diff --git a/wagtail/admin/signals.py b/wagtail/admin/signals.py
index f1c1bcb28a..746c40abe7 100644
--- a/wagtail/admin/signals.py
+++ b/wagtail/admin/signals.py
@@ -1,4 +1,5 @@
 from django.dispatch import Signal
 
 
-init_new_page = Signal(providing_args=['page', 'parent'])
+# provides args: page, parent
+init_new_page = Signal()
diff --git a/wagtail/core/signals.py b/wagtail/core/signals.py
index 8420f385e9..a2c8e37c2a 100644
--- a/wagtail/core/signals.py
+++ b/wagtail/core/signals.py
@@ -1,17 +1,46 @@
 from django.dispatch import Signal
 
 
-page_published = Signal(providing_args=['instance', 'revision'])
-page_unpublished = Signal(providing_args=['instance'])
-pre_page_move = Signal(providing_args=['instance', 'parent_page_before', 'parent_page_after', 'url_path_before', 'url_path_after'])
-post_page_move = Signal(providing_args=['instance', 'parent_page_before', 'parent_page_after', 'url_path_before', 'url_path_after'])
+# Page signals
 
-workflow_approved = Signal(providing_args=['instance', 'user'])
-workflow_rejected = Signal(providing_args=['instance', 'user'])
-workflow_cancelled = Signal(providing_args=['instance', 'user'])
-workflow_submitted = Signal(providing_args=['instance', 'user'])
+# provides args: instance, revision
+page_published = Signal()
 
-task_approved = Signal(providing_args=['instance', 'user'])
-task_rejected = Signal(providing_args=['instance', 'user'])
-task_submitted = Signal(providing_args=['instance', 'user'])
-task_cancelled = Signal(providing_args=['instance' 'user'])
+# provides args: instance
+page_unpublished = Signal()
+
+# provides args: instance, parent_page_before, parent_page_after, url_path_before, url_path_after
+pre_page_move = Signal()
+
+# provides args: instance, parent_page_before, parent_page_after, url_path_before, url_path_after
+post_page_move = Signal()
+
+
+# Workflow signals
+
+# provides args: instance, user
+workflow_approved = Signal()
+
+# provides args: instance, user
+workflow_rejected = Signal()
+
+# provides args: instance, user
+workflow_cancelled = Signal()
+
+# provides args: instance, user
+workflow_submitted = Signal()
+
+
+# Workflow task signals
+
+# provides args: instance, user
+task_approved = Signal()
+
+# provides args: instance, user
+task_rejected = Signal()
+
+# provides args: instance, user
+task_submitted = Signal()
+
+# provides args: instance, user
+task_cancelled = Signal()
diff --git a/wagtail/documents/models.py b/wagtail/documents/models.py
index 95bd4cfbca..dbbffec21e 100644
--- a/wagtail/documents/models.py
+++ b/wagtail/documents/models.py
@@ -207,7 +207,8 @@ class Document(AbstractDocument):
         ]
 
 
-document_served = Signal(providing_args=['request'])
+# provides args: request
+document_served = Signal()
 
 
 class UploadedDocument(models.Model):