diff --git a/swh/lister/bitbucket/tasks.py b/swh/lister/bitbucket/tasks.py
index 5299de1..98be1ac 100644
--- a/swh/lister/bitbucket/tasks.py
+++ b/swh/lister/bitbucket/tasks.py
@@ -1,61 +1,48 @@
 # Copyright (C) 2017-2018 the Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import random
 from celery import group
 
 from swh.scheduler.celery_backend.config import app
 
 from .lister import BitBucketLister
 
 GROUP_SPLIT = 10000
 
 
 def new_lister(api_baseurl='https://api.bitbucket.org/2.0'):
     return BitBucketLister(api_baseurl=api_baseurl)
 
 
-@app.task(name='swh.lister.bitbucket.tasks.IncrementalBitBucketLister',
-          bind=True)
-def incremental_bitbucket_lister(self, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
+@app.task(name=__name__ + '.IncrementalBitBucketLister')
+def incremental_bitbucket_lister(**lister_args):
     lister = new_lister(**lister_args)
     lister.run(min_bound=lister.db_last_index(), max_bound=None)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.bitbucket.tasks.RangeBitBucketLister',
-          bind=True)
-def range_bitbucket_lister(self, start, end, **lister_args):
-    self.log.debug('%s(start=%s, end=%s), lister_args=%s' % (
-        self.name, start, end, lister_args))
+@app.task(name=__name__ + '.RangeBitBucketLister')
+def range_bitbucket_lister(start, end, **lister_args):
     lister = new_lister(**lister_args)
     lister.run(min_bound=start, max_bound=end)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.bitbucket.tasks.FullBitBucketRelister',
-          bind=True)
+@app.task(name=__name__ + '.FullBitBucketRelister', bind=True)
 def full_bitbucket_relister(self, split=None, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
     lister = new_lister(**lister_args)
     ranges = lister.db_partition_indices(split or GROUP_SPLIT)
     random.shuffle(ranges)
     promise = group(range_bitbucket_lister.s(minv, maxv, **lister_args)
                     for minv, maxv in ranges)()
     self.log.debug('%s OK (spawned %s subtasks)' % (self.name, len(ranges)))
     try:
         promise.save()  # so that we can restore the GroupResult in tests
     except NotImplementedError:
         self.log.info('Unable to call save_group with current result backend.')
     return promise.id
 
 
-@app.task(name='swh.lister.bitbucket.tasks.ping',
-          bind=True)
-def ping(self):
-    self.log.debug(self.name)
+@app.task(name=__name__ + '.ping')
+def ping():
     return 'OK'
diff --git a/swh/lister/debian/tasks.py b/swh/lister/debian/tasks.py
index dd016f9..9f5af90 100644
--- a/swh/lister/debian/tasks.py
+++ b/swh/lister/debian/tasks.py
@@ -1,23 +1,17 @@
 # Copyright (C) 2017-2018 the Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from swh.scheduler.celery_backend.config import app
 
 from .lister import DebianLister
 
 
-@app.task(name='swh.lister.debian.tasks.DebianListerTask',
-          bind=True)
-def debian_lister(self, distribution, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
+@app.task(name=__name__ + '.DebianListerTask')
+def debian_lister(distribution, **lister_args):
     DebianLister(**lister_args).run(distribution)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.debian.tasks.ping',
-          bind=True)
-def ping(self):
-    self.log.debug(self.name)
+@app.task(name=__name__ + '.ping')
+def ping():
     return 'OK'
diff --git a/swh/lister/github/tasks.py b/swh/lister/github/tasks.py
index 625f5f5..97dfad5 100644
--- a/swh/lister/github/tasks.py
+++ b/swh/lister/github/tasks.py
@@ -1,62 +1,49 @@
 # Copyright (C) 2017-2018 the Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import random
 
 from celery import group
-
 from swh.scheduler.celery_backend.config import app
 
 from swh.lister.github.lister import GitHubLister
 
 GROUP_SPLIT = 10000
 
 
 def new_lister(api_baseurl='https://api.github.com', **kw):
     return GitHubLister(api_baseurl=api_baseurl, **kw)
 
