diff --git a/test/youplot_test.rb b/test/youplot_test.rb
index f6e41fb..d94e3e5 100644
--- a/test/youplot_test.rb
+++ b/test/youplot_test.rb
@@ -3,7 +3,19 @@
 require_relative 'test_helper'
 
 class YouPlotTest < Test::Unit::TestCase
-  def test_that_it_has_a_version_number
+  def teardown
+    YouPlot.run_as_executable = false
+  end
+
+  test :it_has_a_version_number do
     assert_kind_of String, ::YouPlot::VERSION
   end
+
+  test :run_as_executable do
+    assert_equal false, YouPlot.run_as_executable
+    assert_equal false, YouPlot.run_as_executable?
+    YouPlot.run_as_executable = true
+    assert_equal true, YouPlot.run_as_executable
+    assert_equal true, YouPlot.run_as_executable?
+  end
 end