diff --git a/scripts/upgrade b/scripts/upgrade
index 4308a7e..7b2688f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -44,7 +44,8 @@ then
 	popd
 	# Remove installation directory
 	ynh_secure_remove --file="$install_dir/installation"
-
+        # Fix #34
+        ynh_secure_remove --file="$install_dir/administrator/cache/autoload_psr4.php" 
 fi
 
 chmod -R o-rwx "$install_dir"
diff --git a/tests.toml b/tests.toml
index cbbeef1..24d78c1 100644
--- a/tests.toml
+++ b/tests.toml
@@ -1,3 +1,8 @@
 test_format = 1.0
 
 [default]
+
+    # -------------------------------
+    # Commits to test upgrade from
+    # -------------------------------
+    test_upgrade_from.08222d1d.name = "Upgrade from 4.2.6"