diff --git a/examples/parallelwave_gan/baker/README.md b/examples/parallelwave_gan/baker/README.md
new file mode 100644
index 0000000..577cc4d
--- /dev/null
+++ b/examples/parallelwave_gan/baker/README.md
@@ -0,0 +1,118 @@
+# Parallel WaveGAN with the Baker dataset
+
+This example contains code used to train a [parallel wavegan](http://arxiv.org/abs/1910.11480) model with [Chinese Standard Mandarin Speech Copus](https://www.data-baker.com/open_source.html).
+
+## Preprocess the dataset
+
+Download the dataset from the [official website of data-baker](https://www.data-baker.com/data/index/source) and extract it to `~/datasets`. Then the dataset is in directory `~/datasets/BZNSYP`.
+
+Run the script for preprocessing.
+
+```bash
+bash preprocess.sh
+```
+
+When it is done. A `dump` folder is created in the current directory. The structure of the dump folder is listed below.
+
+```text
+dump
+├── dev
+│   ├── norm
+│   └── raw
+├── test
+│   ├── norm
+│   └── raw
+└── train
+    ├── norm
+    ├── raw
+    └── stats.npy
+```
+
+The dataset is split into 3 parts, namely train, dev and test, each of which contains a `norm` and `raw` subfolder. The `raw` folder contains log magnitude of mel spectrogram of each utterances, while the norm folder contains normalized spectrogram. The statistics used to normalize the spectrogram is computed from the training set, which is located in `dump/train/stats.npy`.
+
+Also there is a `metadata.jsonl` in each subfolder. It is a table-like file which contains id and paths to spectrogam of each utterance.
+
+## Train the model
+
+To train the model use the `run.sh`. It is an example script to run `train.py`.
+
+```bash
+bash run.sh
+```
+
+Or you can use the `train.py` directly. Here's the complete help message to run it.
+
+```text
+usage: train.py [-h] [--config CONFIG] [--train-metadata TRAIN_METADATA]
+                [--dev-metadata DEV_METADATA] [--output-dir OUTPUT_DIR]
+                [--device DEVICE] [--nprocs NPROCS] [--verbose VERBOSE]
+
+Train a Parallel WaveGAN model with Baker Mandrin TTS dataset.
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --config CONFIG       config file to overwrite default config
+  --train-metadata TRAIN_METADATA
+                        training data
+  --dev-metadata DEV_METADATA
+                        dev data
+  --output-dir OUTPUT_DIR
+                        output dir
+  --device DEVICE       device type to use
+  --nprocs NPROCS       number of processes
+  --verbose VERBOSE     verbose
+```
+
+1. `--config` is a config file in yaml format to overwrite the default config, which can be found at `conf/default.yaml`.
+2. `--train-metadata` and `--dev-metadata` should be the metadata file in the normalized subfolder of `train` and `dev` in the `dump` folder.
+3. `--output-dir` is the directory to save the results of the experiment. Checkpoints are save in `checkpoints/` inside this directory.
+4. `--device` is the type of the device to run the experiment, 'cpu' or 'gpu' are supported.
+5. `--nprocs` is the number of processes to run in parallel, note that nprocs > 1 is only supported when `--device` is 'gpu'.
+
+## Pretrained Models
+
+Pretrained models can be downloaded here:
+1. Parallel WaveGAN checkpoint. [pwg_baker_ckpt_0.4.zip](https://paddlespeech.bj.bcebos.com/Parakeet/pwg_baker_ckpt_0.4.zip), which is used as a vocoder in the end-to-end inference script.
+
+Parallel WaveGAN checkpoint contains files listed below.
+
+```text
+pwg_baker_ckpt_0.4
+├── pwg_default.yaml              # default config used to train parallel wavegan
+├── pwg_snapshot_iter_400000.pdz  # generator parameters of parallel wavegan
+└── pwg_stats.npy                 # statistics used to normalize spectrogram when training parallel wavegan
+```
+
+## Synthesize
+
+When training is done or pretrained models are downloaded. You can run `synthesize.py` to synthsize.
+
+```text
+usage: synthesize.py [-h] [--config CONFIG] [--checkpoint CHECKPOINT]
+                     [--test-metadata TEST_METADATA] [--output-dir OUTPUT_DIR]
+                     [--device DEVICE] [--verbose VERBOSE]
+
+synthesize with parallel wavegan.
