diff --git a/.travis.yml b/.travis.yml
index 2e66665..3d3c7af 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,7 +21,7 @@ install:
 
 # command to run tests, e.g. python setup.py test
 script:
-  - coverage run --source simpleneighbors setup.py test --verbose
+  - coverage run --source simpleneighbors tests/test_simpleneighbors.py --verbose
   - python -m doctest simpleneighbors/__init__.py
 
 after_success:
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/setup.py b/setup.py
index 4b7a8ba..1a5a550 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,6 @@
         'sklearn': ['scikit-learn>=0.20'],
         'purepython': [],
         'dev': [
-            'numpy==1.15.4',  # see https://github.com/numpy/numpy/issues/14012
             'annoy>=1.16.0',
             'scikit-learn>=0.20',
             'mock;python_version<="2.7"',
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 96a8f23..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,23 +0,0 @@
-[tox]
-skipsdist = True
-usedevelop = True
-envlist = py{27,36,37},
-          flake8
-
-[testenv]
-install_command = pip install -e ".[dev]" -U {packages}
-basepython =
-    py27: python2.7
-    py36: python3.6
-    py37: python3.7
-deps =
-    -r{toxinidir}/requirements.txt
-commands = python setup.py test
-
-[testenv:flake8]
-basepython =
-    python3.6
-deps =
-    flake8
-commands =
-    flake8 simpleneighbors