diff --git a/src/com/mirantis/mk/Test.groovy b/src/com/mirantis/mk/Test.groovy
index 8c663e5..d9de536 100644
--- a/src/com/mirantis/mk/Test.groovy
+++ b/src/com/mirantis/mk/Test.groovy
@@ -411,7 +411,7 @@
     def salt = new com.mirantis.mk.Salt()
     def dockerPackagesPillar = salt.getPillar(master, target, 'docker:host:pkgs')
     def dockerPackages = salt.getReturnValues(dockerPackagesPillar) ?: ['docker.io']
-    salt.runSaltProcessStep(master, target, 'pkg.install', dockerPackages)
+    salt.runSaltProcessStep(master, target, 'pkg.install', [dockerPackages.join(',')])
 }