diff --git a/tests/fields/fields.py b/tests/fields/fields.py
index 7a0ccc25..dbf148e1 100644
--- a/tests/fields/fields.py
+++ b/tests/fields/fields.py
@@ -334,7 +334,7 @@ class FieldTest(MongoDBTestCase):
     def test_string_validation(self):
         """Ensure that invalid values cannot be assigned to string fields."""
         class Person(Document):
-            name = StringField(max_length=20)
+            name = StringField(max_length=20, min_length=5)
             userid = StringField(r'[0-9a-z_]+$')
 
         person = Person(name=34)
@@ -352,6 +352,10 @@ class FieldTest(MongoDBTestCase):
         person = Person(name='Name that is more than twenty characters')
         self.assertRaises(ValidationError, person.validate)
 
+        # Test max length validation on name
+        person = Person(name='aa')
+        self.assertRaises(ValidationError, person.validate)
+
         person.name = 'Shorter name'
         person.validate()
 
@@ -437,6 +441,10 @@ class FieldTest(MongoDBTestCase):
         doc.age = 'ten'
         self.assertRaises(ValidationError, doc.validate)
 
+        # Test max_value validation
+        doc.value = 200
+        self.assertRaises(ValidationError, doc.validate)
+
     def test_float_validation(self):
         """Ensure that invalid values cannot be assigned to float fields.
         """
diff --git a/tests/queryset/geo.py b/tests/queryset/geo.py
index 38c0377e..acfd9364 100644
--- a/tests/queryset/geo.py
+++ b/tests/queryset/geo.py
@@ -429,6 +429,10 @@ class GeoQueriesTest(MongoDBTestCase):
         roads = Road.objects.filter(line__geo_within=polygon).count()
         self.assertEqual(1, roads)
 
+        sphere = [[-1, 42,], 2]
+        roads = Road.objects.filter(line__geo_within_sphere=sphere).count()
+        self.assertEqual(0, roads)
+
         roads = Road.objects.filter(line__geo_within={"$geometry": polygon}).count()
         self.assertEqual(1, roads)
 
diff --git a/tests/queryset/queryset.py b/tests/queryset/queryset.py
index c78ed985..5fc73a54 100644
--- a/tests/queryset/queryset.py
+++ b/tests/queryset/queryset.py
@@ -1882,6 +1882,12 @@ class QuerySetTest(unittest.TestCase):
         post.reload()
         self.assertTrue('mongo' in post.tags)
 
+        # Push with arrays
+        BlogPost.objects.update(push__tags=['python', 'scala'])
+        post.reload()
+        self.assertTrue('python' in post.tags)
+        self.assertTrue('scala' in post.tags)
+
         BlogPost.objects.update_one(push_all__tags=['db', 'nosql'])
         post.reload()
         self.assertTrue('db' in post.tags and 'nosql' in post.tags)