Rakefile in docker-api-1.16.1 vs Rakefile in docker-api-1.17.0

@@ -20,10 +20,10 @@
   desc 'Run the full test suite from scratch'
   task :spec => [:unpack, :record]
 
   desc 'Download the necessary base images'
   task :unpack do
-    %w( registry busybox tianon/true scratch ).each do |image|
+    %w( registry busybox tianon/true scratch debian:wheezy ).each do |image|
       system "docker pull #{image}"
     end
   end
 
   desc 'Run spec tests and record VCR cassettes'