diff --git a/backend/src/__tests__/reviews.test.js b/backend/src/__tests__/reviews.test.js
index 7da8747..a37da2a 100644
--- a/backend/src/__tests__/reviews.test.js
+++ b/backend/src/__tests__/reviews.test.js
@@ -87,4 +87,72 @@ test('POST /reviews should return 409 for already reviewed deal', async () => {
   });
   
   assert.strictEqual(response.statusCode, 409);
+});
+
+test('POST /reviews should return 400 for invalid dealId', async () => {
+  const newReview = {
+    dealId: 'invalid',
+    revieweeId: 2,
+    rating: 5,
+    comment: 'Great product'
+  };
+  
+  const response = await app.inject({
+    method: 'POST',
+    url: '/reviews/invalid',
+    payload: newReview
+  });
+  
+  assert.strictEqual(response.statusCode, 400);
+});
+
+test('POST /reviews should return 400 for invalid revieweeId', async () => {
+  const newReview = {
+    dealId: 1,
+    revieweeId: -1,
+    rating: 5,
+    comment: 'Great product'
+  };
+  
+  const response = await app.inject({
+    method: 'POST',
+    url: '/reviews/1',
+    payload: newReview
+  });
+  
+  assert.strictEqual(response.statusCode, 400);
+});
+
+test('POST /reviews should return 400 for invalid rating', async () => {
+  const newReview = {
+    dealId: 1,
+    revieweeId: 2,
+    rating: 0,
+    comment: 'Great product'
+  };
+  
+  const response = await app.inject({
+    method: 'POST',
+    url: '/reviews/1',
+    payload: newReview
+  });
+  
+  assert.strictEqual(response.statusCode, 400);
+});
+
+test('POST /reviews should return 400 for invalid comment length', async () => {
+  const newReview = {
+    dealId: 1,
+    revieweeId: 2,
+    rating: 5,
+    comment: 'a'.repeat(2001)
+  };
+  
+  const response = await app.inject({
+    method: 'POST',
+    url: '/reviews/1',
+    payload: newReview
+  });
+  
+  assert.strictEqual(response.statusCode, 400);
 });
\ No newline at end of file
diff --git a/docs/runtime/pick_next_task_state.env b/docs/runtime/pick_next_task_state.env
index bd48b77..ea168ef 100644
--- a/docs/runtime/pick_next_task_state.env
+++ b/docs/runtime/pick_next_task_state.env
@@ -1,2 +1,2 @@
-LAST_ROUTE=profile.js
-UPDATED_AT=2026-03-06T20:36:17Z
+LAST_ROUTE=reviews.js
+UPDATED_AT=2026-03-06T20:37:06Z