diff --git a/.isort.cfg b/.isort.cfg
new file mode 100644
index 00000000..4d17c9c8
--- /dev/null
+++ b/.isort.cfg
@@ -0,0 +1,6 @@
+[settings]
+multi_line_output=3
+include_trailing_comma=True
+force_grid_wrap=0
+use_parentheses=True
+line_length=100
diff --git a/.travis.yml b/.travis.yml
index 9fbf9433..ee58dd62 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -37,6 +37,10 @@ matrix:
     sudo: required
     python: 3.7
     env: TOXENV=py37-vulture
+  - os: linux
+    sudo: required
+    python: 3.7
+    env: TOXENV=py37-isort
   - os: linux
     sudo: required
     python: pypy3.5-6.0
diff --git a/hug/__init__.py b/hug/__init__.py
index 297ba78c..2600bd3f 100644
--- a/hug/__init__.py
+++ b/hug/__init__.py
@@ -34,7 +34,6 @@
 from falcon import *
 
 from hug import (
-    authentication,
     directives,
     exceptions,
     format,
@@ -89,11 +88,11 @@
 )
 from hug.types import create as type
 
-# The following imports must be imported last for defaults to have access to all modules
+# The following imports must be imported last; in particular, defaults to have access to all modules
+from hug import authentication  # isort:skip
 from hug import development_runner  # isort:skip
 from hug import defaults  # isort:skip
 
-
 try:  # pragma: no cover - defaulting to uvloop if it is installed
     import uvloop
     import asyncio
diff --git a/requirements/build_common.txt b/requirements/build_common.txt
index bd32ae27..567795e0 100644
--- a/requirements/build_common.txt
+++ b/requirements/build_common.txt
@@ -1,6 +1,5 @@
 -r common.txt
 flake8==3.3.0
-isort==4.2.5
 pytest-cov==2.4.0
 pytest==4.3.1
 python-coveralls==2.9.0
diff --git a/requirements/build_style_tools.txt b/requirements/build_style_tools.txt
index a24c2023..063c2e98 100644
--- a/requirements/build_style_tools.txt
+++ b/requirements/build_style_tools.txt
@@ -1,6 +1,7 @@
 -r build_common.txt
 black==19.3b0
+isort==4.3.20
 pep8-naming==0.8.2
 flake8-bugbear==19.3.0
 vulture==1.0
-bandit==1.6.0
\ No newline at end of file
+bandit==1.6.0
diff --git a/tests/test_full_request.py b/tests/test_full_request.py
index f7f339a8..56866138 100644
--- a/tests/test_full_request.py
+++ b/tests/test_full_request.py
@@ -39,11 +39,13 @@ def post(body, response):
 """
 
 
-@pytest.mark.skipif(platform.python_implementation() == "PyPy", reason="Can't run hug CLI from travis PyPy")
+@pytest.mark.skipif(
+    platform.python_implementation() == "PyPy", reason="Can't run hug CLI from travis PyPy"
+)
 def test_hug_post(tmp_path):
-    hug_test_file = (tmp_path / "hug_postable.py")
+    hug_test_file = tmp_path / "hug_postable.py"
     hug_test_file.write_text(TEST_HUG_API)
-    hug_server = Popen(['hug', '-f', str(hug_test_file), '-p', '3000'])
+    hug_server = Popen(["hug", "-f", str(hug_test_file), "-p", "3000"])
     time.sleep(5)
-    requests.post('http://127.0.0.1:3000/test', {'data': 'here'})
+    requests.post("http://127.0.0.1:3000/test", {"data": "here"})
     hug_server.kill()
diff --git a/tox.ini b/tox.ini
index 4393037b..502d5c53 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,6 +43,14 @@ deps=
 whitelist_externals=flake8
 commands=bandit -r hug/ -ll
 
+[testenv:py37-isort]
+deps=
+    -rrequirements/build_style_tools.txt
+    marshmallow >=3.0.0rc5
+
+whitelist_externals=flake8
+commands=isort -c --diff --recursive hug
+
 [testenv:pywin]
 deps =-rrequirements/build_windows.txt
 basepython = {env:PYTHON:}\python.exe