install matplotlib

.github/workflows/test-workflow.yml

@@ -24,6 +24,7 @@ jobs:
         sudo apt-get install -y libsox-dev
         python -m pip install --upgrade pip
         python -m pip install torch torchaudio --index-url https://download.pytorch.org/whl/cpu
+        python -m pip install matplotlib
         python -m pip install pytest
         python -m pip install .
     - name: Test with pytest

tests/test_cli.py

@@ -5,7 +5,6 @@ import os
 import pytest
 
 import torch
-import torchaudio
 
 
 AUDIOS_DIR = os.path.join(os.path.dirname(__file__), "audios")