[CI/Build] Fix MOSS CPU tests on ROCm workers (#8447)

Signed-off-by: andyluo7 <andy.luo@amd.com>

tests/model_executor/models/moss_tts/test_reference_encoder.py

@@ -6,6 +6,7 @@ single-flight, and micro-batched encoding."""
 import asyncio
 import threading
 import time
+from tempfile import TemporaryDirectory
 
 import pytest
 import torch
@@ -650,22 +651,25 @@ async def test_inline_index_requires_matching_resolve_key(make_encoder):
     assert audio.resolve_calls == [ref, ref]
 
 
-async def test_inline_reference_shared_across_encoders(make_encoder, tmp_path_factory, monkeypatch):
-    shared_dir = tmp_path_factory.mktemp("ref")
-    monkeypatch.setenv("VLLM_OMNI_MOSS_REF_CODES_SHARED_DIR", str(shared_dir))
-    ref = "data:audio/wav;base64,R0hJ"
-    first_audio, second_audio = _DigestAudio(), _DigestAudio()
-    first_audio.register(ref, 9)
-    second_audio.register(ref, 9)
-    first, second = make_encoder(_FakeProcessor()), make_encoder(_FakeProcessor())
+async def test_inline_reference_shared_across_encoders(make_encoder, monkeypatch):
+    # Keep the AF_UNIX socket path independent of pytest's nested base path.
+    with TemporaryDirectory(prefix="moss-ref-") as shared_dir:
+        monkeypatch.setenv("VLLM_OMNI_MOSS_REF_CODES_SHARED_DIR", shared_dir)
+        ref = "data:audio/wav;base64,R0hJ"
+        first_audio, second_audio = _DigestAudio(), _DigestAudio()
+        first_audio.register(ref, 9)
+        second_audio.register(ref, 9)
+        first, second = make_encoder(_FakeProcessor()), make_encoder(_FakeProcessor())
 
-    a, key_a = await first.encode(ref, resolve_ref_audio=first_audio.resolve, get_artifact_key=first_audio.artifact_key)
-    b, key_b = await second.encode(
-        ref, resolve_ref_audio=second_audio.resolve, get_artifact_key=second_audio.artifact_key
-    )
+        a, key_a = await first.encode(
+            ref, resolve_ref_audio=first_audio.resolve, get_artifact_key=first_audio.artifact_key
+        )
+        b, key_b = await second.encode(
+            ref, resolve_ref_audio=second_audio.resolve, get_artifact_key=second_audio.artifact_key
+        )
 
-    assert first_audio.resolve_calls == [ref] and second_audio.resolve_calls == []
-    assert key_a == key_b and torch.equal(a, b)
+        assert first_audio.resolve_calls == [ref] and second_audio.resolve_calls == []
+        assert key_a == key_b and torch.equal(a, b)
 
 
 # --------------------------------------------------------------------------- #

tests/model_executor/models/moss_tts/test_shared_reference_encoder.py

@@ -3,6 +3,7 @@
 """API processes share one reference encoder through a Unix socket."""
 
 import threading
+from tempfile import TemporaryDirectory
 
 import pytest
 import torch
@@ -30,10 +31,11 @@ class _Recorder:
 
 
 @pytest.fixture
-def host_dir(tmp_path_factory, monkeypatch):
+def host_dir(monkeypatch):
     monkeypatch.setattr(shared, "_host_lock_handle", None)
     # AF_UNIX limits the full socket path, including pytest directory names.
-    return str(tmp_path_factory.mktemp("ref"))
+    with TemporaryDirectory(prefix="moss-ref-") as path:
+        yield path
 
 
 def test_only_one_process_per_directory_hosts(host_dir):