diff --git a/paddle/fluid/inference/tests/book/test_helper.h b/paddle/fluid/inference/tests/book/test_helper.h
index d74017095162f7185ab0b72270c3dd7ba72efa39..a6c93aa0737f79ca1d626862256d3c79a36868ae 100644
--- a/paddle/fluid/inference/tests/book/test_helper.h
+++ b/paddle/fluid/inference/tests/book/test_helper.h
@@ -34,7 +34,7 @@ template <typename T>
 void SetupTensor(paddle::framework::LoDTensor& input,
                  paddle::framework::DDim dims,
                  std::vector<T>& data) {
-  CHECK_EQ(paddle::framework::product(dims), data.size());
+  CHECK_EQ(paddle::framework::product(dims), static_cast<int64_t>(data.size()));
   T* input_ptr = input.mutable_data<T>(dims, paddle::platform::CPUPlace());
   memcpy(input_ptr, data.data(), input.numel() * sizeof(T));
 }
@@ -55,7 +55,7 @@ void SetupLoDTensor(paddle::framework::LoDTensor& input,
                     paddle::framework::LoD lod,
                     std::vector<T>& data) {
   const size_t level = lod.size() - 1;
-  CHECK_EQ(dims[0], (lod[level]).back());
+  CHECK_EQ(dims[0], static_cast<int64_t>((lod[level]).back()));
   input.set_lod(lod);
   SetupTensor<T>(input, dims, data);
 }
@@ -84,7 +84,7 @@ void CheckError(paddle::framework::LoDTensor& output1,
       count++;
     }
   }
-  EXPECT_EQ(count, 0) << "There are " << count << " different elements.";
+  EXPECT_EQ(count, 0U) << "There are " << count << " different elements.";
 }
 
 template <typename Place, bool IsCombined = false>
diff --git a/python/paddle/v2/fluid/tests/notest_csp.py b/python/paddle/v2/fluid/tests/notest_csp.py
new file mode 100644
index 0000000000000000000000000000000000000000..7fe234a20b5222eb85e6bcea2fcb05c53ddd57e9
--- /dev/null
+++ b/python/paddle/v2/fluid/tests/notest_csp.py
@@ -0,0 +1,37 @@
+#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+import paddle.v2.fluid as fluid
+
+
+class TestCSPFramework(unittest.TestCase):
+    def daisy_chain(self):
+        n = 10000
+        leftmost = fluid.make_channel(dtype=int)
+        right = leftmost
+        left = leftmost
+        with fluid.While(steps=n):
+            right = fluid.make_channel(dtype=int)
+            with fluid.go():
+                fluid.send(left, 1 + fluid.recv(right))
+            left = right
+
+        with fluid.go():
+            fluid.send(right, 1)
+        fluid.Print(fluid.recv(leftmost))
+
+
+if __name__ == '__main__':
+    unittest.main()