Convert test_imp over to unittest.
diff --git a/Misc/NEWS b/Misc/NEWS
index 180059b..0001f9f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -139,6 +139,8 @@
 Tests
 -----
 
+- Converted test_imp to use unittest.
+
 - Fix bsddb test_basics.test06_Transactions to check the version
   number properly.