diff --git a/nginx.py b/nginx.py
index 19b4798..b183f8f 100755
--- a/nginx.py
+++ b/nginx.py
@@ -382,7 +382,7 @@ def as_strings(self):
         """Return key as nginx config string."""
         if self.value == '' or self.value is None:
             return '{0};\n'.format(self.name)
-        if ';' in self.value or '#' in self.value:
+        if '"' not in self.value and (';' in self.value or '#' in self.value):
             return '{0} "{1}";\n'.format(self.name, self.value)
         return '{0} {1};\n'.format(self.name, self.value)
 
@@ -477,19 +477,13 @@ def loads(data, conf=True):
             index += m.end()
             continue
 
-        key_with_quoted = r'^\s*(\S*?)\s*"([^"]+)";?|\'([^\']+)\';?|\\S+;?'
-        key_wo_quoted = r'^\s*([a-zA-Z0-9-_]+?)\s+(.+?);'
-        m1 = re.compile(key_with_quoted, re.S).search(data[index:])
-        m2 = re.compile(key_wo_quoted, re.S).search(data[index:])
-        if m1 and m2:
-            if m1.start() <= m2.start():
-                m = m1
-            else:
-                m = m2
-        else:
-            m = m1 or m2
+        s1 = r'("[^"]+"|\'[^\']+\'|[^\s;]+)'
+        s2 = r'("[^"]*"|\'[^\']*\'|[^\s;]*)'
+        s3 = r'(\s*[^;]*?)'
+        key = r'^\s*{}\s*{}{};'.format(s1, s2, s3)
+        m = re.compile(key, re.S).search(data[index:])
         if m:
-            k = Key(m.group(1), m.group(2))
+            k = Key(m.group(1), m.group(2) + m.group(3))
             if lopen and isinstance(lopen[0], (Container, Server)):
                 lopen[0].add(k)
             else:
diff --git a/tests.py b/tests.py
index 6b14d85..126c32b 100755
--- a/tests.py
+++ b/tests.py
@@ -45,6 +45,7 @@
     server_name localhost 127.0.0.1;
 root /srv/http;  # And also this one
     mykey "myvalue; #notme myothervalue";
+     "quoted_key" "quoted_value";
     # This one too
     index index.php;
 if (!-e $request_filename)
@@ -101,6 +102,61 @@
 """
 
 
+TESTBLOCK_CASE_5 = """
+upstream test0 {
+    server 1.1.1.1:8080;
+    send "some request";
+}
+
+upstream test1 {
+    server 1.1.1.1:8080;
+    send 'some request';
+}
+
+server {
+    server_name "www.example.com";
+
+    location / {
+        root html;
+    }
+}
+"""
+
+
+TESTBLOCK_CASE_6 = """
+upstream test0 {
+    server 1.1.1.1:8080;
+    check interval=3000 rise=2 fall=3 timeout=3000 type=http;
+    check_http_send "GET /alive.html  HTTP/1.0\r\n\r\n";
+    check_http_expect_alive http_2xx http_3xx;
+}
+
+upstream test1 {
+    ip_hash;
+    server 2.2.2.2:9000;
+    check_http_send 'GET /alive.html  HTTP/1.0\r\n\r\n';
+}
+"""
+
+TESTBLOCK_CASE_7 = """
+upstream xx.com_backend {
+    server 10.193.2.2:9061 weight=1 max_fails=2 fail_timeout=30s;
+    server 10.193.2.1:9061 weight=1 max_fails=2 fail_timeout=30s;
+    session_sticky;
+}
+
+server {
+    listen 80;
+
+    location / {
+        set $xlocation 'test';
+        proxy_pass http://xx.com_backend;
+    }
+}
+"""
+
+
+
 class TestPythonNginx(unittest.TestCase):
     def test_basic_load(self):
         self.assertTrue(nginx.loads(TESTBLOCK_CASE_1) is not None)
@@ -124,21 +180,24 @@ def test_key_parse(self):
         self.assertEqual(firstKey.name, 'listen')
         self.assertEqual(firstKey.value, '80')
         self.assertEqual(thirdKey.name, 'mykey')
-        self.assertEqual(thirdKey.value, 'myvalue; #notme myothervalue')
+        self.assertEqual(thirdKey.value, '"myvalue; #notme myothervalue"')
 
     def test_key_parse_complex(self):
         data = nginx.loads(TESTBLOCK_CASE_2)
-        self.assertEqual(len(data.server.keys), 5)
+        self.assertEqual(len(data.server.keys), 6)
         firstKey = data.server.keys[0]
         thirdKey = data.server.keys[3]
+        fourthKey = data.server.keys[4]
         self.assertEqual(firstKey.name, 'listen')
         self.assertEqual(firstKey.value, '80')
         self.assertEqual(thirdKey.name, 'mykey')
-        self.assertEqual(thirdKey.value, 'myvalue; #notme myothervalue')
+        self.assertEqual(thirdKey.value, '"myvalue; #notme myothervalue"')
         self.assertEqual(
             data.server.locations[-1].keys[0].value,
             "301 $scheme://$host:$server_port${request_uri}bitbucket/"
         )
+        self.assertEqual(fourthKey.name, '"quoted_key"')
+        self.assertEqual(fourthKey.value, '"quoted_value"')
 
     def test_location_parse(self):
         data = nginx.loads(TESTBLOCK_CASE_1)
@@ -162,6 +221,21 @@ def test_reflection(self):
         out_data = '\n' + nginx.dumps(inp_data)
         self.assertEqual(TESTBLOCK_CASE_1, out_data)
 
+    def test_quoted_key_value(self):
+        data = nginx.loads(TESTBLOCK_CASE_5)
+        out_data = '\n' + nginx.dumps(data)
+        self.assertEqual(out_data, TESTBLOCK_CASE_5)
+
+    def test_complex_upstream(self):
+        inp_data = nginx.loads(TESTBLOCK_CASE_6)
+        out_data = '\n' + nginx.dumps(inp_data)
+        self.assertEqual(TESTBLOCK_CASE_6, out_data)
+
+    def test_session_sticky(self):
+        inp_data = nginx.loads(TESTBLOCK_CASE_7)
+        out_data = '\n' + nginx.dumps(inp_data)
+        self.assertEqual(TESTBLOCK_CASE_7, out_data)
+
     def test_filtering(self):
         data = nginx.loads(TESTBLOCK_CASE_1)
         self.assertEqual(len(data.server.filter('Key', 'mykey')), 1)