diff --git a/examples/SpdyServer.cc b/examples/SpdyServer.cc
index 4e5557f..40daca1 100644
--- a/examples/SpdyServer.cc
+++ b/examples/SpdyServer.cc
@@ -263,13 +263,15 @@ int SpdyEventHandler::submit_file_response(const std::string& status,
                                            off_t file_length,
                                            spdylay_data_provider *data_prd)
 {
+  std::string date_str = util::http_date(time(0));
+  std::string content_length = util::to_str(file_length);
   const char *nv[] = {
     get_header_field(version_, HD_STATUS).c_str(), status.c_str(),
     get_header_field(version_, HD_VERSION).c_str(), "HTTP/1.1",
     "server", SPDYD_SERVER.c_str(),
-    "content-length", util::to_str(file_length).c_str(),
+    "content-length", content_length.c_str(),
     "cache-control", "max-age=3600",
-    "date", util::http_date(time(0)).c_str(),
+    "date", date_str.c_str(),
     0, 0,
     0
   };
@@ -286,6 +288,7 @@ int SpdyEventHandler::submit_response
  const std::vector<std::pair<std::string, std::string> >& headers,
  spdylay_data_provider *data_prd)
 {
+  std::string date_str = util::http_date(time(0));
   const char **nv = new const char*[8+headers.size()*2+1];
   nv[0] = get_header_field(version_, HD_STATUS).c_str();
   nv[1] = status.c_str();
@@ -294,7 +297,7 @@ int SpdyEventHandler::submit_response
   nv[4] = "server";
   nv[5] = SPDYD_SERVER.c_str();
   nv[6] = "date";
-  nv[7] = util::http_date(time(0)).c_str();
+  nv[7] = date_str.c_str();
   for(int i = 0; i < (int)headers.size(); ++i) {
     nv[8+i*2] = headers[i].first.c_str();
     nv[8+i*2+1] = headers[i].second.c_str();
diff --git a/examples/spdycat.cc b/examples/spdycat.cc
index 500a3dd..ea7e13d 100644
--- a/examples/spdycat.cc
+++ b/examples/spdycat.cc
@@ -161,10 +161,13 @@ int communicate(const std::string& host, uint16_t port,
   }
   make_non_block(fd);
   set_tcp_nodelay(fd);
-  Spdylay sc(fd, ssl,
-             spdylay_npn_get_version(reinterpret_cast<const unsigned char*>
-                                     (next_proto.c_str()), next_proto.size()),
-             callbacks);
+  int spdy_version = spdylay_npn_get_version(
+      reinterpret_cast<const unsigned char*>(next_proto.c_str()),
+      next_proto.size());
+  if (spdy_version <= 0) {
+    return -1;
+  }
+  Spdylay sc(fd, ssl, spdy_version, callbacks);
 
   nfds_t npollfds = 1;
   pollfd pollfds[1];
@@ -243,12 +246,15 @@ int run(char **uris, int n)
   std::vector<Request> reqvec;
   std::string prev_host;
   uint16_t prev_port = 0;
+  int failures = 0;
   for(int i = 0; i < n; ++i) {
     uri::UriStruct us;
     if(uri::parse(us, uris[i])) {
       if(prev_host != us.host || prev_port != us.port) {
         if(!reqvec.empty()) {
-          communicate(prev_host, prev_port, reqvec, &callbacks);
+          if (communicate(prev_host, prev_port, reqvec, &callbacks) != 0) {
+            ++failures;
+          }
           reqvec.clear();
         }
         prev_host = us.host;
@@ -258,9 +264,11 @@ int run(char **uris, int n)
     }
   }
   if(!reqvec.empty()) {
-    communicate(prev_host, prev_port, reqvec, &callbacks);
+    if (communicate(prev_host, prev_port, reqvec, &callbacks) != 0) {
+      ++failures;
+    }
   }
-  return 0;
+  return failures;
 }
 
 void print_usage(std::ostream& out)
@@ -330,8 +338,7 @@ int main(int argc, char **argv)
   SSL_load_error_strings();
   SSL_library_init();
   reset_timer();
-  run(argv+optind, argc-optind);
-  return 0;
+  return run(argv+optind, argc-optind);
 }
 
 } // namespace spdylay
diff --git a/tests/end_to_end.py b/tests/end_to_end.py
index b199679..1fdcd1c 100755
--- a/tests/end_to_end.py
+++ b/tests/end_to_end.py
@@ -76,6 +76,13 @@ class EndToEndSpdy2Tests(EndToEndSpdyTests):
     self.assertEquals(0, self.call('/', ['-v', '-3']))
     self.assertIn('NPN selected the protocol: spdy/3', self.stdout)
 
+  def testFailedRequests(self):
+    self.assertEquals(
+        2, self.call('/', ['https://localhost:25/', 'http://localhost:79']))
+
+  def testOneFailedRequest(self):
+    self.assertEquals(1, subprocess.call([self.client, 'http://localhost:2/']))
+
 
 class EndToEndSpdy3Tests(EndToEndSpdyTests):
   @classmethod