fix more tests

src/database/mongo/main.js

@@ -91,7 +91,9 @@ module.exports = function(db, module) {
 		if (!Array.isArray(keys) || !keys.length) {
 			return callback();
 		}
-		db.collection('objects').remove({_key: {$in: keys}}, callback);
+		db.collection('objects').remove({_key: {$in: keys}}, function(err, res) {
+			callback(err);
+		});
 	};
 
 	module.get = function(key, callback) {

tests/database/keys.js

@@ -39,7 +39,7 @@ describe('Key methods', function() {
 
 			db.get('testKey', function(err, value) {
 				assert.equal(err, null, 'db.get error');
-				assert.equal(value, false, 'db.get deleted key is not falsy');
+				assert.equal(false, !!value, 'db.get deleted key is not falsy');
 				done();
 			});
 		});