[bigdecimal] Fix test for d5ab8e8562

1 files changed, 1 insertions, 1 deletions

diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb
index c8e70acfd0..a2af553333 100644
--- a/test/bigdecimal/test_bigdecimal.rb
+++ b/test/bigdecimal/test_bigdecimal.rb
@@ -231,7 +231,7 @@ class TestBigDecimal < Test::Unit::TestCase
   end
 
   def test_s_allocate
-    assert_raise_with_message(NoMethodError, /undefined method `allocate'/) { BigDecimal.allocate }
+    assert_raise_with_message(TypeError, /allocator undefined for BigDecimal/) { BigDecimal.allocate }
   end
 
   def test_s_new