diff --git a/.github/workflows/e2e-tests.yaml b/.github/workflows/e2e-tests.yaml
index b3ef0012c..7190a00bd 100644
--- a/.github/workflows/e2e-tests.yaml
+++ b/.github/workflows/e2e-tests.yaml
@@ -13,6 +13,7 @@ jobs:
         name: Electron E2E on ${{ matrix.os }}
         runs-on: ${{ matrix.os }}
         env:
+            IPTVNATOR_ALLOW_PRIVATE_NETWORK_URLS: '1'
             NX_SKIP_NX_CACHE: true
         strategy:
             fail-fast: false
diff --git a/apps/electron-backend-e2e/src/electron-test-fixtures.ts b/apps/electron-backend-e2e/src/electron-test-fixtures.ts
index 9589992ad..62f365b24 100644
--- a/apps/electron-backend-e2e/src/electron-test-fixtures.ts
+++ b/apps/electron-backend-e2e/src/electron-test-fixtures.ts
@@ -141,6 +141,9 @@ export async function launchElectronApp(
         args,
         env: {
             ...process.env,
+            // Electron E2E uses local mock HTTP servers for playlists, portals, and EPG sources.
+            IPTVNATOR_ALLOW_PRIVATE_NETWORK_URLS:
+                process.env['IPTVNATOR_ALLOW_PRIVATE_NETWORK_URLS'] ?? '1',
             ...options.env,
             ELECTRON_IS_DEV: '0',
             IPTVNATOR_E2E_DATA_DIR: dataDir,