1 files changed, 1 insertions, 1 deletions
diff --git a/test/gdbm/test_gdbm.rb b/test/gdbm/test_gdbm.rb
index 7f7ab6aab9..39f87d7d8a 100644
--- a/test/gdbm/test_gdbm.rb
+++ b/test/gdbm/test_gdbm.rb
@@ -164,7 +164,7 @@ if defined? GDBM
       open_db_child(dbname) do
         assert_raise(Errno::EWOULDBLOCK, Errno::EAGAIN, Errno::EACCES) {
           GDBM.open(dbname, 0644) {|gdbm|
-            assert_instance_of(GDBM, gdbm)
+            assert(false)
           }
         }
       end