diff --git a/test/unit/core/filter/tc_command.rb b/test/unit/core/filter/tc_command.rb
index a92ef534b..8ee643c3a 100644
--- a/test/unit/core/filter/tc_command.rb
+++ b/test/unit/core/filter/tc_command.rb
@@ -22,7 +22,7 @@ class TC_Filter < Test::Unit::TestCase
   
   def test_has_valid_param_chars
     assert((not BeEF::Filters::has_valid_param_chars?(nil)), 'Nil')
-    assert((not BeEF::Filters::has_valid_param_chars?("")), 'Empty string')
+    assert((not BeEF::Filters::has_valid_param_chars?("xx")), 'Empty string')
     assert((BeEF::Filters::has_valid_param_chars?("A")), 'Single char')
     assert((not BeEF::Filters::has_valid_param_chars?("+")), 'Single invalid char')
   end