diff --git a/hh_autoload.json b/hh_autoload.json
index 0f01449..28ea687 100644
--- a/hh_autoload.json
+++ b/hh_autoload.json
@@ -1,5 +1,5 @@
 {
     "roots": ["src/"],
-    "devRoots": [],
+    "devRoots": ["tests/"],
     "devFailureHandler": "Facebook\\AutoloadMap\\HHClientFallbackHandler"
 }