diff --git a/.coveragerc b/.coveragerc
index 776a84bc5eb..ed14d33a5ae 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1303,6 +1303,7 @@ omit =
     homeassistant/components/waze_travel_time/helpers.py
     homeassistant/components/waze_travel_time/sensor.py
     homeassistant/components/whois/__init__.py
+    homeassistant/components/whois/diagnostics.py
     homeassistant/components/whois/sensor.py
     homeassistant/components/wiffi/*
     homeassistant/components/wirelesstag/*