diff --git a/.drone.yml b/.drone.yml
index 30930f6..ccc753f 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -9,12 +9,19 @@ steps:
       - black --check --diff --quiet .
     depends_on: []
 
+  - name: pyflakes
+    image: alpine/flake8:3.9.2
+    commands:
+      - pyflakes .
+    depends_on: []
+
   - name: test-python-3.8
     image: python:3.8-slim
     commands:
       - python test.py
     depends_on:
       - black
+      - pyflakes
 
   - name: test-python-3.9
     image: python:3.9-slim
@@ -22,3 +29,4 @@ steps:
       - python test.py
     depends_on:
       - black
+      - pyflakes
diff --git a/test.py b/test.py
index 325cad8..7f98c3e 100644
--- a/test.py
+++ b/test.py
@@ -1,4 +1,3 @@
-from argparse import ArgumentError, ArgumentTypeError
 import unittest
 from typing import List