diff --git a/CHANGES.rst b/CHANGES.rst
index 5c80d6b8..d9243a4f 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -21,6 +21,9 @@ Bug fixes:
 - fix typos in doc strings
   [tkimnguyen]
 
+- Fix falining AT Collection creation when using api.content.create.
+  [gbastien]
+
 
 1.8.4 (2018-04-24)
 ------------------
diff --git a/src/plone/api/content.py b/src/plone/api/content.py
index a088554d..5ec0605b 100644
--- a/src/plone/api/content.py
+++ b/src/plone/api/content.py
@@ -112,8 +112,8 @@ def create(
         # rename-after-creation and such
         # Passing values as a dict with None values so values set by
         # invokeFactory don't get overridden.
-        # None: None is required so that bool(values) is True.
-        content.processForm(values={None: None})
+        # '': '' is required so that bool(values) is True.
+        content.processForm(values={'': ''})
 
     if not id or (safe_id and id):
         # Create a new id from title
diff --git a/src/plone/api/tests/test_content.py b/src/plone/api/tests/test_content.py
index 18546baa..1033cf6c 100644
--- a/src/plone/api/tests/test_content.py
+++ b/src/plone/api/tests/test_content.py
@@ -376,6 +376,62 @@ def test_create_at_with_title_in_request(self):
 
         self.assertEqual(page.title, 'Test document')
 
+    @unittest.skipIf(HAS_PACONTENTYPES, 'Archetypes only')
+    def test_create_at_collection(self):
+        """Test create at Collecition."""
+        collection = api.content.create(
+            container=self.portal,
+            type='Collection',
+            title='Mandelbrot set',
+            description='Image gallery of a zoom sequence',
+            query=[{
+                'i': 'Type',
+                'o': 'plone.app.querystring.operation.string.is',
+                'v': ['Image'],
+            }],
+        )
+        self.assertEqual(collection.Title(), 'Mandelbrot set')
+
+    @unittest.skipIf(HAS_PACONTENTYPES, 'Archetypes only')
+    def test_create_at_event(self):
+        """https://github.com/plone/plone.api/issues/364"""
+        from DateTime import DateTime
+        today = DateTime()
+        tomorrow = today + 1
+        event = api.content.create(
+            container=self.portal,
+            type='Event',
+            title=u'My event',
+            startDate=today,
+            endDate=tomorrow,
+        )
+        self.assertEqual(event.startDate, today)
+        self.assertEqual(event.endDate, tomorrow)
+        results = api.content.find(Title=u'My event')
+        self.assertEqual(len(results), 1)
+        self.assertEqual(results[0].start, today)
+        self.assertEqual(results[0].end, tomorrow)
+
+    @unittest.skipUnless(HAS_PACONTENTYPES, 'Dexterity only')
+    def test_create_dx_event(self):
+        """https://github.com/plone/plone.app.contenttypes/issues/465"""
+        import datetime
+        today = datetime.datetime.now()
+        tomorrow = today + datetime.timedelta(days=1)
+        event = api.content.create(
+            container=self.portal,
+            type='Event',
+            title=u'My event',
+            start=today,
+            end=tomorrow,
+        )
+        self.assertEqual(event.start, today)
+        self.assertEqual(event.end, tomorrow)
+        results = api.content.find(Title=u'My event')
+        self.assertEqual(len(results), 1)
+        self.assertEqual(results[0].start, today)
+        self.assertEqual(results[0].end, tomorrow)
+
     def test_get_constraints(self):
         """Test the constraints when content is fetched with get."""