diff --git a/doc/ui/cmd_argument/detail_introduction.md b/doc/ui/cmd_argument/detail_introduction.md
index af97e04d54135bfd41fc1ac4c81af45486803dff..1f7e406a53ed4b1cf76a3aa7460326ee634d8114 100644
--- a/doc/ui/cmd_argument/detail_introduction.md
+++ b/doc/ui/cmd_argument/detail_introduction.md
@@ -110,7 +110,7 @@
   - type: int32 (default: -1).
 
 * `--test_period_while_training`
-  - Run test every test_period_while_training batches while doing training. If not 0, test log_period batches, if 0, test nothing.
+  - Run test every test_period_while_training batches while doing training. If not 0, test test_batches_while_training batches, if 0, test nothing.
   - type: int32 (default: 0).
 
 * `--test_wait`
diff --git a/paddle/trainer/Trainer.cpp b/paddle/trainer/Trainer.cpp
index 107fa240cf37f24a4ae9147951d2d4469af83b20..507a080cc4fbe58d81523509b54e8a2f7ae3be74 100644
--- a/paddle/trainer/Trainer.cpp
+++ b/paddle/trainer/Trainer.cpp
@@ -45,8 +45,8 @@ P_DEFINE_int32(test_period, 0,
                "This option was deprecated, use test_period_while_training "
                " instead. ");
 P_DEFINE_int32(test_period_while_training, 0,
-               "Run test every so many train batches."
-               " If not 0, test log_period batches."
+               "Run test every test_period_while_training batches."
+               " If not 0, test test_batches_while_training batches."
                " If 0, test nothing.");
 P_DEFINE_int32(test_batches_while_training, 1000,
                "test test_batches_while_training batches if "