diff --git a/homeassistant/components/ssdp/descriptions.py b/homeassistant/components/ssdp/descriptions.py
index a6fda3685f2..def302641ed 100644
--- a/homeassistant/components/ssdp/descriptions.py
+++ b/homeassistant/components/ssdp/descriptions.py
@@ -42,7 +42,7 @@ class DescriptionManager:
     @callback
     def async_cached_description(self, xml_location: str) -> None | dict[str, str]:
         """Fetch the description from the cache."""
-        return self._description_cache[xml_location]
+        return self._description_cache.get(xml_location)
 
     async def _fetch_description(self, xml_location: str) -> None | dict[str, str]:
         """Fetch an XML description."""
diff --git a/tests/components/ssdp/test_init.py b/tests/components/ssdp/test_init.py
index 6dfdc02f6e7..f5418bd227e 100644
--- a/tests/components/ssdp/test_init.py
+++ b/tests/components/ssdp/test_init.py
@@ -189,6 +189,7 @@ async def test_scan_description_fetch_fail(hass, aioclient_mock, exc):
     aioclient_mock.get("http://1.1.1.1", exc=exc)
     mock_ssdp_response = {
         "st": "mock-st",
+        "usn": "uuid:TIVRTLSR7ANF-D6E-1557809135086-RETAIL::urn:mdx-netflix-com:service:target:3",
         "location": "http://1.1.1.1",
     }
     mock_get_ssdp = {
@@ -203,6 +204,15 @@ async def test_scan_description_fetch_fail(hass, aioclient_mock, exc):
 
     assert not mock_init.mock_calls
 
+    assert ssdp.async_get_discovery_info_by_st(hass, "mock-st") == [
+        {
+            "UDN": "uuid:TIVRTLSR7ANF-D6E-1557809135086-RETAIL",
+            "ssdp_location": "http://1.1.1.1",
+            "ssdp_st": "mock-st",
+            "ssdp_usn": "uuid:TIVRTLSR7ANF-D6E-1557809135086-RETAIL::urn:mdx-netflix-com:service:target:3",
+        }
+    ]
+
 
 async def test_scan_description_parse_fail(hass, aioclient_mock):
     """Test invalid XML."""