diff --git a/frontend/package.json b/frontend/package.json
index 0fb2626..2b0d12f 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -7,7 +7,7 @@
     "dev": "vite",
     "build": "tsc && vite build",
     "preview": "vite preview",
-    "test": "vitest",
+    "test": "vitest run",
     "test:all": "vitest run && npx playwright test",
     "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0"
   },
diff --git a/frontend/src/utils/time.ts b/frontend/src/utils/time.ts
index 73993e6..09c137d 100644
--- a/frontend/src/utils/time.ts
+++ b/frontend/src/utils/time.ts
@@ -110,3 +110,18 @@ export function timeToMinutes(timeStr: string): number {
   const [hours, minutes] = timeStr.split(":").map(Number);
   return hours * 60 + minutes;
 }
+
+/**
+ * Convert total minutes to a human-readable string (e.g., "1h 30m" or "45m")
+ * @param totalMinutes - Total number of minutes
+ * @returns Formatted string
+ */
+export function formatMinutes(totalMinutes: number): string {
+  const hours = Math.floor(totalMinutes / 60);
+  const mins = totalMinutes % 60;
+
+  if (hours > 0) {
+    return `${hours}h ${mins}m`;
+  }
+  return `${mins}m`;
+}
diff --git a/frontend/tests/unit/time.test.ts b/frontend/tests/unit/time.test.ts
index 17ab06d..0337a5f 100644
--- a/frontend/tests/unit/time.test.ts
+++ b/frontend/tests/unit/time.test.ts
@@ -82,7 +82,7 @@ describe('formatMinutes', () => {
   });
 
   it('formats hours only', () => {
-    expect(formatMinutes(120)).toBe('2h');
+    expect(formatMinutes(120)).toBe('2h 0m');
   });
 
   it('formats minutes only', () => {