 
-@app.task(name='swh.lister.github.tasks.IncrementalGitHubLister',
-          bind=True)
-def incremental_github_lister(self, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
+@app.task(name=__name__ + '.IncrementalGitHubLister')
+def incremental_github_lister(**lister_args):
     lister = new_lister(**lister_args)
     lister.run(min_bound=lister.db_last_index(), max_bound=None)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.github.tasks.RangeGitHubLister',
-          bind=True)
-def range_github_lister(self, start, end, **lister_args):
-    self.log.debug('%s(start=%s, end=%d), lister_args=%s' % (
-        self.name, start, end, lister_args))
+@app.task(name=__name__ + '.RangeGitHubLister')
+def range_github_lister(start, end, **lister_args):
     lister = new_lister(**lister_args)
     lister.run(min_bound=start, max_bound=end)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.github.tasks.FullGitHubRelister',
-          bind=True)
+@app.task(name=__name__ + '.FullGitHubRelister', bind=True)
 def full_github_relister(self, split=None, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
     lister = new_lister(**lister_args)
     ranges = lister.db_partition_indices(split or GROUP_SPLIT)
     random.shuffle(ranges)
     promise = group(range_github_lister.s(minv, maxv, **lister_args)
                     for minv, maxv in ranges)()
     self.log.debug('%s OK (spawned %s subtasks)' % (self.name, len(ranges)))
     try:
         promise.save()  # so that we can restore the GroupResult in tests
     except NotImplementedError:
         self.log.info('Unable to call save_group with current result backend.')
+        raise
     return promise.id
 
 
-@app.task(name='swh.lister.github.tasks.ping',
-          bind=True)
-def ping(self):
-    self.log.debug(self.name)
+@app.task(name=__name__ + '.ping')
+def ping():
     return 'OK'
diff --git a/swh/lister/gitlab/tasks.py b/swh/lister/gitlab/tasks.py
index 739d95a..9e57081 100644
--- a/swh/lister/gitlab/tasks.py
+++ b/swh/lister/gitlab/tasks.py
@@ -1,71 +1,57 @@
 # Copyright (C) 2018 the Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import random
 
 from celery import group
-
 from swh.scheduler.celery_backend.config import app
 
 from .. import utils
 from .lister import GitLabLister
 
 
 NBPAGES = 10
 
 
 def new_lister(api_baseurl='https://gitlab.com/api/v4',
                instance=None, sort='asc', per_page=20):
     return GitLabLister(
         api_baseurl=api_baseurl, instance=instance, sort=sort,
         per_page=per_page)
 
 
-@app.task(name='swh.lister.gitlab.tasks.IncrementalGitLabLister',
-          bind=True)
-def incremental_gitlab_lister(self, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
+@app.task(name=__name__ + '.IncrementalGitLabLister')
+def incremental_gitlab_lister(**lister_args):
     lister_args['sort'] = 'desc'
     lister = new_lister(**lister_args)
     total_pages = lister.get_pages_information()[1]
     # stopping as soon as existing origins for that instance are detected
     lister.run(min_bound=1, max_bound=total_pages, check_existence=True)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.gitlab.tasks.RangeGitLabLister',
-          bind=True)
-def range_gitlab_lister(self, start, end, **lister_args):
-    self.log.debug('%s(start=%s, end=%d), lister_args=%s' % (
-        self.name, start, end, lister_args))
+@app.task(name=__name__ + '.RangeGitLabLister')
+def range_gitlab_lister(start, end, **lister_args):
     lister = new_lister(**lister_args)
     lister.run(min_bound=start, max_bound=end)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.gitlab.tasks.FullGitLabRelister',
-          bind=True)
+@app.task(name=__name__ + '.FullGitLabRelister', bind=True)
 def full_gitlab_relister(self, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
     lister = new_lister(**lister_args)
     _, total_pages, _ = lister.get_pages_information()
     ranges = list(utils.split_range(total_pages, NBPAGES))
     random.shuffle(ranges)
     promise = group(range_gitlab_lister.s(minv, maxv, **lister_args)
                     for minv, maxv in ranges)()
     self.log.debug('%s OK (spawned %s subtasks)' % (self.name, len(ranges)))
     try:
         promise.save()
     except NotImplementedError:
         self.log.info('Unable to call save_group with current result backend.')
     return promise.id
 
