diff --git a/frontend/vite.config.mts b/frontend/vite.config.mts
index 8f0c781a..5e946265 100644
--- a/frontend/vite.config.mts
+++ b/frontend/vite.config.mts
@@ -1,9 +1,10 @@
 import { sveltekit } from '@sveltejs/kit/vite';
+import { svelteTesting } from '@testing-library/svelte/vite';
 import { defineConfig } from 'vite';
 import path from 'path';
 
 export default defineConfig({
-  plugins: [sveltekit()],
+  plugins: [sveltekit(), svelteTesting()],
   server: {
     port: 5173,
     host: '0.0.0.0',
diff --git a/openspec/changes/headroom-foundation/tasks.md b/openspec/changes/headroom-foundation/tasks.md
index eb8c2357..e5df95cf 100644
--- a/openspec/changes/headroom-foundation/tasks.md
+++ b/openspec/changes/headroom-foundation/tasks.md
@@ -492,9 +492,9 @@
 - [x] 4.1.24 Write unit test: Redis caching for capacity (->todo)
 
 #### Component Tests (Frontend)
-- [ ] 4.1.25 Write component test: CapacityCalendar displays month (skip)
-- [ ] 4.1.26 Write component test: Availability editor toggles values (skip)
-- [ ] 4.1.27 Write component test: CapacitySummary shows totals (skip)
+- [x] 4.1.25 Write component test: CapacityCalendar displays month
+- [x] 4.1.26 Write component test: Availability editor toggles values
+- [x] 4.1.27 Write component test: CapacitySummary shows totals
 
 **Commit**: `test(capacity): Add pending tests for all planning scenarios`