diff --git a/tests/llm/test_rm.py b/tests/llm/test_rm.py
index fc2943c14377..6f2482e5eb86 100644
--- a/tests/llm/test_rm.py
+++ b/tests/llm/test_rm.py
@@ -33,7 +33,7 @@ class FinetuneTest(LLMTest, unittest.TestCase):
 
     def setUp(self) -> None:
         LLMTest.setUp(self)
-        sys.path.insert(0,"./llm/alignment/rm/flashmask")
+        sys.path.insert(0, "./llm/alignment/rm/flashmask")
 
     def tearDown(self) -> None:
         LLMTest.tearDown(self)