diff --git a/tests/ui/maps.spec.js b/tests/ui/maps.spec.js
index 16bcc61..615e768 100644
--- a/tests/ui/maps.spec.js
+++ b/tests/ui/maps.spec.js
@@ -100,3 +100,28 @@ test('M7: clicking map marker briefly highlights the corresponding entry card',
     // Within 500ms of click + delay, one journal-post should have is-highlighted
     await expect(page.locator('.journal-post.is-highlighted')).toBeVisible({ timeout: 1500 });
 });
+
+// ── M8: Home map has GPX journey source on active trip ────────────────────────
+test('M8: home map has a journey source after GPX settles (active trip)', async ({ page }) => {
+    // Requires travelling: true in user/config/site.yaml (set in Task 1).
+    // Requires GPX files attached to the active trip (italy-2026-demo has 7).
+    const errors = [];
+    page.on('pageerror', e => errors.push(e.message));
+
+    await page.goto('/');
+    await expect(page.locator('#home-map canvas.maplibregl-canvas')).toBeVisible({ timeout: 10000 });
+    await expect(page.locator('#home-map .maplibregl-marker').first()).toBeVisible({ timeout: 15000 });
+
+    await page.waitForFunction(function () {
+        return window.homeMap &&
+               (window.homeMap.getSource('home-journey') !== undefined ||
+                window.homeMap.getSource('home-gpx-0') !== undefined);
+    }, { timeout: 20000 });
+
+    const hasSource = await page.evaluate(function () {
+        return !!(window.homeMap.getSource('home-journey') || window.homeMap.getSource('home-gpx-0'));
+    });
+
+    expect(hasSource, 'Home map has a journey or GPX source').toBe(true);
+    expect(errors, 'No JS errors on home page').toHaveLength(0);
+});