diff --git a/luncho/blueprints/voting.py b/luncho/blueprints/voting.py
index 4b7623c..b4456ae 100644
--- a/luncho/blueprints/voting.py
+++ b/luncho/blueprints/voting.py
@@ -108,7 +108,7 @@ class PlacesVotedMoreThanOnceException(LunchoException):
 
     def _json(self):
         super(PlacesVotedMoreThanOnceException, self)._json()
-        self.json['places'] = self.places
+        self.json['places'] = list(self.places)
 
 
 # ----------------------------------------------------------------------
@@ -178,10 +178,14 @@ def cast_vote(group_id):
 
     # finally, cast the vote
     vote = Vote(request.user, group_id)
+    LOG.debug('User {user} casted vote {vote}'.format(user=request.user,
+                                                      vote=vote))
     db.session.add(vote)
     db.session.commit()     # so vote gets an id
     for (pos, place_id) in enumerate(request.as_json.get('choices')):
         place = CastedVote(vote, pos, place_id)
+        LOG.debug('\tVoted {place} in {pos} position'.format(place=place,
+                                                             pos=pos))
         db.session.add(place)
 
     db.session.commit()
diff --git a/tests/vote_tests.py b/tests/vote_tests.py
index 89a73d8..f24b8ba 100644
--- a/tests/vote_tests.py
+++ b/tests/vote_tests.py
@@ -70,5 +70,133 @@ class TestVote(LunchoTests):
         self.assertJsonError(rv, 406, 'The vote must register 2 places')
         return
 
+    def test_already_voted(self):
+        """Try to vote when the user already voted."""
+        group = self._group()
+        place = self._place()
+        group.places.append(place)
+        self.user.groups.append(group)
+        server.db.session.commit()
+
+        group_id = group.id
+        token = self.user.token
+
+        request = {'choices': [place.id]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=group_id),
+                       request,
+                       token=token)
+        self.assertJsonOk(rv)   # vote in the day
+
+        rv = self.post('/vote/{group_id}/'.format(group_id=group_id),
+                       request,
+                       token=token)
+        self.assertJsonError(rv, 406, 'User already voted today')
+        return
+
+    def test_already_vote_other_group(self):
+        """Try to vote in two different groups in the same day."""
+        group1 = self._group()
+        place1 = self._place()
+        group1.places.append(place1)
+        self.user.groups.append(group1)
+
+        group2 = self._group()
+        place2 = self._place()
+        group2.places.append(place2)
+        self.user.groups.append(group2)
+        server.db.session.commit()
+
+        group1_id = group1.id
+        group2_id = group2.id
+        place1_id = place1.id
+        place2_id = place2.id
+        token = self.user.token
+
+        request = {'choices': [place1_id]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=group1_id),
+                       request,
+                       token=token)
+        self.assertJsonOk(rv)   # first vote for the day
+
+        request = {'choices': [place2_id]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=group2_id),
+                       request,
+                       token=token)
+        self.assertJsonError(rv, 406, 'User already voted today')
+        return
+
+    def test_vote_place_not_in_group(self):
+        """Vote for a place that doesn't belong to the group."""
+        group = self._group()
+        place1 = self._place()
+        place2 = self._place()
+        group.places.append(place2)
+        self.user.groups.append(group)
+        server.db.session.commit()
+
+        request = {'choices': [place1.id]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=group.id),
+                       request,
+                       token=self.user.token)
+        self.assertJsonError(rv, 404, 'Places are not part of this group')
+        return
+
+    def test_vote_for_same_place_twice(self):
+        """Vote for a place more than once."""
+        group = self._group()
+        place = self._place()
+        group.places.append(place)
+        self.user.groups.append(group)
+        server.db.session.commit()
+
+        request = {'choices': [place.id, place.id]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=group.id),
+                       request,
+                       token=self.user.token)
+        self.assertJsonError(rv, 409, 'Places voted more than once')
+        return
+
+    def test_unknown_group(self):
+        """Try to vote in a group that doesn't exist."""
+        request = {'choices': [100]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=100),
+                       request,
+                       token=self.user.token)
+        self.assertJsonError(rv, 404, 'Group not found')
+        return
+
+    def test_vote_in_group_not_member(self):
+        """Try to vote for a group that the user is not a member."""
+        group = self._group()
+        place = self._place()
+        group.places.append(place)
+        server.db.session.commit()
+
+        user2 = self.create_user(name='newUser',
+                                 fullname='new user',
+                                 verified=True,
+                                 create_token=True)
+
+        request = {'choices': [place.id]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=group.id),
+                       request,
+                       token=user2.token)
+        self.assertJsonError(rv, 403, 'User is not member of this group')
+        return
+
+    def test_vote_place_doesnt_exist(self):
+        """Vote for a place that doesnt exist."""
+        group = self._group()
+        place = self._place()
+        group.places.append(place)
+        server.db.session.commit()
+
+        request = {'choices': [place.id + 10]}
+        rv = self.post('/vote/{group_id}/'.format(group_id=group.id),
+                       request,
+                       token=self.user.token)
+        self.assertJsonError(rv, 404, 'Place not found')
+        return
+
 if __name__ == '__main__':
     unittest.main()