diff --git a/tests/components/api/test_init.py b/tests/components/api/test_init.py
index 570bb980aba..04c186bf211 100644
--- a/tests/components/api/test_init.py
+++ b/tests/components/api/test_init.py
@@ -349,6 +349,16 @@ async def test_api_template(hass: HomeAssistant, mock_api_client: TestClient) ->
 
     assert body == "10"
 
+    hass.states.async_set("sensor.temperature", 20)
+    resp = await mock_api_client.post(
+        const.URL_API_TEMPLATE,
+        json={"template": "{{ states.sensor.temperature.state }}"},
+    )
+
+    body = await resp.text()
+
+    assert body == "20"
+
 
 async def test_api_template_error(
     hass: HomeAssistant, mock_api_client: TestClient