diff --git a/.travis.yml b/.travis.yml
index c260a86..6bbfe44 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,14 @@
 language: python
 python: 3.7
 
+install:
+  - pip install flake8
+
 script:
   - script/fetch-fixtures
+  - script/lint
   - script/test
 
 branches:
   only:
     - master
diff --git a/script/lint b/script/lint
new file mode 100755
index 0000000..e92006c
--- /dev/null
+++ b/script/lint
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+sources=$(git ls-files | grep '.py$')
+flake8 --max-line-length 90 $sources
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 40c64c1..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,20 +0,0 @@
-[tox]
-envlist = lint, py
-
-[testenv:py]
-deps = pytest
-commands = pytest {posargs:tests}
-
-[testenv:lint]
-deps =
-    black
-    flake8
-    pylint
-commands =
-    black -l 79 tree_sitter/__init__.py setup.py tests/test_tree_sitter.py
-    flake8 tree_sitter/__init__.py setup.py tests/test_tree_sitter.py
-    pylint tree_sitter/__init__.py setup.py tests/test_tree_sitter.py
-
-[flake8]
-exclude = node_modules
-ignore = E203,W503,F401