diff --git a/moto/ec2/models.py b/moto/ec2/models.py
index 05650904a..309cab6bf 100644
--- a/moto/ec2/models.py
+++ b/moto/ec2/models.py
@@ -1224,7 +1224,7 @@ class VolumeAttachment(object):
 
 
 class Volume(TaggedEC2Resource):
-    def __init__(self, volume_id, size, zone):
+    def __init__(self, ec2_backend, volume_id, size, zone):
         self.id = volume_id
         self.size = size
         self.zone = zone
@@ -1254,7 +1254,7 @@ class Volume(TaggedEC2Resource):
 
 
 class Snapshot(TaggedEC2Resource):
-    def __init__(self, snapshot_id, volume, description):
+    def __init__(self, ec2_backend, snapshot_id, volume, description):
         self.id = snapshot_id
         self.volume = volume
         self.description = description
@@ -1272,7 +1272,7 @@ class EBSBackend(object):
     def create_volume(self, size, zone_name):
         volume_id = random_volume_id()
         zone = self.get_zone_by_name(zone_name)
-        volume = Volume(volume_id, size, zone)
+        volume = Volume(self, volume_id, size, zone)
         self.volumes[volume_id] = volume
         return volume
 
@@ -1314,7 +1314,7 @@ class EBSBackend(object):
     def create_snapshot(self, volume_id, description):
         snapshot_id = random_snapshot_id()
         volume = self.get_volume(volume_id)
-        snapshot = Snapshot(snapshot_id, volume, description)
+        snapshot = Snapshot(self, snapshot_id, volume, description)
         self.snapshots[snapshot_id] = snapshot
         return snapshot