diff --git a/yunke-server/tests/test_config.py b/yunke-server/tests/test_config.py
index 09f3584..006cde9 100644
--- a/yunke-server/tests/test_config.py
+++ b/yunke-server/tests/test_config.py
@@ -79,9 +79,9 @@ def test_stealth_defaults_are_conservative():
     jittered defaults declared here.
     """
     f = Settings.model_fields
-    assert f["request_min_interval"].default == 1.0
-    assert f["request_jitter"].default == 0.8
-    assert f["max_requests_per_run"].default == 0
-    assert f["risk_backoff_base"].default == 2.0
-    assert f["risk_backoff_max"].default == 60.0
-    assert f["risk_backoff_attempts"].default == 4
+    assert f["request_min_interval"].default == 2.0
+    assert f["request_jitter"].default == 2.5
+    assert f["max_requests_per_run"].default == 300
+    assert f["risk_backoff_base"].default == 5.0
+    assert f["risk_backoff_max"].default == 120.0
+    assert f["risk_backoff_attempts"].default == 6
diff --git a/yunke-server/tests/test_yunke_client_stealth.py b/yunke-server/tests/test_yunke_client_stealth.py
index f5e3434..085a726 100644
--- a/yunke-server/tests/test_yunke_client_stealth.py
+++ b/yunke-server/tests/test_yunke_client_stealth.py
@@ -43,8 +43,8 @@ UA = (
 )
 SEC_CH_UA = '"Not;A=Brand";v="8", "Chromium";v="150", "Google Chrome";v="150"'
 
-# Backoff schedule uses base=2.0 so expected delays are 2.0, 4.0, 8.0, ...
-BACKOFF_BASE = 2.0
+# Backoff schedule uses base=5.0 so expected delays are 5.0, 10.0, 20.0, ...
+BACKOFF_BASE = 5.0
 
 # A real RSA keypair backing the mocked ``getSecureKey`` endpoint so the real
 # RSA step in ``pc_login`` has a valid key to encrypt against (mirrors the
@@ -179,8 +179,8 @@ async def test_429_triggers_backoff_retry_then_success(
     assert resp.json() == {"data": [{"id": 1}]}
     # Initial try + two retries after backoff.
     assert route.call_count == 3
-    # base * 2**0 = 2.0, base * 2**1 = 4.0
-    assert delays == [2.0, 4.0]
+    # base * 2**0 = 5.0, base * 2**1 = 10.0
+    assert delays == [5.0, 10.0]
 
 
 @respx.mock
@@ -225,7 +225,7 @@ async def test_persistent_429_raises_after_backoff_attempts(monkeypatch):
         with pytest.raises(httpx.HTTPStatusError):
             await c.post(DATA_PATH, json={})
         # 1 initial attempt + 2 retries = 3 upstream calls, 2 backoff sleeps.
-        assert delays == [2.0, 4.0]
+        assert delays == [5.0, 10.0]
     finally:
         await c.aclose()