diff --git a/adev/src/content/guide/testing/services.md b/adev/src/content/guide/testing/services.md
index fa6ba4da5fa..229af73c104 100644
--- a/adev/src/content/guide/testing/services.md
+++ b/adev/src/content/guide/testing/services.md
@@ -1,3 +1,5 @@
+TEST
+
 # Testing services
 
 To check that your services are working as you intend, you can write tests specifically for them.