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --config CONFIG       config file to overwrite default config
+  --checkpoint CHECKPOINT
+                        snapshot to load
+  --test-metadata TEST_METADATA
+                        dev data
+  --output-dir OUTPUT_DIR
+                        output dir
+  --device DEVICE       device to run
+  --verbose VERBOSE     verbose
+```
+
+1. `--config` is the extra configuration file to overwrite the default config. You should use the same config with which the model is trained.
+2. `--checkpoint` is the checkpoint to load. Pick one of the checkpoints from `/checkpoints` inside the training output directory. If you use the pretrained model, use the `pwg_snapshot_iter_400000.pdz`.
+3. `--test-metadata` is the metadata of the test dataset. Use the `metadata.jsonl` in the `dev/norm` subfolder from the processed directory.
+4. `--output-dir` is the directory to save the synthesized audio files.
+5. `--device` is the type of device to run synthesis, 'cpu' and 'gpu' are supported.
+
+## Acknowledgement
+
+We adapted some code from https://github.com/kan-bayashi/ParallelWaveGAN.
diff --git a/examples/speedyspeech/baker/README.md b/examples/speedyspeech/baker/README.md
new file mode 100644
index 0000000..144b38b
--- /dev/null
+++ b/examples/speedyspeech/baker/README.md
@@ -0,0 +1,141 @@
+# Speedyspeech with the Baker dataset
+
+This example contains code used to train a [Speedyspeech](http://arxiv.org/abs/2008.03802) model with [Chinese Standard Mandarin Speech Copus](https://www.data-baker.com/open_source.html). NOTE that we only implement the student part of the Speedyspeech model. The ground truth alignment used to train the model is extracted from the dataset.
+
+## Preprocess the dataset
+
+Download the dataset from the [official website of data-baker](https://www.data-baker.com/data/index/source) and extract it to `~/datasets`. Then the dataset is in directory `~/datasets/BZNSYP`.
+
+Run the script for preprocessing.
+
+```bash
+bash preprocess.sh
+```
+
+When it is done. A `dump` folder is created in the current directory. The structure of the dump folder is listed below.
+
+```text
+dump
+├── dev
+│   ├── norm
+│   └── raw
+├── test
+│   ├── norm
+│   └── raw
+└── train
+    ├── norm
+    ├── raw
+    └── stats.npy
+```
+
+The dataset is split into 3 parts, namely train, dev and test, each of which contains a `norm` and `raw` sub folder. The raw folder contains log magnitude of mel spectrogram of each utterances, while the norm folder contains normalized spectrogram. The statistics used to normalize the spectrogram is computed from the training set, which is located in `dump/train/stats.npy`.
+
+Also there is a `metadata.jsonl` in each subfolder. It is a table-like file which contains phones, tones, durations, path of spectrogram, and id of each utterance.
+
+## Train the model
+
+To train the model use the `run.sh`. It is an example script to run `train.py`.
+
+```bash
+bash run.sh
+```
+
+Or you can use `train.py` directly. Here's the complete help message.
+
+```text
+usage: train.py [-h] [--config CONFIG] [--train-metadata TRAIN_METADATA]
+                [--dev-metadata DEV_METADATA] [--output-dir OUTPUT_DIR]
+                [--device DEVICE] [--nprocs NPROCS] [--verbose VERBOSE]
+
+Train a Speedyspeech model with Baker Mandrin TTS dataset.
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --config CONFIG       config file to overwrite default config
+  --train-metadata TRAIN_METADATA
+                        training data
+  --dev-metadata DEV_METADATA
+                        dev data
+  --output-dir OUTPUT_DIR
+                        output dir
+  --device DEVICE       device type to use
+  --nprocs NPROCS       number of processes
+  --verbose VERBOSE     verbose
+```
+
+1. `--config` is a config file in yaml format to overwrite the default config, which can be found at `conf/default.yaml`.
+2. `--train-metadata` and `--dev-metadata` should be the metadata file in the normalized subfolder of `train` and `dev` in the `dump` folder.
+3. `--output-dir` is the directory to save the results of the experiment. Checkpoints are save in `checkpoints/` inside this directory.
