diff --git a/README.rst b/README.rst
index 8302765..d5c8bb3 100644
--- a/README.rst
+++ b/README.rst
@@ -206,7 +206,8 @@ ChangeLog
 
 - v0.19.0
 
-  -suppress close event message(#107) 
+  - suppress close event message(#107)
+  - detect socket connection state(#109)
 
 - v0.18.0
 
diff --git a/tests/test_websocket.py b/tests/test_websocket.py
index 26dd59c..0d0b250 100644
--- a/tests/test_websocket.py
+++ b/tests/test_websocket.py
@@ -29,7 +29,6 @@ from websocket._core import _parse_url, _create_sec_websocket_key
 
 # Skip test to access the internet.
 TEST_WITH_INTERNET = False
-# TEST_WITH_INTERNET = True
 
 # Skip Secure WebSocket test.
 TEST_SECURE_WS = False
@@ -62,6 +61,9 @@ class SockMock(object):
         self.sent.append(data)
         return len(data)
 
+    def close(self):
+        pass
+
 
 class HeaderSockMock(SockMock):
 
@@ -287,6 +289,20 @@ class WebSocketTest(unittest.TestCase):
         with self.assertRaises(ws.WebSocketConnectionClosedException):
             sock.recv()
 
+    def testClose(self):
+        sock = ws.WebSocket()
+        sock.sock = SockMock()
+        sock.connected = True
+        sock.close()
+        self.assertEqual(sock.connected, False)
+
+        sock = ws.WebSocket()
+        s = sock.sock = SockMock()
+        sock.connected = True
+        s.add_packet(six.b('\x88\x80\x17\x98p\x84'))
+        sock.recv()
+        self.assertEqual(sock.connected, False)
+
     def testRecvContFragmentation(self):
         sock = ws.WebSocket()
         s = sock.sock = SockMock()
diff --git a/websocket/_core.py b/websocket/_core.py
index e7c125f..c9d0e39 100644
--- a/websocket/_core.py
+++ b/websocket/_core.py
@@ -787,6 +787,7 @@ class WebSocket(object):
         """
         if status < 0 or status >= ABNF.LENGTH_16:
             raise ValueError("code is invalid range")
+        self.connected = False
         self.send(struct.pack('!H', status) + reason, ABNF.OPCODE_CLOSE)
 
     def close(self, status=STATUS_NORMAL, reason=six.b("")):