diff --git a/parakeet/models/speedyspeech.py b/parakeet/models/speedyspeech.py
index 24197fe3..dea567b6 100644
--- a/parakeet/models/speedyspeech.py
+++ b/parakeet/models/speedyspeech.py
@@ -206,7 +206,9 @@ def inference(self, text, tones=None):
         k = paddle.full([1], 0, dtype=paddle.int64)
         for j in range(t_enc):
             d = durations_to_expand[0, j]
-            M[0, k:k + d, j] = 1
+            # If the d == 0, slice action is meaningless and not supported
+            if d >= 1:
+                M[0, k:k + d, j] = 1
             k += d
 
         encodings = paddle.matmul(M, encodings)
diff --git a/tests/README.md b/tests/README.md
new file mode 100644
index 00000000..60969212
--- /dev/null
+++ b/tests/README.md
@@ -0,0 +1,16 @@
+Please use lite_train_infer.sh, whole_train_infer.sh, infer.sh.
+
+For lite_train_infer
+```
+bash lite_train_infer.sh
+```
+
+For whole_train_infer
+```
+bash whole_train_infer.sh
+```
+
+For infer
+```
+bash infer.sh
+```
diff --git a/tests/infer.sh b/tests/infer.sh
index 754f6330..c1d19de0 100644
--- a/tests/infer.sh
+++ b/tests/infer.sh
@@ -1,2 +1,2 @@
 bash prepare.sh infer
-bash test.sh speedyspeech_params_lite.txt infer
+bash test.sh speedyspeech_params_lite_single_gpu.txt infer
diff --git a/tests/lite_train_infer.sh b/tests/lite_train_infer.sh
index 28a84305..de67efa0 100644
--- a/tests/lite_train_infer.sh
+++ b/tests/lite_train_infer.sh
@@ -1,2 +1,7 @@
+rm exp -rf
+rm e2e -rf
 bash prepare.sh lite_train_infer
-bash test.sh speedyspeech_params_lite.txt lite_train_infer
+bash test.sh speedyspeech_params_lite_single_gpu.txt lite_train_infer
+rm exp -rf
+rm e2e -rf
+bash test.sh speedyspeech_params_lite_multi_gpu.txt lite_train_infer
diff --git a/tests/prepare.sh b/tests/prepare.sh
index 2fa63477..ad389171 100644
--- a/tests/prepare.sh
+++ b/tests/prepare.sh
@@ -36,7 +36,8 @@ if [ ${MODE} = "lite_train_infer" ];then
     wget -nc -P  ./pretrain_models/ https://paddlespeech.bj.bcebos.com/Parakeet/pwg_baker_ckpt_0.4.zip
     (cd ./pretrain_models && unzip speedyspeech_baker_ckpt_0.4.zip && unzip pwg_baker_ckpt_0.4.zip)
     # generate a config patch
-    echo 'max_epoch: 30' > lite_train_infer.yaml
+    echo 'max_epoch: 10' > lite_train_infer.yaml
+    echo 'num_snapshots: 10' >> lite_train_infer.yaml
     # download data
     rm -rf ./train_data/mini_BZNSYP
     wget -nc -P ./train_data/ https://paddlespeech.bj.bcebos.com/datasets/CE/speedyspeech/mini_BZNSYP.tar.gz
diff --git a/tests/speedyspeech_params_lite.txt b/tests/speedyspeech_params_lite_multi_gpu.txt
similarity index 96%
rename from tests/speedyspeech_params_lite.txt
rename to tests/speedyspeech_params_lite_multi_gpu.txt
index c1cfb8f5..c7c66a20 100644
--- a/tests/speedyspeech_params_lite.txt
+++ b/tests/speedyspeech_params_lite_multi_gpu.txt
@@ -1,7 +1,7 @@
 ===========================train_params===========================
 model_name:speedyspeech
 python:python3.7
-gpu_list:1|0,1
+gpu_list:2,3
 null:null
 null:null
 null:null
@@ -21,7 +21,7 @@ null:null
 null:null
 ##
 ===========================eval_params===========================
-eval:../examples/speedyspeech/baker/synthesize_e2e.py --speedyspeech-config=../examples/speedyspeech/baker/conf/default.yaml --speedyspeech-checkpoint=exp/default/checkpoints/snapshot_iter_90.pdz --speedyspeech-stat=pretrain_models/speedyspeech_baker_ckpt_0.4/speedy_speech_stats.npy --pwg-config=../examples/parallelwave_gan/baker/conf/default.yaml --pwg-checkpoint=pretrain_models/pwg_baker_ckpt_0.4/pwg_snapshot_iter_400000.pdz --pwg-stat=pretrain_models/pwg_baker_ckpt_0.4/pwg_stats.npy --text=../examples/speedyspeech/baker/sentences.txt --output-dir=e2e --inference-dir=inference --device="gpu" --phones-dict=../examples/speedyspeech/baker/phones.txt --tones-dict=../examples/speedyspeech/baker/tones.txt
