diff --git a/src/caustics/__init__.py b/src/caustics/__init__.py
index 5bc6f757..f46fcda9 100644
--- a/src/caustics/__init__.py
+++ b/src/caustics/__init__.py
@@ -8,6 +8,7 @@
 from .light import *
 from .utils import *
 from .sims import *
+from .tests import *
 
 # from .demo import *