diff --git a/backend/decisions-services-code-style.md b/backend/decisions-app-code.md
similarity index 75%
rename from backend/decisions-services-code-style.md
rename to backend/decisions-app-code.md
index 4d89c1b..3d8b9c3 100644
--- a/backend/decisions-services-code-style.md
+++ b/backend/decisions-app-code.md
@@ -1,11 +1,22 @@
 ---
 layout: page
-title: "Architecture Decisions: Services & Code Style"
+title: "Architecture Decisions: App & Code"
 nav_order: 1000
 parent: Backend
 ---
 
-# Architecture Decisions: Services & Code Style
+# Architecture Decisions: App & Code
+
+
+## The environment is forced to `test` in the tests, can never be `test` when running the application, and the `test` environment only read its configuration from `config.yaml.test`, and never from `config.yaml`
+
+Date: 05/06/2024
+
+Why?
+- We want to make sure tests are never run on a live database because they erase all the data.
+
+More info and discussion: https://github.com/France-ioi/AlgoreaBackend/pull/1085
+
 
 ## Fields that are not visible to the user due to access rights must not appear in the response at all
 
diff --git a/backend/dev-process.md b/backend/dev-process.md
index e992341..111128b 100644
--- a/backend/dev-process.md
+++ b/backend/dev-process.md
@@ -54,7 +54,7 @@ parent: Backend
 - [ ] it renders correctly. Verify locally with the command: "**make serve-swagger**".
 - [ ] the fields of the request and response have the correct annotations (required, Nullable, ...).
 
-See [Architecture Decisions: Services & Code Style]({{ site.baseurl }}/backend/decisions-services-code-style/).
+See [Architecture Decisions: App & Code]({{ site.baseurl }}/backend/decisions-app-code/).
 
 **Swagger tip:** You need to have 2 empty lines between paragraphs, otherwise the generated documentation will have everything on the same line.