diff --git a/packages/livedata/livedata_tests.js b/packages/livedata/livedata_tests.js
index b8de74c8ed..51e9ddeee0 100644
--- a/packages/livedata/livedata_tests.js
+++ b/packages/livedata/livedata_tests.js
@@ -4,7 +4,7 @@ test("livedata - basics", function () {
   assert.isTrue(Meteor.is_client);
   assert.isFalse(Meteor.is_server);
 
-  var coll = Meteor.Collection("testing");
+  var coll = new Meteor.Collection("testing");
 
   coll.remove({foo: 'bar'});
   assert.length(coll.find({foo: 'bar'}).fetch(), 0);
diff --git a/packages/livedata/package.js b/packages/livedata/package.js
index 636f3b0590..79cff20cd7 100644
--- a/packages/livedata/package.js
+++ b/packages/livedata/package.js
@@ -21,6 +21,7 @@ Package.on_use(function (api) {
 
 Package.on_test(function (api) {
   api.use('livedata', ['client', 'server']);
+  api.use('mongo-livedata', ['client', 'server']);
   api.use('tinytest');
   api.add_files('livedata_tests.js', 'client');
 });
diff --git a/packages/minimongo/selector.js b/packages/minimongo/selector.js
index ae3ed3747d..65deedc4af 100644
--- a/packages/minimongo/selector.js
+++ b/packages/minimongo/selector.js
@@ -531,7 +531,7 @@ LocalCollection._exprForConstraint = function (type, arg, others,
     // mongo doesn't support $regex inside a $not for some reason. we
     // do, because there's no reason not to that I can see.. but maybe
     // we should follow mongo's behavior?
-    expr = '!' + Collection._exprForOperatorTest(arg, literals);
+    expr = '!' + LocalCollection._exprForOperatorTest(arg, literals);
     search = null;
   } else {
     throw Error("Unrecognized key in selector: " + type);
diff --git a/packages/mongo-livedata/collection.js b/packages/mongo-livedata/collection.js
index bbb4f4c998..556a3453a2 100644
--- a/packages/mongo-livedata/collection.js
+++ b/packages/mongo-livedata/collection.js
@@ -38,6 +38,7 @@ Meteor.Collection = function (name, manager, driver) {
       },
 
       // Apply an update from the server.
+      // XXX better specify this interface (not in terms of a wire message)?
       update: function (msg) {
         var doc = self._collection.findOne(msg.id);