diff --git a/ChangeLog b/ChangeLog
index c31af988c3..29351f15f8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Feb 19 17:07:27 2012  Tanaka Akira  <akr@fsij.org>
+
+	* test/dbm/test_dbm.rb (test_dbmfile_suffix): check pag and dir is
+	  empty for 4.3BSD ndbm.
+
 Sun Feb 19 13:08:34 2012  Narihiro Nakamura  <authornari@gmail.com>
 
 	* gc.c (gc_clear_mark_on_sweep_slots): remove a unused variable.
diff --git a/test/dbm/test_dbm.rb b/test/dbm/test_dbm.rb
index bbdd32caa7..6bc63bc75a 100644
--- a/test/dbm/test_dbm.rb
+++ b/test/dbm/test_dbm.rb
@@ -106,6 +106,8 @@ if defined? DBM
       case DBM::VERSION
       when /\bNDBM\b/
         assert_equal(%w[.dir .pag], suffixes)
+        assert(File.zero?(pagname))
+        assert(File.zero?(dirname))
       when /\bGDBM\b/
         assert_equal(%w[.dir .pag], suffixes)
         pag = File.binread(pagname, 16)