diff --git a/Makefile b/Makefile
index 07071234..7cf13a1a 100644
--- a/Makefile
+++ b/Makefile
@@ -15,8 +15,14 @@ all:
 clean:
 	@echo "Clean files"
 	for SCENARIO in $(SCENARIOS); do
-		find "$${SCENARIO}" -name '*_test.yml' -exec rm {} \;
-		find "$${SCENARIO}" -name '*.csv' -exec rm {} \;
+		find "$${SCENARIO}" -type f \( \
+			-name 'callforward.yml' -o \
+			-name 'trusted.yml' -o \
+  			-name 'lnp.yml' -o \
+			-name 'prefs.json' -o \
+			-name '*_test.yml' -o \
+			-name '*.csv' \
+			\) -exec rm {} \;
 	done
 
 syntaxcheck: bashismcheck perlcheck pythoncheck shellcheck
diff --git a/scenarios_lnp/invite_peerout/prefs.json b/scenarios_lnp/invite_peerout/prefs.json
deleted file mode 100644
index 882f8c9f..00000000
--- a/scenarios_lnp/invite_peerout/prefs.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "testuser1002@invite-peerout.scenarios-lnp.test": {
-        "rewrite_rule_set": "rw_invite_peerout_lnp"
-    },
-    "peer_invite_peerout_host0": {
-        "concurrent_max": 1,
-        "rewrite_rule_set": "rw_invite_peerout_lnp",
-        "lnp_add_npdi": true
-    }
-}