+
+# Add a removed database.
+AT_CHECK([ovs-appctl -t ovsdb-server ovsdb-server/add-db db2], [0])
+AT_CHECK([ovs-appctl -t ovsdb-server ovsdb-server/list-dbs],
+ [0], [constraints
+])
+AT_CHECK([ovsdb-client list-tables unix:socket constraints], [0], [ignore], [ignore])