diff --git a/test_runner/regress/test_lfc_prewarm.py b/test_runner/regress/test_lfc_prewarm.py
index f464d1ab9e..b92e60932a 100644
--- a/test_runner/regress/test_lfc_prewarm.py
+++ b/test_runner/regress/test_lfc_prewarm.py
@@ -13,6 +13,7 @@ def test_lfc_prewarm(neon_simple_env: NeonEnv):
         config_lines=[
             "autovacuum = off",
             "shared_buffers=1MB",
+            "neon.file_cache_path='file.cache'",
             "neon.max_file_cache_size=1GB",
             "neon.file_cache_size_limit=1GB",
             "neon.file_cache_prewarm_limit=1000",