diff --git a/Gemfile.lock b/Gemfile.lock
index d9d787f..85386eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
     standard-performance (1.3.1)
       lint_roller (~> 1.1)
       rubocop-performance (~> 1.20.2)
-    test-cmd.rb (0.8.0)
+    test-cmd.rb (0.9.3)
     test-unit (3.6.2)
       power_assert
     unicode-display_width (2.5.0)
diff --git a/test/unprivileged/readme_examples_test.rb b/test/unprivileged/readme_examples_test.rb
index d005e2b..1c09aa6 100644
--- a/test/unprivileged/readme_examples_test.rb
+++ b/test/unprivileged/readme_examples_test.rb
@@ -4,17 +4,15 @@ require_relative "../setup"
 
 module BSD::Control
   class ReadmeExamplesTest < BSD::Control::Test
-    require "rbconfig"
     require "test/cmd"
 
     def test_available_features_success
       assert_equal true,
-                   cmd(RbConfig.ruby, readme_example("1_available_features.rb"))
-                     .status.success?
+                   cmd("ruby", readme_example("1_available_features.rb")).success?
     end
 
     def test_available_features_stdout
-      cmd(RbConfig.ruby, readme_example("1_available_features.rb"))
+      cmd("ruby", readme_example("1_available_features.rb"))
         .stdout
         .each_line { assert_match %r{The [a-zA-Z0-9_]+ feature is available}, _1 }
     end