diff --git a/tests/entrypoints/unit_tests/test_remote_vllm_server.py b/tests/entrypoints/unit_tests/test_remote_vllm_server.py
index 7f22746c88..c86b07a5cf 100644
--- a/tests/entrypoints/unit_tests/test_remote_vllm_server.py
+++ b/tests/entrypoints/unit_tests/test_remote_vllm_server.py
@@ -6,7 +6,69 @@ from unittest.mock import Mock
 import pytest
 
 import tests.utils as test_utils
-from tests.utils import RemoteOpenAIServer
+from tests.utils import RemoteLaunchRenderServer, RemoteOpenAIServer
+
+
+@pytest.mark.parametrize(
+    ("args", "expected"),
+    [
+        (["--api-key", "key1", "key2"], ["--api-key", "***", "***"]),
+        (["--api_key", "key1", "key2"], ["--api_key", "***", "***"]),
+        (["--api-key=key1", "key2"], ["--api-key=***", "***"]),
+        (["--api_key=key1", "key2"], ["--api_key=***", "***"]),
+        (["--hf-token", "token"], ["--hf-token", "***"]),
+        (["--hf_token", "token"], ["--hf_token", "***"]),
+        (["--hf-token=token"], ["--hf-token=***"]),
+        (["--hf_token=token"], ["--hf_token=***"]),
+    ],
+)
+def test_redact_sensitive_cli_arg_variants(args: list[str], expected: list[str]):
+    assert test_utils._redact_sensitive_cli_args(args) == expected
+
+
+@pytest.mark.parametrize(
+    ("server_cls", "command"),
+    [
+        (RemoteOpenAIServer, ["vllm", "serve"]),
+        (RemoteLaunchRenderServer, ["vllm", "launch", "render"]),
+    ],
+)
+def test_server_redacts_sensitive_values(
+    server_cls,
+    command: list[str],
+    monkeypatch: pytest.MonkeyPatch,
+    capsys: pytest.CaptureFixture[str],
+):
+    server = object.__new__(server_cls)
+    popen = Mock()
+    monkeypatch.setattr(test_utils.subprocess, "Popen", popen)
+    monkeypatch.setenv("INHERITED_SECRET", "inherited-secret")
+    serve_args = [
+        "--api_key",
+        "api-secret-1",
+        "api-secret-2",
+        "--hf-token=hf-secret",
+        "--max-num-seqs",
+        "2",
+    ]
+
+    server._start_server(
+        "test-model", serve_args, {"OVERRIDE_SECRET": "override-secret"}
+    )
+
+    stdout = capsys.readouterr().out
+    assert "api-secret-1" not in stdout
+    assert "api-secret-2" not in stdout
+    assert "hf-secret" not in stdout
+    assert "inherited-secret" not in stdout
+    assert "override-secret" not in stdout
+    assert "--api_key *** ***" in stdout
+    assert "--hf-token=***" in stdout
+    assert "--max-num-seqs 2" in stdout
+    assert popen.call_args.args[0] == [*command, "test-model", *serve_args]
+    child_env = popen.call_args.kwargs["env"]
+    assert child_env["INHERITED_SECRET"] == "inherited-secret"
+    assert child_env["OVERRIDE_SECRET"] == "override-secret"
 
 
 def test_openai_server_shutdown_wait_covers_engine_cleanup(
diff --git a/tests/utils.py b/tests/utils.py
index 0dd86a75af..0c2cfeb6a0 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -147,6 +147,28 @@ ROCM_ENGINE_KWARGS: dict = (
 _TILELANG_TVM_PYTHONPATH_FRAGMENT = os.path.join(
     "tilelang", "3rdparty", "tvm", "python"
 )
+_SENSITIVE_CLI_ARG_NARGS = {"--api-key": "+", "--hf-token": "?"}
+
+
+def _redact_sensitive_cli_args(args: Sequence[str]) -> list[str]:
+    redacted_args = list(args)
+    index = 0
+    while index < len(args):
+        name, separator, _ = args[index].partition("=")
+        nargs = _SENSITIVE_CLI_ARG_NARGS.get(name.replace("_", "-"))
+        if nargs is None:
+            index += 1
+            continue
+        if separator:
+            redacted_args[index] = f"{name}=***"
+        index += 1
+        if not separator or nargs == "+":
+            while index < len(args) and not args[index].startswith("-"):
+                redacted_args[index] = "***"
+                index += 1
+                if nargs == "?":
+                    break
+    return redacted_args
 
 
 def _sanitize_pythonpath_value(pythonpath: str | None) -> str:
@@ -784,8 +806,8 @@ class RemoteOpenAIServer(RemoteVLLMServer):
             env.update(env_dict)
         _sanitize_pythonpath_env(env)
         serve_cmd = ["vllm", "serve", model, *vllm_serve_args]
-        print(f"Launching RemoteOpenAIServer with: {' '.join(serve_cmd)}")
-        print(f"Environment variables: {env}")
+        redacted_serve_cmd = _redact_sensitive_cli_args(serve_cmd)
+        print(f"Launching RemoteOpenAIServer with: {' '.join(redacted_serve_cmd)}")
         self.proc: subprocess.Popen = subprocess.Popen(
             serve_cmd,
             env=env,
@@ -812,7 +834,10 @@ class RemoteLaunchRenderServer(RemoteVLLMServer):
             env.update(env_dict)
         _sanitize_pythonpath_env(env)
         serve_cmd = ["vllm", "launch", "render", model, *vllm_serve_args]
-        print(f"Launching RemoteLaunchRenderServer with: {' '.join(serve_cmd)}")
+        redacted_serve_cmd = _redact_sensitive_cli_args(serve_cmd)
+        print(
+            f"Launching RemoteLaunchRenderServer with: {' '.join(redacted_serve_cmd)}"
+        )
         self.proc: subprocess.Popen = subprocess.Popen(
             serve_cmd,
             env=env,