diff --git a/package.json b/package.json
index ef1899ff2..5cd362c28 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,7 @@
     "request-progress": "^0.3",
     "runas": "^3.1",
     "rx-lite": "^4.0.7",
+    "rx-lite-testing": "^4.0.7",
     "sanitize-html": "1.9.0",
     "scoped-property-store": "^0.16.2",
     "season": "^5.1",