diff --git a/tests/components/brother/fixtures/diagnostics_data.json b/tests/components/brother/fixtures/diagnostics_data.json
deleted file mode 100644
index fd22f861e8d..00000000000
--- a/tests/components/brother/fixtures/diagnostics_data.json
+++ /dev/null
@@ -1,66 +0,0 @@
-{
-  "black_counter": null,
-  "black_ink": null,
-  "black_ink_remaining": null,
-  "black_ink_status": null,
-  "cyan_counter": null,
-  "bw_counter": 709,
-  "belt_unit_remaining_life": 97,
-  "belt_unit_remaining_pages": 48436,
-  "black_drum_counter": 1611,
-  "black_drum_remaining_life": 92,
-  "black_drum_remaining_pages": 16389,
-  "black_toner": 80,
-  "black_toner_remaining": 75,
-  "black_toner_status": 1,
-  "color_counter": 902,
-  "cyan_drum_counter": 1611,
-  "cyan_drum_remaining_life": 92,
-  "cyan_drum_remaining_pages": 16389,
-  "cyan_ink": null,
-  "cyan_ink_remaining": null,
-  "cyan_ink_status": null,
-  "cyan_toner": 10,
-  "cyan_toner_remaining": 10,
-  "cyan_toner_status": 1,
-  "drum_counter": 986,
-  "drum_remaining_life": 92,
-  "drum_remaining_pages": 11014,
-  "drum_status": 1,
-  "duplex_unit_pages_counter": 538,
-  "firmware": "1.17",
-  "fuser_remaining_life": 97,
-  "fuser_unit_remaining_pages": null,
-  "image_counter": null,
-  "laser_remaining_life": null,
-  "laser_unit_remaining_pages": 48389,
-  "magenta_counter": null,
-  "magenta_drum_counter": 1611,
-  "magenta_drum_remaining_life": 92,
-  "magenta_drum_remaining_pages": 16389,
-  "magenta_ink": null,
-  "magenta_ink_remaining": null,
-  "magenta_ink_status": null,
-  "magenta_toner": 10,
-  "magenta_toner_remaining": 8,
-  "magenta_toner_status": 2,
-  "model": "HL-L2340DW",
-  "page_counter": 986,
-  "pf_kit_1_remaining_life": 98,
-  "pf_kit_1_remaining_pages": 48741,
-  "pf_kit_mp_remaining_life": null,
-  "pf_kit_mp_remaining_pages": null,
-  "serial": "0123456789",
-  "status": "waiting",
-  "uptime": "2019-09-24T12:14:56+00:00",
-  "yellow_counter": null,
-  "yellow_drum_counter": 1611,
-  "yellow_drum_remaining_life": 92,
-  "yellow_drum_remaining_pages": 16389,
-  "yellow_ink": null,
-  "yellow_ink_remaining": null,
-  "yellow_ink_status": null,
-  "yellow_toner": 10,
-  "yellow_toner_remaining": 2,
-  "yellow_toner_status": 2
-}
diff --git a/tests/components/brother/snapshots/test_diagnostics.ambr b/tests/components/brother/snapshots/test_diagnostics.ambr
new file mode 100644
index 00000000000..1bff613e557
--- /dev/null
+++ b/tests/components/brother/snapshots/test_diagnostics.ambr
@@ -0,0 +1,75 @@
+# serializer version: 1
+# name: test_entry_diagnostics
+  dict({
+    'data': dict({
+      'belt_unit_remaining_life': 97,
+      'belt_unit_remaining_pages': 48436,
+      'black_counter': None,
+      'black_drum_counter': 1611,
+      'black_drum_remaining_life': 92,
+      'black_drum_remaining_pages': 16389,
+      'black_ink': None,
+      'black_ink_remaining': None,
+      'black_ink_status': None,
+      'black_toner': 80,
+      'black_toner_remaining': 75,
+      'black_toner_status': 1,
+      'bw_counter': 709,
+      'color_counter': 902,
+      'cyan_counter': None,
+      'cyan_drum_counter': 1611,
+      'cyan_drum_remaining_life': 92,
+      'cyan_drum_remaining_pages': 16389,
+      'cyan_ink': None,
+      'cyan_ink_remaining': None,
+      'cyan_ink_status': None,
+      'cyan_toner': 10,
+      'cyan_toner_remaining': 10,
+      'cyan_toner_status': 1,
+      'drum_counter': 986,
+      'drum_remaining_life': 92,
+      'drum_remaining_pages': 11014,
+      'drum_status': 1,
+      'duplex_unit_pages_counter': 538,
+      'firmware': '1.17',
+      'fuser_remaining_life': 97,
+      'fuser_unit_remaining_pages': None,
+      'image_counter': None,
+      'laser_remaining_life': None,
+      'laser_unit_remaining_pages': 48389,
+      'magenta_counter': None,
+      'magenta_drum_counter': 1611,
+      'magenta_drum_remaining_life': 92,
+      'magenta_drum_remaining_pages': 16389,
+      'magenta_ink': None,
+      'magenta_ink_remaining': None,
+      'magenta_ink_status': None,
+      'magenta_toner': 10,
+      'magenta_toner_remaining': 8,
+      'magenta_toner_status': 2,
+      'model': 'HL-L2340DW',
+      'page_counter': 986,
+      'pf_kit_1_remaining_life': 98,
+      'pf_kit_1_remaining_pages': 48741,
+      'pf_kit_mp_remaining_life': None,
+      'pf_kit_mp_remaining_pages': None,
+      'serial': '0123456789',
+      'status': 'waiting',
+      'uptime': '2019-09-24T12:14:56+00:00',
+      'yellow_counter': None,
+      'yellow_drum_counter': 1611,
+      'yellow_drum_remaining_life': 92,
+      'yellow_drum_remaining_pages': 16389,
+      'yellow_ink': None,
+      'yellow_ink_remaining': None,
+      'yellow_ink_status': None,
+      'yellow_toner': 10,
+      'yellow_toner_remaining': 2,
+      'yellow_toner_status': 2,
+    }),
+    'info': dict({
+      'host': 'localhost',
+      'type': 'laser',
+    }),
+  })
+# ---
diff --git a/tests/components/brother/test_diagnostics.py b/tests/components/brother/test_diagnostics.py
index ce09fe13d1a..26ed77931b4 100644
--- a/tests/components/brother/test_diagnostics.py
+++ b/tests/components/brother/test_diagnostics.py
@@ -3,6 +3,8 @@ from datetime import datetime
 import json
 from unittest.mock import Mock, patch
 
+from syrupy import SnapshotAssertion
+
 from homeassistant.core import HomeAssistant
 from homeassistant.util.dt import UTC
 
@@ -14,12 +16,13 @@ from tests.typing import ClientSessionGenerator
 
 
 async def test_entry_diagnostics(
-    hass: HomeAssistant, hass_client: ClientSessionGenerator
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
 ) -> None:
     """Test config entry diagnostics."""
     entry = await init_integration(hass, skip_setup=True)
 
-    diagnostics_data = json.loads(load_fixture("diagnostics_data.json", "brother"))
     test_time = datetime(2019, 11, 11, 9, 10, 32, tzinfo=UTC)
     with patch("brother.Brother.initialize"), patch(
         "brother.datetime", now=Mock(return_value=test_time)
@@ -32,5 +35,4 @@ async def test_entry_diagnostics(
 
     result = await get_diagnostics_for_config_entry(hass, hass_client, entry)
 
-    assert result["info"] == {"host": "localhost", "type": "laser"}
-    assert result["data"] == diagnostics_data
+    assert result == snapshot