+4. `--device` is the type of the device to run the experiment, 'cpu' or 'gpu' are supported.
+5. `--nprocs` is the number of processes to run in parallel, note that nprocs > 1 is only supported when `--device` is 'gpu'.
+
+## Pretrained Models
+
+Pretrained models can be downloaded here:
+1. Speedyspeech checkpoint. [speedyspeech_baker_ckpt_0.4.zip](https://paddlespeech.bj.bcebos.com/Parakeet/speedyspeech_baker_ckpt_0.4.zip)
+2. Parallel WaveGAN checkpoint. [pwg_baker_ckpt_0.4.zip](https://paddlespeech.bj.bcebos.com/Parakeet/pwg_baker_ckpt_0.4.zip), which is used as a vocoder in the end-to-end inference script.
+
+Speedyspeech checkpoint contains files listed below.
+
+```text
+speedyspeech_baker_ckpt_0.4
+├── speedyspeech_default.yaml             # default config used to train speedyseech
+├── speedy_speech_stats.npy               # statistics used to normalize spectrogram when training speedyspeech
+└── speedyspeech_snapshot_iter_91800.pdz  # model parameters and optimizer states
+```
+
+Parallel WaveGAN checkpoint contains files listed below.
+
+```text
+pwg_baker_ckpt_0.4
+├── pwg_default.yaml              # default config used to train parallel wavegan
+├── pwg_snapshot_iter_400000.pdz  # model parameters and optimizer states of parallel wavegan
+└── pwg_stats.npy                 # statistics used to normalize spectrogram when training parallel wavegan
+```
+
+## Synthesize End to End
+
+When training is done or pretrained models are downloaded. You can run `synthesize_e2e.py` to synthsize.
+
+```text
+usage: synthesize_e2e.py [-h] [--speedyspeech-config SPEEDYSPEECH_CONFIG]
+                         [--speedyspeech-checkpoint SPEEDYSPEECH_CHECKPOINT]
+                         [--speedyspeech-stat SPEEDYSPEECH_STAT]
+                         [--pwg-config PWG_CONFIG] [--pwg-params PWG_PARAMS]
+                         [--pwg-stat PWG_STAT] [--text TEXT]
+                         [--output-dir OUTPUT_DIR]
+                         [--inference-dir INFERENCE_DIR] [--device DEVICE]
+                         [--verbose VERBOSE]
+
+Synthesize with speedyspeech & parallel wavegan.
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --speedyspeech-config SPEEDYSPEECH_CONFIG
+                        config file for speedyspeech.
+  --speedyspeech-checkpoint SPEEDYSPEECH_CHECKPOINT
+                        speedyspeech checkpoint to load.
+  --speedyspeech-stat SPEEDYSPEECH_STAT
+                        mean and standard deviation used to normalize
+                        spectrogram when training speedyspeech.
+  --pwg-config PWG_CONFIG
+                        config file for parallelwavegan.
+  --pwg-checkpoint PWG_PARAMS
+                        parallel wavegan checkpoint to load.
+  --pwg-stat PWG_STAT   mean and standard deviation used to normalize
+                        spectrogram when training speedyspeech.
+  --text TEXT           text to synthesize, a 'utt_id sentence' pair per line
+  --output-dir OUTPUT_DIR
+                        output dir
+  --inference-dir INFERENCE_DIR
+                        dir to save inference models
+  --device DEVICE       device type to use
+  --verbose VERBOSE     verbose
+```
+
+1. `--speedyspeech-config`, `--speedyspeech-checkpoint`, `--speedyspeech-stat` are arguments for speedyspeech, which correspond to the 3 files in the speedyspeech pretrained model.
+2. `--pwg-config`, `--pwg-checkpoint`, `--pwg-stat` are arguments for speedyspeech, which correspond to the 3 files in the parallel wavegan pretrained model.
+3. `--text` is the text file, which contains sentences to synthesize.
+4. `--output-dir` is the directory to save synthesized audio files.
+5. `--inference-dir` is the directory to save exported model, which can be used with paddle infernece.
+6. `--device` is the type of device to run synthesis, 'cpu' and 'gpu' are supported. 'gpu' is recommended for faster synthesis.
diff --git a/examples/speedyspeech/baker/compute_statistics.py b/examples/speedyspeech/baker/compute_statistics.py
index e145974..3d3dd5b 100644
--- a/examples/speedyspeech/baker/compute_statistics.py
+++ b/examples/speedyspeech/baker/compute_statistics.py
@@ -89,6 +89,11 @@ def main():
 
     with jsonlines.open(args.metadata, 'r') as reader:
         metadata = list(reader)
+
+    metadata_dir = Path(args.metadata).parent
+    for item in metadata:
+        item["feats"] = str(metadata_dir / item["feats"])
+
     dataset = DataTable(
         metadata,
         fields=[args.field_name],
diff --git a/examples/speedyspeech/baker/config.py b/examples/speedyspeech/baker/config.py
index f555791..3ca3121 100644
--- a/examples/speedyspeech/baker/config.py
+++ b/examples/speedyspeech/baker/config.py
@@ -14,6 +14,9 @@
 
 import yaml
 from yacs.config import CfgNode as Configuration
+from pathlib import Path
+
+config_path = (Path(__file__).parent / "conf" / "default.yaml").resolve()
 
 with open("conf/default.yaml", 'rt') as f:
     _C = yaml.safe_load(f)
diff --git a/examples/speedyspeech/baker/frontend.py b/examples/speedyspeech/baker/frontend.py
index 5914436..e8869dd 100644
--- a/examples/speedyspeech/baker/frontend.py
+++ b/examples/speedyspeech/baker/frontend.py
@@ -13,6 +13,8 @@
 # limitations under the License.
 
 import re
+from pathlib import Path
+
 import numpy as np
 import paddle
 import pypinyin
@@ -22,10 +24,11 @@ import phkit
 phkit.initialize()
 from parakeet.frontend.vocab import Vocab
 
-with open("phones.txt", 'rt') as f:
+file_dir = Path(__file__).parent.resolve()
+with open(file_dir / "phones.txt", 'rt') as f:
     phones = [line.strip() for line in f.readlines()]
 
-with open("tones.txt", 'rt') as f:
+with open(file_dir / "tones.txt", 'rt') as f:
     tones = [line.strip() for line in f.readlines()]
 voc_phones = Vocab(phones, start_symbol=None, end_symbol=None)
 voc_tones = Vocab(tones, start_symbol=None, end_symbol=None)
diff --git a/examples/speedyspeech/baker/inference.py b/examples/speedyspeech/baker/inference.py
index 7e202a8..3bd4384 100644
--- a/examples/speedyspeech/baker/inference.py
+++ b/examples/speedyspeech/baker/inference.py
@@ -33,7 +33,7 @@ def main():
         help="text to synthesize, a 'utt_id sentence' pair per line")
     parser.add_argument("--output-dir", type=str, help="output dir")
 
-    args = parser.parse_args()
+    args, _ = parser.parse_known_args()
 
     speedyspeech_config = inference.Config(
         str(Path(args.inference_dir) / "speedyspeech.pdmodel"),
diff --git a/examples/speedyspeech/baker/normalize.py b/examples/speedyspeech/baker/normalize.py
index daa0a91..2d1b028 100644
--- a/examples/speedyspeech/baker/normalize.py
+++ b/examples/speedyspeech/baker/normalize.py
@@ -96,6 +96,10 @@ def main():
     # get dataset
     with jsonlines.open(args.metadata, 'r') as reader:
         metadata = list(reader)
+    metadata_dir = Path(args.metadata).parent
+    for item in metadata:
+        item["feats"] = str(metadata_dir / item["feats"])
+
     dataset = DataTable(metadata, converters={'feats': np.load, })
     logging.info(f"The number of files = {len(dataset)}.")
 
@@ -136,7 +140,7 @@ def main():
             'num_phones': item['num_phones'],
             'num_frames': item['num_frames'],
             'durations': item['durations'],
-            'feats': str(mel_path),
+            'feats': str(mel_path.relative_to(dumpdir)),
         })
     output_metadata.sort(key=itemgetter('utt_id'))
     output_metadata_path = Path(args.dumpdir) / "metadata.jsonl"
diff --git a/examples/speedyspeech/baker/preprocess.py b/examples/speedyspeech/baker/preprocess.py
index 1fda34f..0295dee 100644
--- a/examples/speedyspeech/baker/preprocess.py
+++ b/examples/speedyspeech/baker/preprocess.py
@@ -181,7 +181,7 @@ def process_sentence(config: Dict[str, Any],
         "num_phones": len(phones),
         "num_frames": num_frames,
         "durations": durations_frame,
-        "feats": str(mel_path.resolve()),  # use absolute path
+        "feats": mel_path,  # Path object
     }
     return record
 
