diff --git a/scripts/isort b/scripts/isort
new file mode 100755
index 000000000..c3b437802
--- /dev/null
+++ b/scripts/isort
@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+
+isort --recursive --check-only --settings-path setup.cfg .
diff --git a/setup.cfg b/setup.cfg
index e26fdfc29..c067a7b52 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,3 +8,11 @@ addopts = --cov-report term-missing:skip-covered --cov=borgmatic --ignore=tests/
 [flake8]
 ignore = E501,W503
 exclude = *.*/*
+
+[tool:isort]
+force_single_line = False
+include_trailing_comma = True
+known_first_party = borgmatic
+line_length = 100
+multi_line_output = 3
+skip = .tox
diff --git a/test_requirements.txt b/test_requirements.txt
index 399a28c85..1b50a7463 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -8,6 +8,7 @@ coverage==4.5.1
 docopt==0.6.2
 flake8==3.5.0
 flexmock==0.10.2
+isort==4.3.19
 mccabe==0.6.1
 more-itertools==4.3.0
 pluggy==0.7.1
diff --git a/tox.ini b/tox.ini
index 0701b1686..626eee044 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ install_command =
 commands =
     pytest
     sh scripts/black
+    sh scripts/isort
     flake8 .
 
 [testenv:black]
@@ -24,3 +25,8 @@ commands =
 deps = -rtest_requirements.txt
 commands =
     pytest tests/end-to-end
+
+[testenv:isort]
+deps = {[testenv]deps}
+commands =
+    isort {posargs:--recursive} --settings-path setup.cfg .