diff --git a/package_linter.py b/package_linter.py
index b348870..3f4e04d 100755
--- a/package_linter.py
+++ b/package_linter.py
@@ -581,6 +581,16 @@ class App(TestSuite):
         if os.system("grep -q -nr '/etc/ssowat/conf.json.persistent' %s/*/* 2>/dev/null" % self.path) == 0:
             yield Error("Don't do black magic with /etc/ssowat/conf.json.persistent !")
 
+    @test()
+    def app_data_in_unofficial_dir(self):
+
+        allowed_locations = ["yunohost.app", "yunohost.conf", "yunohost.backup", "yunohost.multimedia"]
+        cmd = "grep -IhEro '/home/yunohost[^/ ]*/' %s/scripts || true" % self.path
+        home_locations = subprocess.check_output(cmd, shell=True).decode('utf-8').strip().split("\n")
+        forbidden_locations = set([location for location in home_locations if location and location not in allowed_locations])
+
+        if forbidden_locations:
+            yield Warning("The app seems to be storing data in the 'forbidden' locations %s. The recommended pratice is rather to store data in /home/yunohost.app/$app or /home/yunohost.multimedia (depending on the use case)" % ', '.join(forbidden_locations))
 
 
 class Configurations(TestSuite):