1 files changed, 2 insertions, 2 deletions
diff --git a/lib/set.rb b/lib/set.rb
index 9e3dac06ed..98c566f9c0 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -642,10 +642,10 @@ class TC_Set < Test::Unit::TestCase
       Set.new('a'..'c')
       Set.new('XYZ')
     }
-    assert_raises(ArgumentError) {
+    assert_raises(NoMethodError) {
       Set.new(false)
     }
-    assert_raises(ArgumentError) {
+    assert_raises(NoMethodError) {
       Set.new(1)
     }
     assert_raises(ArgumentError) {