diff --git a/.travis.yml b/.travis.yml
index 2593ad0..f4c504a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,12 +2,10 @@ dist: xenial
 language: python
 
 python:
-    - "3.4"
-    - "3.5"
     - "3.6"
     - "3.7"
     - "3.8"
-    - "pypy3.6-7.1.1"
+    - "pypy3"
 matrix:
     include:
     - python: "3.7"
diff --git a/CHANGES.txt b/CHANGES.txt
index 9b67415..f63c3ad 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -4,7 +4,9 @@ CHANGES
 0.3 (unreleased)
 ----------------
 
-- Nothing changed yet.
+- Drop support for Python 3.4 and 3.5.
+
+- Fix Flake8 errors.
 
 
 0.2 (2020-01-29)
diff --git a/pyproject.toml b/pyproject.toml
index 38395a6..51e4886 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.black]
 line-length = 80
-target-version = ['py34', 'py35', 'py36', 'py37', 'py38']
+target-version = ['py36', 'py37', 'py38']
 include = '\.pyi?$'
 exclude = '''
 (
diff --git a/setup.py b/setup.py
index 2a957c2..565a442 100644
--- a/setup.py
+++ b/setup.py
@@ -15,8 +15,6 @@
     classifiers=[
         "Intended Audience :: Developers",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
diff --git a/tox.ini b/tox.ini
index 7f65f83..3351156 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py34, py35, py36, py37, py38, pypy3, coverage, pep8
+envlist = py36, py37, py38, pypy3, coverage, pep8
 skipsdist = True
 skip_missing_interpreters = True
 
@@ -7,18 +7,18 @@ skip_missing_interpreters = True
 usedevelop = True
 extras = test
 
-commands = py.test {posargs}
+commands = pytest {posargs}
 
 [testenv:coverage]
 basepython = python3.7
 extras = test
          coverage
 
-commands = py.test --cov {posargs}
+commands = pytest --cov {posargs}
 
 [testenv:pep8]
 basepython = python3.7
 extras = pep8
 
-commands = flake8 importscan *.py
+commands = flake8 importscan
            black --check .