diff --git a/app/src/components/Flasher.js b/app/src/components/Flasher.js
index a5009029..f23593a4 100644
--- a/app/src/components/Flasher.js
+++ b/app/src/components/Flasher.js
@@ -35,7 +35,7 @@ export function chipFamily(description) {
 // ESP image chip_id -> family name (matches esptool-js IMAGE_CHIP_ID values).
 const ESP_CHIP_ID_NAMES = {
     0: 'ESP32', 2: 'ESP32-S2', 5: 'ESP32-C3', 9: 'ESP32-S3',
-    12: 'ESP32-C2', 13: 'ESP32-C6', 16: 'ESP32-H2', 18: 'ESP32-C5',
+    12: 'ESP32-C2', 13: 'ESP32-C6', 16: 'ESP32-H2', 17: 'ESP32-C5', 18: 'ESP32-P4',
 };
 
 // Known ESP chip names, sorted so each maps to a stable color — colors survive reboots/refreshes and only shift
diff --git a/app/src/components/Flasher.test.js b/app/src/components/Flasher.test.js
index cdb468c8..2156a57d 100644
--- a/app/src/components/Flasher.test.js
+++ b/app/src/components/Flasher.test.js
@@ -27,14 +27,13 @@ jest.mock('esptool-js', () => ({
 
 // Flasher fetches media firmware on mount; mock the API so tests don't hit the network.
 jest.mock('../api', () => ({
-    filesSearch: jest.fn().mockResolvedValue([[], 0]),
     flasherSearch: jest.fn().mockResolvedValue([[], 0]),
     getFlasherConfigs: jest.fn().mockResolvedValue([]),
     saveFlasherConfig: jest.fn().mockResolvedValue(true),
     deleteFlasherConfig: jest.fn().mockResolvedValue(true),
 }));
 
-import {filesSearch, flasherSearch, getFlasherConfigs} from '../api';
+import {flasherSearch, getFlasherConfigs} from '../api';
 import {
     chipColor,
     chipTextColor,
@@ -167,6 +166,9 @@ describe('chipIdName', () => {
         expect(chipIdName(0)).toBe('ESP32');
         expect(chipIdName(2)).toBe('ESP32-S2');
         expect(chipIdName(9)).toBe('ESP32-S3');
+        // Must match the backend ESP_CHIP_IDS map: 17 -> C5, 18 -> P4 (not the reverse).
+        expect(chipIdName(17)).toBe('ESP32-C5');
+        expect(chipIdName(18)).toBe('ESP32-P4');
     });
 
     it('falls back to a readable string for unknown ids', () => {
@@ -245,8 +247,6 @@ describe('FlasherPage', () => {
     const original = Object.getOwnPropertyDescriptor(global.navigator, 'serial');
 
     beforeEach(() => {
-        filesSearch.mockClear();
-        filesSearch.mockResolvedValue([[], 0]);
         flasherSearch.mockClear();
         flasherSearch.mockResolvedValue([[], 0]);
         getFlasherConfigs.mockClear();