diff --git a/tasks.py b/tasks.py
index fc489852..9818776e 100644
--- a/tasks.py
+++ b/tasks.py
@@ -1 +1,12 @@
+from invoke import task
+
 from dmdevtools.invoke_tasks import library_tasks as ns
+
+
+@task(ns["virtualenv"], ns["requirements_dev"])
+def test_mypy(c):
+    c.run("mypy dmutils/")
+
+
+ns.add_task(test_mypy)
+ns["test"].pre.insert(-1, test_mypy)