diff --git a/hasspy/mqtt.py b/hasspy/mqtt.py
index bb7b9ce..76932a1 100644
--- a/hasspy/mqtt.py
+++ b/hasspy/mqtt.py
@@ -351,6 +351,6 @@ class HassUserClient(HassClient):
 def run_command(cmd: list[str]) -> Tuple[int, str]:
     proc = run(cmd, capture_output=True)
     if proc.returncode != 0:
-        return proc.returncode, "null"
+        return proc.returncode, ""
 
     return proc.returncode, proc.stdout.decode("utf-8")