diff --git a/tests/test_plain_dca_dependency.py b/tests/test_plain_dca_dependency.py
index 0073fcf..464682f 100644
--- a/tests/test_plain_dca_dependency.py
+++ b/tests/test_plain_dca_dependency.py
@@ -80,16 +80,19 @@ def test_installed_api_preserves_final_tranche_and_preview_only(installed_dca_ca
     assert evaluate_dca_period(**installed_dca_case) == result
 
 
-def test_adapter_consumes_installed_api_and_rejects_sg(installed_dca_case):
+def test_adapter_consumes_installed_api_and_rejects_sg(installed_dca_case, monkeypatch):
     from us_equity_strategies.plain_dca import evaluate_dca_period
 
     from application.plain_dca_paper_adapter import (
         PlainDcaPaperError,
         consume_plain_dca_preview,
     )
-    from application.runtime_target_manifest import load_runtime_target_manifest
+    from types import SimpleNamespace
 
-    service, = [t.service for t in load_runtime_target_manifest().targets if t.id == "paper"]
+    service = "fake-paper-service"
+    paper = SimpleNamespace(id="paper", environment="longbridge-paper", mode="paper", service=service)
+    monkeypatch.setattr("application.plain_dca_paper_adapter.load_runtime_target_manifest",
+                        lambda: SimpleNamespace(targets=(paper,)))
     now = installed_dca_case["now"]
     readback = {"observed_at": now, "valid_until": now+timedelta(minutes=1),
                     "target_id": "paper", "environment": "longbridge-paper",
diff --git a/tests/test_plain_dca_paper_adapter.py b/tests/test_plain_dca_paper_adapter.py
index 9b21859..497d534 100644
--- a/tests/test_plain_dca_paper_adapter.py
+++ b/tests/test_plain_dca_paper_adapter.py
@@ -16,6 +16,14 @@
 NOW = datetime(2026, 11, 5, tzinfo=timezone.utc)
 
 
+@pytest.fixture(autouse=True)
+def synthetic_paper_manifest(monkeypatch):
+    paper = SimpleNamespace(id="paper", environment="longbridge-paper", mode="paper",
+                            service="fake-paper-service")
+    monkeypatch.setattr("application.plain_dca_paper_adapter.load_runtime_target_manifest",
+                        lambda: SimpleNamespace(targets=(paper,)))
+
+
 @dataclass(frozen=True)
 class Preview:
     no_order: bool = True
@@ -30,11 +38,11 @@ def readback():
         "target_id": "paper", "environment": "longbridge-paper",
         "live_enabled": False, "kelly_enabled": False, "stop_loss_enabled": False,
         "protected_env": {
-            "CLOUD_RUN_SERVICE": "longbridge-quant-paper-service",
+            "CLOUD_RUN_SERVICE": "fake-paper-service",
             "RUNTIME_TARGET_ENABLED": "false", "LONGBRIDGE_DRY_RUN_ONLY": "false",
             "LONGBRIDGE_PHYSICAL_ACCOUNT_ID": "fake-paper-account",
             "RUNTIME_TARGET_JSON": json.dumps({
-                "platform_id": "longbridge", "service_name": "longbridge-quant-paper-service",
+                "platform_id": "longbridge", "service_name": "fake-paper-service",
                 "execution_environment": "paper", "dry_run_only": False,
                 "execution_mode": "live", "account_scope": "PAPER",
                 "account_selector": ["PAPER"], "deployment_selector": "PAPER",
diff --git a/tests/test_plain_dca_paper_scheduler.py b/tests/test_plain_dca_paper_scheduler.py
index 31b60ed..4fc1ed9 100644
--- a/tests/test_plain_dca_paper_scheduler.py
+++ b/tests/test_plain_dca_paper_scheduler.py
@@ -9,15 +9,22 @@
 
 from application.plain_dca_paper_adapter import PlainDcaPaperError
 from application.plain_dca_paper_scheduler import scheduled_plain_dca_preview
-from application.runtime_target_manifest import load_runtime_target_manifest
 
 pytest_plugins = ("test_plain_dca_dependency",)
 
 NOW = datetime(2026, 11, 5, tzinfo=timezone.utc)
 
 
+@pytest.fixture(autouse=True)
+def synthetic_paper_manifest(monkeypatch):
+    paper = SimpleNamespace(id="paper", environment="longbridge-paper", mode="paper",
+                            service="fake-paper-service")
+    monkeypatch.setattr("application.plain_dca_paper_adapter.load_runtime_target_manifest",
+                        lambda: SimpleNamespace(targets=(paper,)))
+
+
 def readback():
-    service, = [t.service for t in load_runtime_target_manifest().targets if t.id == "paper"]
+    service = "fake-paper-service"
     return {
         "observed_at": NOW, "valid_until": NOW+timedelta(minutes=1),
         "target_id": "paper", "environment": "longbridge-paper",