diff --git a/NON-APPROVED/.dummy b/NON-APPROVED/.dummy
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/README.md b/README.md
index 95ae1c3d66debe343a4eadfc0211cafd88260bf1..957bfbbaa4695f2c9f38983cca197b71c51cab07 100644
--- a/README.md
+++ b/README.md
@@ -20,16 +20,20 @@ ess-opis/
 │   ├── neutron-instruments
 │   ├── personnel-safety-systems
 │   └── target-station
-└── ENGINEERING
-    ├── accelerator
-    ├── central-services
-    ├── COMMON
-    ├── machine-protection-system
-    ├── neutron-instruments
-    ├── personnel-safety-systems
-    └── target-station
+├── ENGINEERING
+│   ├── accelerator
+│   ├── central-services
+│   ├── COMMON
+│   ├── machine-protection-system
+│   ├── neutron-instruments
+│   ├── personnel-safety-systems
+│   └── target-station
+└── NON-APPROVED
 ```
 
+The NON-APPROVED directory is used for OPI files that don't meet the standard yet, but
+that need to be deployed for testing purpose.
+
 Each COMMON folder should be used to contain OPIs common to that level.
 The folder has the following structure: