(__name__)
 
 
+# XXX Remove all mach command hardcodes when all trees are 59+
 DECISION_MACH_COMMANDS = ((
     './mach', 'taskgraph', 'decision'
 ), )
-# XXX Remove all non- `action-callback` commands when we retire all trees <Fx58
 ACTION_MACH_COMMANDS = ((
     './mach', 'taskgraph', 'add-tasks'
 ), (
@@ -548,14 +548,12 @@ def find_sorted_task_dependencies(task, task_name, task_id):
 
     # bug 1396517 - Decision tasks are standalone; don't point at another task
     # even if the taskGroupId doesn't match.
-    # XXX remove this workaround (now? once Fx59 reaches mozilla-release?)
-    # TODO
+    # XXX remove this workaround when all trees are 59+
     task_type = guess_task_type(task_name, task)
     if task_type in DECISION_TASK_TYPES:
         parent_task_id = task_id
         parent_task_type = 'decision'
     else:
-        # TODO revisit this logic!
         parent_task_id = get_parent_task_id(task) or get_decision_task_id(task)
         parent_task_type = 'parent'
     # make sure we deal with the decision task first, or we may populate
@@ -1190,7 +1188,7 @@ async def verify_parent_task_definition(chain, parent_link):
                     "pushlog_id": pushlog_id,
                     "pushdate": pushlog_info['pushes'][pushlog_id]['date'],
                 }
-            elif tasks_for == 'cron':
+            else:
                 jsone_context['cron'] = load_json_or_yaml(parent_link.task['extra']['cron'])
                 # I don't love these hardcodes.
                 jsone_context["push"] = {
@@ -1204,17 +1202,12 @@ async def verify_parent_task_definition(chain, parent_link):
         log.debug(pprint.pformat(jsone_context))
         rebuilt_definition = jsone.render(tmpl, jsone_context)
         compare_definition = deepcopy(rebuilt_definition["tasks"][0])
-        # XXX ugly
+        # XXX remove this hack when treeherder rolls out json-e 2.5.0
+        # https://whatsdeployed.io/?owner=mozilla&repo=treeherder&name[]=Stage&url[]=https://treeherder.allizom.org/revision.txt&name[]=Prod&url[]=https://treeherder.mozilla.org/revision.txt
         if tasks_for == 'action':
-            # TODO remove these two hacks when json-e is updated with
-            # https://github.com/taskcluster/json-e/pull/221
             compare_definition['payload']['env']['ACTION_INPUT'] = parent_link.task['payload']['env']['ACTION_INPUT']
             compare_definition['payload']['env']['ACTION_PARAMETERS'] = parent_link.task['payload']['env']['ACTION_PARAMETERS']
-        elif tasks_for == 'cron':
-            # TODO remove this hack when json-e is updated with
-            # https://github.com/taskcluster/json-e/pull/221
-            compare_definition['extra']['cron'] = parent_link.task['extra']['cron']
-        # TODO recursively remove-empty-key/value-pairs from copy of
+        # XXX recursively remove-empty-key/value-pairs from copy of
         # parent_link.task before comparison? Or how else to fix?
         if 'tags' not in compare_definition:
             compare_definition['tags'] = {}