@@ -212,8 +212,12 @@ def process_sentences(config,
                     results.append(ft.result())
 
     results.sort(key=itemgetter("utt_id"))
-    with jsonlines.open(output_dir / "metadata.jsonl", 'w') as writer:
+    output_dir = Path(output_dir)
+    metadata_path = output_dir / "metadata.jsonl"
+    # NOTE: use relative path to the meta jsonlines file
+    with jsonlines.open(metadata_path, 'w') as writer:
         for item in results:
+            item["feats"] = str(item["feats"].relative_to(output_dir))
             writer.write(item)
     print("Done")
 
diff --git a/examples/speedyspeech/baker/speedyspeech_updater.py b/examples/speedyspeech/baker/speedyspeech_updater.py
index bc4d0f9..bbb65d7 100644
--- a/examples/speedyspeech/baker/speedyspeech_updater.py
+++ b/examples/speedyspeech/baker/speedyspeech_updater.py
@@ -70,7 +70,6 @@ class SpeedySpeechUpdater(StandardUpdater):
 
 class SpeedySpeechEvaluator(StandardEvaluator):
     def evaluate_core(self, batch):
-        print("fire")
         decoded, predicted_durations = self.model(
             text=batch["phones"],
             tones=batch["tones"],
diff --git a/examples/speedyspeech/baker/synthesize.py b/examples/speedyspeech/baker/synthesize.py
index c4b6cb3..0cddf73 100644
--- a/examples/speedyspeech/baker/synthesize.py
+++ b/examples/speedyspeech/baker/synthesize.py
@@ -150,7 +150,7 @@ def main():
         "--device", type=str, default="gpu", help="device type to use")
     parser.add_argument("--verbose", type=int, default=1, help="verbose")
 
-    args = parser.parse_args()
+    args, _ = parser.parse_known_args()
     with open(args.speedyspeech_config) as f:
         speedyspeech_config = CfgNode(yaml.safe_load(f))
     with open(args.pwg_config) as f:
diff --git a/examples/speedyspeech/baker/synthesize_e2e.py b/examples/speedyspeech/baker/synthesize_e2e.py
index af448c8..8bf911b 100644
--- a/examples/speedyspeech/baker/synthesize_e2e.py
+++ b/examples/speedyspeech/baker/synthesize_e2e.py
@@ -57,7 +57,8 @@ def evaluate(args, speedyspeech_config, pwg_config):
     model.eval()
 
     vocoder = PWGGenerator(**pwg_config["generator_params"])
-    vocoder.set_state_dict(paddle.load(args.pwg_params))
+    vocoder.set_state_dict(
+        paddle.load(args.pwg_checkpoint)["generator_params"])
     vocoder.remove_weight_norm()
     vocoder.eval()
     print("model done!")
@@ -133,9 +134,9 @@ def main():
     parser.add_argument(
         "--pwg-config", type=str, help="config file for parallelwavegan.")
     parser.add_argument(
-        "--pwg-params",
+        "--pwg-checkpoint",
         type=str,
-        help="parallel wavegan generator parameters to load.")
+        help="parallel wavegan checkpoint to load.")
     parser.add_argument(
         "--pwg-stat",
         type=str,
@@ -152,7 +153,7 @@ def main():
         "--device", type=str, default="gpu", help="device type to use")
     parser.add_argument("--verbose", type=int, default=1, help="verbose")
 
