diff --git a/lib/docker_client.rb b/lib/docker_client.rb
index 9d2f30b6..3639bd6d 100644
--- a/lib/docker_client.rb
+++ b/lib/docker_client.rb
@@ -334,8 +334,8 @@ class DockerClient
     @execution_environment = options[:execution_environment]
     # todo: eventually re-enable this if it is cached. But in the end, we do not need this.
     # docker daemon got much too much load. all not 100% necessary calls to the daemon were removed.
-    #@image = self.class.find_image_by_tag(@execution_environment.docker_image)
-    #fail(Error, "Cannot find image #{@execution_environment.docker_image}!") unless @image
+    @image = self.class.find_image_by_tag(@execution_environment.docker_image)
+    fail(Error, "Cannot find image #{@execution_environment.docker_image}!") unless @image
   end
 
   def self.initialize_environment