diff --git a/.mypy.ini b/.mypy.ini
new file mode 100644
index 0000000..c8b86c7
--- /dev/null
+++ b/.mypy.ini
@@ -0,0 +1,4 @@
+[mypy]
+
+[mypy-pytest]
+ignore_missing_imports = True
diff --git a/tests/base.py b/tests/base.py
index b0728be..ef9b87b 100644
--- a/tests/base.py
+++ b/tests/base.py
@@ -4,7 +4,7 @@ import unittest
 
 
 class BaseTest(unittest.TestCase):
-    TEST_FILE_PY = None
+    TEST_FILE_PY = None  # type: str
 
     def do_test(self, *args):
         popen_kwargs = dict(