-    args = parser.parse_args()
+    args, _ = parser.parse_known_args()
     with open(args.speedyspeech_config) as f:
         speedyspeech_config = CfgNode(yaml.safe_load(f))
     with open(args.pwg_config) as f:
diff --git a/examples/speedyspeech/baker/train.py b/examples/speedyspeech/baker/train.py
index d51afec..c185490 100644
--- a/examples/speedyspeech/baker/train.py
+++ b/examples/speedyspeech/baker/train.py
@@ -72,6 +72,10 @@ def train_sp(args, config):
     # construct dataset for training and validation
     with jsonlines.open(args.train_metadata, 'r') as reader:
         train_metadata = list(reader)
+    metadata_dir = Path(args.train_metadata).parent
+    for item in train_metadata:
+        item["feats"] = str(metadata_dir / item["feats"])
+
     train_dataset = DataTable(
         data=train_metadata,
         fields=[
@@ -80,6 +84,9 @@ def train_sp(args, config):
         converters={"feats": np.load, }, )
     with jsonlines.open(args.dev_metadata, 'r') as reader:
         dev_metadata = list(reader)
+    metadata_dir = Path(args.dev_metadata).parent
+    for item in dev_metadata:
+        item["feats"] = str(metadata_dir / item["feats"])
     dev_dataset = DataTable(
         data=dev_metadata,
         fields=[
@@ -113,9 +120,6 @@ def train_sp(args, config):
         num_workers=config.num_workers)
     print("dataloaders done!")
 
-    # batch = collate_baker_examples([train_dataset[i] for i in range(10)])
-    # # batch = collate_baker_examples([dev_dataset[i] for i in range(10)])
-    # import pdb; pdb.set_trace()
     model = SpeedySpeech(**config["model"])
     if world_size > 1:
         model = DataParallel(model)  # TODO, do not use vocab size from config
@@ -141,13 +145,13 @@ def train_sp(args, config):
         trainer.extend(VisualDL(writer), trigger=(1, "iteration"))
         trainer.extend(
             Snapshot(max_size=config.num_snapshots), trigger=(1, 'epoch'))
-    print(trainer.extensions)
+    # print(trainer.extensions)
     trainer.run()
 
 
 def main():
     # parse args and config and redirect to train_sp
-    parser = argparse.ArgumentParser(description="Train a ParallelWaveGAN "
+    parser = argparse.ArgumentParser(description="Train a Speedyspeech "
                                      "model with Baker Mandrin TTS dataset.")
     parser.add_argument(
         "--config", type=str, help="config file to overwrite default config")
@@ -160,12 +164,18 @@ def main():
         "--nprocs", type=int, default=1, help="number of processes")
     parser.add_argument("--verbose", type=int, default=1, help="verbose")
 
-    args = parser.parse_args()
+    args, rest = parser.parse_known_args()
     if args.device == "cpu" and args.nprocs > 1:
         raise RuntimeError("Multiprocess training on CPU is not supported.")
     config = get_cfg_default()
     if args.config:
         config.merge_from_file(args.config)
+    if rest:
+        extra = []
+        # to support key=value format
+        for item in rest:
+            extra.extend(item.split("=", maxsplit=1))
+        config.merge_from_list(extra)
 
     print("========Args========")
     print(yaml.safe_dump(vars(args)))
diff --git a/setup.py b/setup.py
index 8b48a8d..7408415 100644
--- a/setup.py
+++ b/setup.py
@@ -64,7 +64,7 @@ setup_info = dict(
         'scipy',
         'pandas',
         'sox',
-        'soundfile',
+        'soundfile~=0.10',
         'g2p_en',
         'yacs',
         'visualdl',
@@ -78,6 +78,7 @@ setup_info = dict(
         'pyworld',
         'typeguard',
         'jieba',
+        "phkit",
     ],
     extras_require={'doc': ["sphinx", "sphinx-rtd-theme", "numpydoc"], },
 
diff --git a/tests/test_data_table.py b/tests/unit/test_data_table.py
similarity index 100%
rename from tests/test_data_table.py
rename to tests/unit/test_data_table.py
diff --git a/tests/test_expansion.py b/tests/unit/test_expansion.py
similarity index 100%
rename from tests/test_expansion.py
rename to tests/unit/test_expansion.py
diff --git a/tests/test_optimizer.py b/tests/unit/test_optimizer.py
similarity index 100%
rename from tests/test_optimizer.py
rename to tests/unit/test_optimizer.py
diff --git a/tests/test_pwg.py b/tests/unit/test_pwg.py
similarity index 100%
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diff --git a/tests/test_raise.py b/tests/unit/test_raise.py
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diff --git a/tests/test_reporter.py b/tests/unit/test_reporter.py
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diff --git a/tests/test_snapshot.py b/tests/unit/test_snapshot.py
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diff --git a/tests/test_stft.py b/tests/unit/test_stft.py
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diff --git a/tests/test_to_static.py b/tests/unit/test_to_static.py
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