diff --git a/tests/tools/test_modal_snapshot_isolation.py b/tests/tools/test_modal_snapshot_isolation.py
index b58454cc0..a04bb6507 100644
--- a/tests/tools/test_modal_snapshot_isolation.py
+++ b/tests/tools/test_modal_snapshot_isolation.py
@@ -124,8 +124,8 @@ def _install_modal_test_modules(
     sys.modules["tools.interrupt"] = types.SimpleNamespace(is_interrupted=lambda: False)
     sys.modules["tools.credential_files"] = types.SimpleNamespace(
         get_credential_file_mounts=lambda: [],
-        iter_skills_files=lambda: [],
-        iter_cache_files=lambda: [],
+        iter_skills_files=lambda **kw: [],
+        iter_cache_files=lambda **kw: [],
     )
 
     from_id_calls: list[str] = []
diff --git a/tests/tools/test_ssh_environment.py b/tests/tools/test_ssh_environment.py
index f6ee96717..383e48e29 100644
--- a/tests/tools/test_ssh_environment.py
+++ b/tests/tools/test_ssh_environment.py
@@ -121,6 +121,10 @@ class TestSSHPreflight:
             called["count"] += 1
 
         monkeypatch.setattr(ssh_env.SSHEnvironment, "_establish_connection", _fake_establish)
+        monkeypatch.setattr(ssh_env.SSHEnvironment, "_detect_remote_home", lambda self: "/home/alice")
+        monkeypatch.setattr(ssh_env.SSHEnvironment, "_ensure_remote_dirs", lambda self: None)
+        monkeypatch.setattr(ssh_env.SSHEnvironment, "init_session", lambda self: None)
+        monkeypatch.setattr(ssh_env, "FileSyncManager", lambda **kw: type("M", (), {"sync": lambda self, **k: None})())
 
         env = ssh_env.SSHEnvironment(host="example.com", user="alice")