diff --git a/lib/fog.rb b/lib/fog.rb
index 9729da701..871a0982d 100644
--- a/lib/fog.rb
+++ b/lib/fog.rb
@@ -28,6 +28,10 @@ require 'fog/terremark'
 
 module Fog
 
+  module Mock
+    DELAY = 1
+  end
+
   class MockNotImplemented < StandardError; end
 
   def self.mock!
diff --git a/lib/fog/aws/requests/ec2/describe_instances.rb b/lib/fog/aws/requests/ec2/describe_instances.rb
index e927e3677..204baed61 100644
--- a/lib/fog/aws/requests/ec2/describe_instances.rb
+++ b/lib/fog/aws/requests/ec2/describe_instances.rb
@@ -74,20 +74,20 @@ module Fog
           instance_set.each do |instance|
             case instance['instanceState']['name']
             when 'pending'
-              if Time.now - instance['launchTime'] > 1
+              if Time.now - instance['launchTime'] > Fog::Mock::DELAY
                 instance['instanceState'] = { 'code' => 16, 'name' => 'running' }
               end
             when 'rebooting'
               instance['instanceState'] = { 'code' => 16, 'name' => 'running' }
             when 'shutting-down'
-              if Time.now - @data[:deleted_at][instance['instanceId']] > 2
+              if Time.now - @data[:deleted_at][instance['instanceId']] > Fog::Mock::DELAY * 2
                 @data[:deleted_at].delete(instance['instanceId'])
                 @data[:instances].delete(instance['instanceId'])
-              elsif Time.now - @data[:deleted_at][instance['instanceId']] > 1
+              elsif Time.now - @data[:deleted_at][instance['instanceId']] > Fog::Mock::DELAY
                 instance['instanceState'] = { 'code' => 16, 'name' => 'terminating' }
               end
             when 'terminating'
-              if Time.now - @data[:deleted_at][instance['instanceId']] > 1
+              if Time.now - @data[:deleted_at][instance['instanceId']] > Fog::Mock::DELAY
                 @data[:deleted_at].delete(instance['instanceId'])
                 @data[:instances].delete(instance['instanceId'])
               end
diff --git a/lib/fog/aws/requests/ec2/describe_snapshots.rb b/lib/fog/aws/requests/ec2/describe_snapshots.rb
index 80acf6fec..fd20dec9a 100644
--- a/lib/fog/aws/requests/ec2/describe_snapshots.rb
+++ b/lib/fog/aws/requests/ec2/describe_snapshots.rb
@@ -44,10 +44,10 @@ module Fog
           snapshot_set.each do |snapshot|
             case snapshot['status']
             when 'in progress', 'pending'
-              if Time.now - snapshot['startTime'] > 2
+              if Time.now - snapshot['startTime'] > Fog::Mock::DELAY * 2
                 snapshot['progress']  = '100%'
                 snapshot['status']    = 'completed'
-              elsif Time.now - snapshot['startTime'] > 1
+              elsif Time.now - snapshot['startTime'] > Fog::Mock::DELAY
                 snapshot['progress']  = '50%'
                 snapshot['status']    = 'in progress'
               end
diff --git a/lib/fog/aws/requests/ec2/describe_volumes.rb b/lib/fog/aws/requests/ec2/describe_volumes.rb
index 2176380a2..116b387e0 100644
--- a/lib/fog/aws/requests/ec2/describe_volumes.rb
+++ b/lib/fog/aws/requests/ec2/describe_volumes.rb
@@ -50,16 +50,16 @@ module Fog
           volume_set.each do |volume|
             case volume['status']
             when 'attaching'
-              if Time.now - volume['attachmentSet'].first['attachTime'] > 1
+              if Time.now - volume['attachmentSet'].first['attachTime'] > Fog::Mock::DELAY
                 volume['attachmentSet'].first['status'] = 'attached'
                 volume['status'] = 'attached'
               end
             when 'creating'
-              if Time.now - volume['createTime'] > 1
+              if Time.now - volume['createTime'] > Fog::Mock::DELAY
                 volume['status'] = 'available'
               end
             when 'deleting'
-              if Time.now - @data[:deleted_at][volume['volumeId']] > 1
+              if Time.now - @data[:deleted_at][volume['volumeId']] > Fog::Mock::DELAY
                 @data[:deleted_at].delete(volume['volumeId'])
                 @data[:volumes].delete(volume['volumeId'])
               end