diff --git a/requirements.txt b/requirements.txt
index 1c9c28fbbb..e9ea7e0f4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,7 @@ prettytable
 Jinja2
 IntelHex
 mbed-ls
+mbed-greentea
 project-generator>=0.8.11,<0.9.0
 junit-xml
 requests