diff --git a/paddle/fluid/inference/tests/book/CMakeLists.txt b/paddle/fluid/inference/tests/book/CMakeLists.txt
index 97d9f03f88ad3..cc179a86256e6 100644
--- a/paddle/fluid/inference/tests/book/CMakeLists.txt
+++ b/paddle/fluid/inference/tests/book/CMakeLists.txt
@@ -24,6 +24,11 @@ function(inference_test TARGET_NAME)
   endforeach()
 endfunction(inference_test)
 
+####################
+# Inference tests here depend on fluid/tests/book. If users want to run
+# individual test with ctest, they need to run tests in fluid/tests/book
+# first to generate saved model.
+####################
 # This unittest is buggy!
 #inference_test(fit_a_line)
 inference_test(image_classification ARGS vgg resnet)