diff --git a/tests/components/modbus/common.yaml b/tests/components/modbus/common.yaml
index d636143ec9..a8f1ff30a9 100644
--- a/tests/components/modbus/common.yaml
+++ b/tests/components/modbus/common.yaml
@@ -1,3 +1,5 @@
+# comment
+
 modbus:
   id: mod_bus1
   flow_control_pin: ${flow_control_pin}