diff --git a/.travis.yml b/.travis.yml
index 76cee30be..dc2287878 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,8 @@ python:
 services:
     - mongodb
     - rabbitmq
+#addons:
+    #postgresql: "9.4"
 install:
     - pip install --allow-all-external -r requirements.txt
     - pip install coveralls httpbin pyproxy>=0.1.6
diff --git a/tests/test_database.py b/tests/test_database.py
index 2198196d0..42c0fdc5c 100644
--- a/tests/test_database.py
+++ b/tests/test_database.py
@@ -480,5 +480,49 @@ def setUpClass(self):
     def tearDownClass(self):
         del self.resultdb
 
+
+#@unittest.skipIf(os.environ.get('IGNORE_POSTGRESQL'), 'no postgresql server for test.')
+#class TestPGTaskDB(TaskDBCase, unittest.TestCase):
+
+    #@classmethod
+    #def setUpClass(self):
+        #self.taskdb = database.connect_database(
+            #'sqlalchemy+postgresql+taskdb://postgres@127.0.0.1:5432/pyspider_test_taskdb'
+        #)
+
+    #@classmethod
+    #def tearDownClass(self):
+        #self.taskdb._execute('DROP DATABASE pyspider_test_taskdb')
+
+
+#@unittest.skipIf(os.environ.get('IGNORE_POSTGRESQL'), 'no postgresql server for test.')
+#class TestPGProjectDB(ProjectDBCase, unittest.TestCase):
+
+
+    #@classmethod
+    #def setUpClass(self):
+        #self.projectdb = database.connect_database(
+            #'sqlalchemy+postgresql+taskdb://postgres@127.0.0.1:5432/pyspider_test_projectdb'
+        #)
+
+    #@classmethod
+    #def tearDownClass(self):
+        #self.projectdb._execute('DROP DATABASE pyspider_test_projectdb')
+
+
+#@unittest.skipIf(os.environ.get('IGNORE_POSTGRESQL'), 'no postgresql server for test.')
+#class TestPGResultDB(ResultDBCase, unittest.TestCase):
+
+    #@classmethod
+    #def setUpClass(self):
+        #self.resultdb = database.connect_database(
+            #'sqlalchemy+postgresql+taskdb://postgres@127.0.0.1:5432/pyspider_test_resultdb'
+        #)
+
+    #@classmethod
+    #def tearDownClass(self):
+        #self.resultdb._execute('DROP DATABASE pyspider_test_resultdb')
+
+
 if __name__ == '__main__':
     unittest.main()