diff --git a/test/dl/test_c_struct_entry.rb b/test/dl/test_c_struct_entry.rb
index 3df6c368b8..b83cde85e0 100644
--- a/test/dl/test_c_struct_entry.rb
+++ b/test/dl/test_c_struct_entry.rb
@@ -21,11 +21,6 @@ class DL::TestCStructEntity < DL::TestBase
     assert_equal expected, size
   end
 
-  def test_class_size_with_count
-    size = DL::CStructEntity.size([[DL::TYPE_DOUBLE, 2], [DL::TYPE_CHAR, 20]])
-
-    assert_equal DL::TYPE_DOUBLE * 2 + DL::SIZEOF_CHAR * 20, size
-  end
   def test_class_size_with_count
     size = DL::CStructEntity.size([[DL::TYPE_DOUBLE, 2], [DL::TYPE_CHAR, 20]])