diff --git a/examples/vctk/ernie_sat/local/synthesize_e2e.sh b/examples/vctk/ernie_sat/local/synthesize_e2e.sh
index d6671276f..dcc710447 100755
--- a/examples/vctk/ernie_sat/local/synthesize_e2e.sh
+++ b/examples/vctk/ernie_sat/local/synthesize_e2e.sh
@@ -37,7 +37,7 @@ if [ ${stage} -le 1 ] && [ ${stop_stage} -ge 1 ]; then
         --task_name=edit \
         --wav_path=source/p243_313.wav \
         --old_str='For that reason cover should not be given' \
-        --new_str='For that reason cover is not impossible to be given.' \
+        --new_str='For that reason cover is not impossible to be given' \
         --source_lang=en \
         --target_lang=en \
         --erniesat_config=${config_path} \
diff --git a/paddlespeech/t2s/exps/ernie_sat/synthesize_e2e.py b/paddlespeech/t2s/exps/ernie_sat/synthesize_e2e.py
index 57b479730..e450aa1a0 100644
--- a/paddlespeech/t2s/exps/ernie_sat/synthesize_e2e.py
+++ b/paddlespeech/t2s/exps/ernie_sat/synthesize_e2e.py
@@ -359,7 +359,8 @@ def parse_args():
     parser.add_argument(
         "--task_name",
         type=str,
-        help="task name, should be in {'edit', 'synthesize'}")
+        choices=['edit', 'synthesize'],
+        help="task name.")
     parser.add_argument("--wav_path", type=str, help="path of old wav")
     parser.add_argument("--old_str", type=str, help="old string")
     parser.add_argument("--new_str", type=str, help="new string")