+eval:../examples/speedyspeech/baker/synthesize_e2e.py --speedyspeech-config=../examples/speedyspeech/baker/conf/default.yaml --speedyspeech-checkpoint=exp/default/checkpoints/snapshot_iter_10.pdz --speedyspeech-stat=pretrain_models/speedyspeech_baker_ckpt_0.4/speedy_speech_stats.npy --pwg-config=../examples/parallelwave_gan/baker/conf/default.yaml --pwg-checkpoint=pretrain_models/pwg_baker_ckpt_0.4/pwg_snapshot_iter_400000.pdz --pwg-stat=pretrain_models/pwg_baker_ckpt_0.4/pwg_stats.npy --text=../examples/speedyspeech/baker/sentences.txt --output-dir=e2e --inference-dir=inference --device="gpu" --phones-dict=../examples/speedyspeech/baker/phones.txt --tones-dict=../examples/speedyspeech/baker/tones.txt
 null:null
 ##
 ===========================infer_params===========================
diff --git a/tests/speedyspeech_params_lite_single_gpu.txt b/tests/speedyspeech_params_lite_single_gpu.txt
new file mode 100644
index 00000000..431e624e
--- /dev/null
+++ b/tests/speedyspeech_params_lite_single_gpu.txt
@@ -0,0 +1,51 @@
+===========================train_params===========================
+model_name:speedyspeech
+python:python3.7
+gpu_list:2
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+##
+trainer:norm_train
+norm_train:../examples/speedyspeech/baker/train.py --train-metadata=train_data/mini_BZNSYP/train/norm/metadata.jsonl --dev-metadata=train_data/mini_BZNSYP/dev/norm/metadata.jsonl --config=lite_train_infer.yaml --output-dir=exp/default
+null:null
+null:null
+null:null
+null:null
+null:null
+##
+===========================eval_params===========================
+eval:../examples/speedyspeech/baker/synthesize_e2e.py --speedyspeech-config=../examples/speedyspeech/baker/conf/default.yaml --speedyspeech-checkpoint=exp/default/checkpoints/snapshot_iter_30.pdz --speedyspeech-stat=pretrain_models/speedyspeech_baker_ckpt_0.4/speedy_speech_stats.npy --pwg-config=../examples/parallelwave_gan/baker/conf/default.yaml --pwg-checkpoint=pretrain_models/pwg_baker_ckpt_0.4/pwg_snapshot_iter_400000.pdz --pwg-stat=pretrain_models/pwg_baker_ckpt_0.4/pwg_stats.npy --text=../examples/speedyspeech/baker/sentences.txt --output-dir=e2e --inference-dir=inference --device="gpu" --phones-dict=../examples/speedyspeech/baker/phones.txt --tones-dict=../examples/speedyspeech/baker/tones.txt
+null:null
+##
+===========================infer_params===========================
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+##
+null:null
+null:null
+null:null
+inference:../examples/speedyspeech/baker/inference.py --inference-dir=pretrain_models/speedyspeech_pwg_inference_0.4 --text=../examples/speedyspeech/baker/sentences.txt --output-dir=inference_out --enable-auto-log --phones-dict=../examples/speedyspeech/baker/phones.txt --tones-dict=../examples/speedyspeech/baker/tones.txt --output-dir=e2e --inference-dir=inference
+--use_gpu:True
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
diff --git a/tests/speedyspeech_params_whole.txt b/tests/speedyspeech_params_whole_multi_gpu.txt
similarity index 96%
rename from tests/speedyspeech_params_whole.txt
rename to tests/speedyspeech_params_whole_multi_gpu.txt
index e171cf5b..1cb77a74 100644
--- a/tests/speedyspeech_params_whole.txt
+++ b/tests/speedyspeech_params_whole_multi_gpu.txt
@@ -13,7 +13,7 @@ null:null
 null:null
 ##
 trainer:norm_train
