Enable keyspace events notification when testing.

tests/assets/default.conf

@@ -12,6 +12,9 @@
 #
 # units are case insensitive so 1GB 1Gb 1gB are all the same.
 
+# Enable keyspace events notification for testing so that we cover more code.
+notify-keyspace-events yes
+
 # By default Redis does not run as a daemon. Use 'yes' if you need it.
 # Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
 daemonize no