diff --git a/tools/run-mypy b/tools/run-mypy
index 4c02e67..45a5ce2 100755
--- a/tools/run-mypy
+++ b/tools/run-mypy
@@ -23,7 +23,6 @@ zulip/integrations/perforce/git_p4.py
 
 zulip_bots/zulip_bots/bots
 
-zulip_botserver/tests/__init__.py
 zulip_botserver/zulip_botserver/server.py
 zulip_botserver/setup.py
 """.split()
diff --git a/zulip_botserver/tests/__init__.py b/zulip_botserver/tests/__init__.py
index bb61062..9c5ca6a 100644
--- a/zulip_botserver/tests/__init__.py
+++ b/zulip_botserver/tests/__init__.py
@@ -1,2 +1,4 @@
 import pkgutil
-__path__ = pkgutil.extend_path(__path__, __name__)
+from typing import Iterable, Text
+
+__path__ = pkgutil.extend_path(__path__, __name__)  # type: Iterable[Text]