diff --git a/{{cookiecutter.project_slug}}/.readthedocs.yml b/{{cookiecutter.project_slug}}/.readthedocs.yml
index 1b6020f3..b4cf0c08 100644
--- a/{{cookiecutter.project_slug}}/.readthedocs.yml
+++ b/{{cookiecutter.project_slug}}/.readthedocs.yml
@@ -3,6 +3,9 @@ version: 2
 sphinx:
   configuration: docs/conf.py
 
+build:
+  image: testing
+
 python:
   version: 3.9
   install: