Convert test_dummy_threading and test_dbm to unittest.
diff --git a/Misc/NEWS b/Misc/NEWS
index 8826ca4..4fb4a82 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -75,6 +75,8 @@
 Tests
 -----
 
+- GHOP 290: Convert test_dbm and test_dummy_threading to unittest.
+
 - GHOP 293: Convert test_strftime, test_getargs, and test_pep247 to unittest.
 
 - Issue #2055: Convert test_fcntl to unittest.