diff --git a/tests/xpu_ci/test_ep4tp1_online.py b/tests/xpu_ci/test_ep4tp1_online.py
index 8acb5da3a..c248b24e2 100644
--- a/tests/xpu_ci/test_ep4tp1_online.py
+++ b/tests/xpu_ci/test_ep4tp1_online.py
@@ -63,6 +63,7 @@ def test_ep4tp1_online(xpu_env):
             "--tensor-parallel-size",
             "1",
             "--enable-expert-parallel",
+            "--enable-prefix-caching",
             "--data-parallel-size",
             "4",
             "--max-model-len",
diff --git a/tests/xpu_ci/test_ep4tp4_all2all.py b/tests/xpu_ci/test_ep4tp4_all2all.py
index e2fbbf227..8c5a81e0b 100644
--- a/tests/xpu_ci/test_ep4tp4_all2all.py
+++ b/tests/xpu_ci/test_ep4tp4_all2all.py
@@ -65,6 +65,7 @@ def test_ep4tp4_all2all(xpu_env):
             "--tensor-parallel-size",
             "4",
             "--enable-expert-parallel",
+            "--enable-prefix-caching",
             "--data-parallel-size",
             "1",
             "--max-model-len",
diff --git a/tests/xpu_ci/test_ep4tp4_online.py b/tests/xpu_ci/test_ep4tp4_online.py
index 3850b4efb..6f64016be 100644
--- a/tests/xpu_ci/test_ep4tp4_online.py
+++ b/tests/xpu_ci/test_ep4tp4_online.py
@@ -64,6 +64,7 @@ def test_ep4tp4_online(xpu_env):
             "--tensor-parallel-size",
             "4",
             "--enable-expert-parallel",
+            "--enable-prefix-caching",
             "--data-parallel-size",
             "1",
             "--max-model-len",