diff --git a/invenio_jobs/services/scheduler.py b/invenio_jobs/services/scheduler.py
index 4932a71..6739591 100644
--- a/invenio_jobs/services/scheduler.py
+++ b/invenio_jobs/services/scheduler.py
@@ -17,15 +17,18 @@
 
 
 class JobEntry(ScheduleEntry):
+    """Entry for celery beat."""
 
     job = None
 
     def __init__(self, job, *args, **kwargs):
+        """Initialise entry."""
         self.job = job
         super().__init__(*args, **kwargs)
 
     @classmethod
     def from_job(cls, job):
+        """Create JobEntry from job."""
         return cls(
             job=job,
             name=job.title,
@@ -38,6 +41,8 @@ def from_job(cls, job):
 
 
 class RunScheduler(Scheduler):
+    """Custom beat scheduler for runs."""
+
     Entry = JobEntry
     entries = {}
 
@@ -47,17 +52,21 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
 
     @property
     def schedule(self):
+        """Get currently scheduled entries."""
         return self.entries
 
     def setup_schedule(self):
+        """Setup schedule."""
         # TODO Check whether we need the celery backend task?
         self.sync()
 
     def reserve(self, entry):
+        """Update entry to next run execution time."""
         new_entry = self.schedule[entry.job.id] = next(entry)
         return new_entry
 
     def apply_entry(self, entry, producer=None):
+        """Create and apply a JobEntry."""
         with self.app.flask_app.app_context():
             logger.info("Scheduler: Sending due task %s (%s)", entry.name, entry.task)
             try:
@@ -80,6 +89,7 @@ def apply_entry(self, entry, producer=None):
                     logger.debug("%s sent.", entry.task)
 
     def sync(self):
+        """Sync Jobs from db to the scheduler."""
         # TODO Should we also have a cleaup task for runs? "stale" run (status running, starttime > hour, Run pending for > 1 hr)
         with self.app.flask_app.app_context():
             jobs = Job.query.filter(Job.active == True).all()
@@ -88,6 +98,7 @@ def sync(self):
                 self.entries[job.id] = JobEntry.from_job(job)
 
     def create_run(self, entry):
+        """Create run from a JobEntry."""
         job = Job.query.filter_by(id=entry.job.id).one()
         run = Run(
             job=job,
diff --git a/invenio_jobs/tasks.py b/invenio_jobs/tasks.py
index 657e311..ec8f3ca 100644
--- a/invenio_jobs/tasks.py
+++ b/invenio_jobs/tasks.py
@@ -16,6 +16,7 @@
 
 # TODO 1. Move to service? 2. Don't use kwargs?
 def update_run(run, **kwargs):
+    """Method to update and commit run updates."""
     if not run:
         return
     for kw, value in kwargs.items():