diff --git a/tests/components/command_line/test_binary_sensor.py b/tests/components/command_line/test_binary_sensor.py
index 7d5db4603fe..9787728965e 100644
--- a/tests/components/command_line/test_binary_sensor.py
+++ b/tests/components/command_line/test_binary_sensor.py
@@ -304,7 +304,7 @@ async def test_updating_manually(
         await hass.async_block_till_done()
 
     assert called
-    called.clear
+    called.clear()
 
     await hass.services.async_call(
         HA_DOMAIN,