diff --git a/python/sglang/srt/mem_cache/storage/flexkv/flexkv_radix_cache.py b/python/sglang/srt/mem_cache/storage/flexkv/flexkv_radix_cache.py
index df41c4c82..6d9f2f618 100644
--- a/python/sglang/srt/mem_cache/storage/flexkv/flexkv_radix_cache.py
+++ b/python/sglang/srt/mem_cache/storage/flexkv/flexkv_radix_cache.py
@@ -388,9 +388,9 @@ class FlexKVRadixCache(RadixCache):
             return
 
         # Compute the committed prefix mirroring LMCRadixCache's logic.
-        from sglang.srt.server_args import get_global_server_args
+        from sglang.srt.runtime_context import get_server_args
 
-        global_server_args = get_global_server_args()
+        global_server_args = get_server_args()
         topk = global_server_args.speculative_eagle_topk
         enable_kv_committed_len = topk is None or topk == 1
         if enable_kv_committed_len:
diff --git a/test/registered/unit/mem_cache/test_registry.py b/test/registered/unit/mem_cache/test_registry.py
index 84b37820f..6947b851f 100644
--- a/test/registered/unit/mem_cache/test_registry.py
+++ b/test/registered/unit/mem_cache/test_registry.py
@@ -35,6 +35,7 @@ def _make_ctx(
     server_args.radix_cache_backend = backend
     server_args.enable_streaming_session = enable_streaming
     server_args.enable_lmcache = enable_lmcache
+    server_args.enable_flexkv = False
     return TreeCacheBuildContext(
         server_args=server_args,
         params=MagicMock(),