diff --git a/lib/mrsk/cli/app.rb b/lib/mrsk/cli/app.rb
index ed9c19e2..efd0dc38 100644
--- a/lib/mrsk/cli/app.rb
+++ b/lib/mrsk/cli/app.rb
@@ -134,13 +134,7 @@ class Mrsk::Cli::App < Mrsk::Cli::Base
         roles = MRSK.roles_on(host)
 
         roles.each do |role|
-          stale_versions = \
-            capture_with_info(*MRSK.app(role: role).list_versions, raise_on_non_zero_exit: false)
-            .split("\n")
-            .map(&:strip)
-            .drop(1)
-
-          stale_versions.each do |version|
+          stale_versions(role: role).each do |version|
             if stop
               puts_by_host host, "Stopping stale container for role #{role} with version #{version}"
               execute *MRSK.app(role: role).stop(version: version), raise_on_non_zero_exit: false
diff --git a/lib/mrsk/sshkit_with_ext.rb b/lib/mrsk/sshkit_with_ext.rb
index 075c2643..d657a07c 100644
--- a/lib/mrsk/sshkit_with_ext.rb
+++ b/lib/mrsk/sshkit_with_ext.rb
@@ -1,7 +1,17 @@
 require "sshkit"
 require "sshkit/dsl"
 
+module AppHelper
+  def stale_versions(role:)
+    capture_with_info(*MRSK.app(role: role).list_versions, raise_on_non_zero_exit: false)
+      .split("\n")
+      .drop(1)
+  end
+end
+
 class SSHKit::Backend::Abstract
+  include AppHelper
+
   def capture_with_info(*args, **kwargs)
     capture(*args, **kwargs, verbosity: Logger::INFO)
   end