diff --git a/homeassistant/components/sonos/__init__.py b/homeassistant/components/sonos/__init__.py
index d16fd6cc6ea..48c4a614ca4 100644
--- a/homeassistant/components/sonos/__init__.py
+++ b/homeassistant/components/sonos/__init__.py
@@ -493,7 +493,8 @@ class SonosDiscoveryManager:
                     self.hass, f"{SONOS_SPEAKER_ACTIVITY}-{uid}", source
                 )
 
-    async def _async_ssdp_discovered_player(
+    @callback
+    def _async_ssdp_discovered_player(
         self, info: ssdp.SsdpServiceInfo, change: ssdp.SsdpChange
     ) -> None:
         uid = info.upnp[ssdp.ATTR_UPNP_UDN]
diff --git a/tests/components/sonos/conftest.py b/tests/components/sonos/conftest.py
index f46023a05de..d9600b9f1e5 100644
--- a/tests/components/sonos/conftest.py
+++ b/tests/components/sonos/conftest.py
@@ -240,8 +240,8 @@ async def silent_ssdp_scanner(hass):
 def discover_fixture(soco):
     """Create a mock soco discover fixture."""
 
-    async def do_callback(hass, callback, *args, **kwargs):
-        await callback(
+    def do_callback(hass, callback, *args, **kwargs):
+        callback(
             ssdp.SsdpServiceInfo(
                 ssdp_location=f"http://{soco.ip_address}/",
                 ssdp_st="urn:schemas-upnp-org:device:ZonePlayer:1",