diff --git a/Makefile b/Makefile
index 45dd293..55d8fee 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ all:
 
 .PHONY: lint
 lint:
-	mypy --config-file mypy.conf *.py slackclient localslackirc
+	mypy --config-file mypy.conf *.py slackclient localslackirc lsi-getconf
 
 .PHONY: test
 test: lint
diff --git a/lsi-getconf b/lsi-getconf
index 2d21f84..b5d4e26 100755
--- a/lsi-getconf
+++ b/lsi-getconf
@@ -105,6 +105,9 @@ def main() -> None:
 
     # TODO chromium
 
+    if not cookies and not tokens:
+        sys.exit('Fail: Nothing was found')
+
     print('# ==============')
     if tokens:
         print('# Tokens found:')