diff --git a/tests/components/local_file/test_camera.py b/tests/components/local_file/test_camera.py
index b9b2b19832e..8432420244e 100644
--- a/tests/components/local_file/test_camera.py
+++ b/tests/components/local_file/test_camera.py
@@ -14,6 +14,9 @@ async def test_loading_file(hass, hass_client):
 
     with mock.patch("os.path.isfile", mock.Mock(return_value=True)), mock.patch(
         "os.access", mock.Mock(return_value=True)
+    ), mock.patch(
+        "homeassistant.components.local_file.camera.mimetypes.guess_type",
+        mock.Mock(return_value=(None, None)),
     ):
         await async_setup_component(
             hass,
@@ -138,6 +141,9 @@ async def test_update_file_path(hass):
 
     with mock.patch("os.path.isfile", mock.Mock(return_value=True)), mock.patch(
         "os.access", mock.Mock(return_value=True)
+    ), mock.patch(
+        "homeassistant.components.local_file.camera.mimetypes.guess_type",
+        mock.Mock(return_value=(None, None)),
     ):
 
         camera_1 = {"platform": "local_file", "file_path": "mock/path.jpg"}