diff --git a/scopes/storage/common.py b/scopes/storage/common.py
index e26e4b1..6b4f5d3 100644
--- a/scopes/storage/common.py
+++ b/scopes/storage/common.py
@@ -53,6 +53,12 @@ class Storage(object):
         self.metadata = MetaData(schema=schema)
         self.containers = {}
 
+    def commit(self):
+        self.db.commit(self.session)
+
+    def mark_changed(self):
+        self.db.mark_changed(self.session)
+
     def create(self, cls):
         container = cls(self)
         self.add(container)
diff --git a/scopes/storage/tracking.py b/scopes/storage/tracking.py
index 8e07aa3..dd805f3 100644
--- a/scopes/storage/tracking.py
+++ b/scopes/storage/tracking.py
@@ -113,7 +113,7 @@ class Container(object):
         values = self.setupValues(track, withTrackId)
         stmt = t.insert().values(**values).returning(t.c.trackid)
         trackId = self.session.execute(stmt).first()[0]
-        self.db.mark_changed(self.session)
+        self.storage.mark_changed()
         return trackId
 
     def update(self, track):
@@ -124,7 +124,7 @@ class Container(object):
         stmt = t.update().values(**values).where(t.c.trackid == track.trackId)
         n = self.session.execute(stmt).rowcount
         if n > 0:
-            self.db.mark_changed(self.session)
+            self.storage.mark_changed()
         return n
 
     def upsert(self, track):
@@ -142,7 +142,7 @@ class Container(object):
         stmt = self.table.delete().where(self.table.c.trackid == trackId)
         n = self.session.execute(stmt).rowcount
         if n > 0:
-            self.db.mark_changed(self.session)
+            self.storage.mark_changed()
         return n
 
     def makeTrack(self, r):
diff --git a/tests/postgres.py b/tests/postgres.py
index f3a6309..a94df90 100644
--- a/tests/postgres.py
+++ b/tests/postgres.py
@@ -9,7 +9,6 @@ config.dbengine = 'postgresql+psycopg'
 config.dbname = 'testdb'
 config.dbuser = 'testuser'
 config.dbpassword = 'secret'
-config.dbschema = 'testing'
 
 # PostgreSQL-specific settings
 from scopes.storage.db.postgres import StorageFactory 
diff --git a/tests/tlib.py b/tests/tlib.py
index 692e070..a774356 100644
--- a/tests/tlib.py
+++ b/tests/tlib.py
@@ -50,7 +50,7 @@ def test_tracking(self, storage):
         self.assertEqual(n, 1)
         self.assertEqual(tracks.get(31), None)
 
-        storage.db.commit(storage.session)
+        storage.commit()
 
 
 def test_folder(self, storage):
@@ -66,5 +66,5 @@ def test_folder(self, storage):
         self.assertEqual(ch1.parent, top.rid)
         self.assertEqual(list(top.keys()), ['child1'])
 
-        storage.db.commit(storage.session)
+        storage.commit()