diff --git a/tests/e2e/test_wildcard_partial_prefix_expansion.py b/tests/e2e/test_wildcard_partial_prefix_expansion.py
index 48b265c2c62..dbe85028e10 100644
--- a/tests/e2e/test_wildcard_partial_prefix_expansion.py
+++ b/tests/e2e/test_wildcard_partial_prefix_expansion.py
@@ -75,6 +75,7 @@ def wildcard_proxy(tmp_path_factory: pytest.TempPathFactory) -> Generator[str]:
     proc = subprocess.Popen(
         [
             sys.executable,
+            "-P",
             str(REPO_ROOT / "litellm/proxy/proxy_cli.py"),
             "--config",
             str(config_path),