diff --git a/examples/csmsc/voc1/local/synthesize.sh b/examples/csmsc/voc1/local/synthesize.sh
index 145557b3d..890d4e0fc 100755
--- a/examples/csmsc/voc1/local/synthesize.sh
+++ b/examples/csmsc/voc1/local/synthesize.sh
@@ -11,4 +11,4 @@ python3 ${BIN_DIR}/../synthesize.py \
     --checkpoint=${train_output_path}/checkpoints/${ckpt_name} \
     --test-metadata=dump/test/norm/metadata.jsonl \
     --output-dir=${train_output_path}/test \
-    --generator-type=pwgan
+    --generator-type=pwgan || exit -1
diff --git a/examples/csmsc/voc1/local/synthesize_e2e.sh b/examples/csmsc/voc1/local/synthesize_e2e.sh
index 7e1a6e8b7..e217622f1 100644
--- a/examples/csmsc/voc1/local/synthesize_e2e.sh
+++ b/examples/csmsc/voc1/local/synthesize_e2e.sh
@@ -19,4 +19,4 @@ python3 ${BIN_DIR}/../../synthesize_e2e.py \
     --text=${BIN_DIR}/../../assets/sentences.txt \
     --output_dir=${train_output_path}/test_e2e \
     --phones_dict=dump/phone_id_map.txt \
-    --inference_dir=${train_output_path}/inference
\ No newline at end of file
+    --inference_dir=${train_output_path}/inference || exit -1