diff --git a/test/commands/registry_test.rb b/test/commands/registry_test.rb
index 15a2c312..a866ff0c 100755
--- a/test/commands/registry_test.rb
+++ b/test/commands/registry_test.rb
@@ -14,10 +14,14 @@ class CommandsRegistryTest < ActiveSupport::TestCase
   end
 
   test "registry login" do
-    assert_equal [ :docker, :login, "hub.docker.com", "-u", "dhh", "-p", "secret" ], @registry.login
+    assert_equal \
+      "docker login hub.docker.com -u dhh -p secret",
+      @registry.login.join(" ")
   end
 
   test "registry logout" do
-    assert_equal [:docker, :logout, "hub.docker.com"], @registry.logout
+    assert_equal \
+      "docker logout hub.docker.com",
+      @registry.logout.join(" ")
   end
 end