ensure ARGV is actually empty

1 files changed, 3 insertions, 1 deletions

diff --git a/test/slop_test.rb b/test/slop_test.rb
index 5648ffc..dde954e 100644
--- a/test/slop_test.rb
+++ b/test/slop_test.rb
@@ -43,7 +43,9 @@ class SlopTest < TestCase
 
   test 'callback when option array is empty' do
     item1 = item2 = nil
-    Slop.new { on_empty { item1 = 'foo' } }.parse
+    temp_argv([]) do
+      Slop.new { on_empty { item1 = 'foo' } }.parse
+    end
 
     assert_equal 'foo', item1
     assert_nil item2