 
-@app.task(name='swh.lister.gitlab.tasks.ping',
-          bind=True)
-def ping(self):
-    self.log.debug(self.name)
+@app.task(name=__name__ + '.ping')
+def ping():
     return 'OK'
diff --git a/swh/lister/npm/tasks.py b/swh/lister/npm/tasks.py
index af8de0c..dab07fe 100644
--- a/swh/lister/npm/tasks.py
+++ b/swh/lister/npm/tasks.py
@@ -1,70 +1,60 @@
 # Copyright (C) 2018 the Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from datetime import datetime
 from contextlib import contextmanager
 
 from swh.scheduler.celery_backend.config import app
 
 from swh.lister.npm.lister import NpmLister, NpmIncrementalLister
 from swh.lister.npm.models import NpmVisitModel
 
 
 @contextmanager
 def save_registry_state(lister):
     params = {'headers': lister.request_headers()}
     registry_state = lister.session.get(lister.api_baseurl, **params)
     registry_state = registry_state.json()
     keys = ('doc_count', 'doc_del_count', 'update_seq', 'purge_seq',
             'disk_size', 'data_size', 'committed_update_seq',
             'compacted_seq')
 
     state = {key: registry_state[key] for key in keys}
     state['visit_date'] = datetime.now()
     yield
     npm_visit = NpmVisitModel(state)
     lister.db_session.add(npm_visit)
     lister.db_session.commit()
 
 
 def get_last_update_seq(lister):
     """Get latest ``update_seq`` value for listing only updated packages.
     """
     query = lister.db_session.query(NpmVisitModel.update_seq)
     row = query.order_by(NpmVisitModel.uid.desc()).first()
     if not row:
         raise ValueError('No npm registry listing previously performed ! '
                          'This is required prior to the execution of an '
                          'incremental listing.')
     return row[0]
 
 
-@app.task(name='swh.lister.npm.tasks.NpmListerTask',
-          bind=True)
-def npm_lister(self, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
+@app.task(name=__name__ + '.NpmListerTask')
+def npm_lister(**lister_args):
     lister = NpmLister(**lister_args)
     with save_registry_state(lister):
         lister.run()
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.npm.tasks.NpmIncrementalListerTask',
-          bind=True)
-def npm_incremental_lister(self, **lister_args):
-    self.log.debug('%s, lister_args=%s' % (
-        self.name, lister_args))
+@app.task(name=__name__ + '.NpmIncrementalListerTask')
+def npm_incremental_lister(**lister_args):
     lister = NpmIncrementalLister(**lister_args)
     update_seq_start = get_last_update_seq(lister)
     with save_registry_state(lister):
         lister.run(min_bound=update_seq_start)
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.npm.tasks.ping',
-          bind=True)
-def ping(self):
-    self.log.debug(self.name)
+@app.task(name=__name__ + '.ping')
+def ping():
     return 'OK'
diff --git a/swh/lister/pypi/tasks.py b/swh/lister/pypi/tasks.py
index da304de..bf210ab 100644
--- a/swh/lister/pypi/tasks.py
+++ b/swh/lister/pypi/tasks.py
@@ -1,23 +1,17 @@
 # Copyright (C) 2018 the Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from swh.scheduler.celery_backend.config import app
 
 from .lister import PyPILister
 
 
-@app.task(name='swh.lister.pypi.tasks.PyPIListerTask',
-          bind=True)
-def pypi_lister(self, **lister_args):
-    self.log.debug('%s(), lister_args=%s' % (
-        self.name, lister_args))
+@app.task(name=__name__ + '.PyPIListerTask')
+def pypi_lister(**lister_args):
     PyPILister(**lister_args).run()
-    self.log.debug('%s OK' % (self.name))
 
 
-@app.task(name='swh.lister.pypi.tasks.ping',
-          bind=True)
-def ping(self):
-    self.log.debug(self.name)
+@app.task(name=__name__ + '.ping')
+def ping():
     return 'OK'