diff --git a/MANIFEST b/MANIFEST
index 2a0c1b5163..72c1712307 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -750,6 +750,7 @@ test/erb/test_erb.rb
 test/fileutils/fileasserts.rb
 test/fileutils/test_fileutils.rb
 test/fileutils/test_nowrite.rb
+test/gdbm/test_gdbm.rb
 test/logger/test_logger.rb
 test/monitor/test_monitor.rb
 test/optparse/test_noarg.rb