-norm_train:../examples/speedyspeech/baker/train.py --train-metadata=train_data/BZNSYP/train/norm/metadata.jsonl --dev-metadata=train_data/BZNSYP/dev/norm/metadata.jsonl --output-dir=exp/lite
+norm_train:../examples/speedyspeech/baker/train.py --train-metadata=train_data/BZNSYP/train/norm/metadata.jsonl --dev-metadata=train_data/BZNSYP/dev/norm/metadata.jsonl --output-dir=exp/whole
 null:null
 null:null
 null:null
diff --git a/tests/speedyspeech_params_whole_single_gpu.txt b/tests/speedyspeech_params_whole_single_gpu.txt
new file mode 100644
index 00000000..356445b4
--- /dev/null
+++ b/tests/speedyspeech_params_whole_single_gpu.txt
@@ -0,0 +1,51 @@
+===========================train_params===========================
+model_name:speedyspeech
+python:python3.7
+gpu_list:1
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+##
+trainer:norm_train
+norm_train:../examples/speedyspeech/baker/train.py --train-metadata=train_data/BZNSYP/train/norm/metadata.jsonl --dev-metadata=train_data/BZNSYP/dev/norm/metadata.jsonl --output-dir=exp/whole
+null:null
+null:null
+null:null
+null:null
+null:null
+##
+===========================eval_params===========================
+eval:../examples/speedyspeech/baker/synthesize_e2e.py --speedyspeech-config=../examples/speedyspeech/baker/conf/default.yaml --speedyspeech-checkpoint=pretrain_models/speedyspeech_baker_ckpt_0.4/speedyspeech_snapshot_iter_91800.pdz --speedyspeech-stat=pretrain_models/speedyspeech_baker_ckpt_0.4/speedy_speech_stats.npy --pwg-config=../examples/parallelwave_gan/baker/conf/default.yaml --pwg-checkpoint=pretrain_models/pwg_baker_ckpt_0.4/pwg_snapshot_iter_400000.pdz --pwg-stat=pretrain_models/pwg_baker_ckpt_0.4/pwg_stats.npy --text=../examples/speedyspeech/baker/sentences.txt --output-dir=e2e --inference-dir=inference --device="gpu" --phones-dict=../examples/speedyspeech/baker/phones.txt --tones-dict=../examples/speedyspeech/baker/tones.txt
+null:null
+##
+===========================infer_params===========================
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+##
+null:null
+null:null
+null:null
+inference:../examples/speedyspeech/baker/inference.py --inference-dir=pretrain_models/speedyspeech_pwg_inference_0.4 --text=../examples/speedyspeech/baker/sentences.txt --output-dir=inference_out --enable-auto-log --phones-dict=../examples/speedyspeech/baker/phones.txt --tones-dict=../examples/speedyspeech/baker/tones.txt --output-dir=e2e --inference-dir=inference
+--use_gpu:True
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
+null:null
diff --git a/tests/test.sh b/tests/test.sh
index f2808d90..17565d88 100644
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -323,6 +323,7 @@ else
                 elif [ ${#gpu} -le 15 ];then  # train with multi-gpu
                     gsu=${gpu//,/ }
                     nump=`echo $gsu | wc -w`
+                    CUDA_VISIBLE_DEVICES=${gpu}
                     cmd="${python} ${run_train} --nprocs=$nump"
                 else     # train with multi-machine
                     cmd="${python} -m paddle.distributed.launch --ips=${ips} --gpus=${gpu} ${run_train} ${set_save_model} ${set_pretrain} ${set_epoch} ${set_autocast} ${set_batchsize} ${set_train_params1}"
diff --git a/tests/whole_train_infer.sh b/tests/whole_train_infer.sh
index 125264f6..fa2b89df 100644
--- a/tests/whole_train_infer.sh
+++ b/tests/whole_train_infer.sh
@@ -1,2 +1,7 @@
+rm exp -rf
+rm e2e -rf
 bash prepare.sh whole_train_infer
-bash test.sh speedyspeech_params_whole.txt whole_train_infer
+bash test.sh speedyspeech_params_whole_single_gpu.txt whole_train_infer
+rm exp -rf
+rm e2e -rf
+bash test.sh speedyspeech_params_whole_multi_gpu.txt whole_train_infer