diff --git a/tests/integration/_support/scripted_client.py b/tests/integration/_support/scripted_client.py
deleted file mode 100644
index 9502740b1b5..00000000000
--- a/tests/integration/_support/scripted_client.py
+++ /dev/null
@@ -1,57 +0,0 @@
-"""Client for registering scenarios with the integration upstream."""
-
-from __future__ import annotations
-
-import os
-from dataclasses import dataclass
-from typing import Final
-
-import httpx
-from integration._support.scripted_wires import (
-    WIRE_MOUNTS,
-    Scenario,
-    ScenarioDeleted,
-    ScenarioRegistered,
-    Wire,
-)
-
-CONTROL_URL: Final = os.environ.get("INTEGRATION_UPSTREAM_URL", "http://127.0.0.1:8190").rstrip("/")
-
-
-@dataclass(frozen=True, slots=True)
-class ScenarioHandle:
-    scenario_id: str
-    wire: Wire
-    control_url: str
-
-    def api_base(self) -> str:
-        return f"{self.control_url}/{self.scenario_id}/{self._mount()}"
-
-    def _mount(self) -> str:
-        return WIRE_MOUNTS[self.wire]
-
-
-def register_scenario(scenario: Scenario) -> ScenarioHandle:
-    response: Final = httpx.post(
-        f"{CONTROL_URL}/__scenarios",
-        json=scenario.model_dump(mode="json"),
-        trust_env=False,
-        timeout=15,
-    )
-    response.raise_for_status()
-    result: Final = ScenarioRegistered.model_validate_json(response.content)
-    return ScenarioHandle(
-        scenario_id=result.scenario_id,
-        wire=scenario.wire,
-        control_url=CONTROL_URL,
-    )
-
-
-def delete_scenario(handle: ScenarioHandle) -> None:
-    response: Final = httpx.delete(
-        f"{CONTROL_URL}/__scenarios/{handle.scenario_id}",
-        trust_env=False,
-        timeout=15,
-    )
-    response.raise_for_status()
-    ScenarioDeleted.model_validate_json(response.content)
diff --git a/tests/integration/_support/upstream.py b/tests/integration/_support/upstream.py
index c8e77ad513a..b3e6336dcee 100644
--- a/tests/integration/_support/upstream.py
+++ b/tests/integration/_support/upstream.py
@@ -4,10 +4,12 @@ import argparse
 from collections import deque
 import json
 from dataclasses import dataclass, field
+import os
 from pathlib import Path
 from queue import SimpleQueue
 from typing import Final, cast
 
+import httpx
 import uvicorn
 from pydantic import JsonValue, TypeAdapter, ValidationError
 from starlette.applications import Starlette
@@ -16,7 +18,16 @@ from starlette.responses import JSONResponse, Response
 from starlette.routing import Route
 
 from _fake_openai_endpoint_server import chat_completions, completions, embeddings, health, moderations
-from integration._support.scripted_wires import RenderedResponse, Scenario, ScenarioStore, render
+from integration._support.scripted_wires import (
+    WIRE_MOUNTS,
+    RenderedResponse,
+    Scenario,
+    ScenarioDeleted,
+    ScenarioRegistered,
+    ScenarioStore,
+    Wire,
+    render,
+)
 
 JSON_OBJECT: Final = TypeAdapter(dict[str, JsonValue])
 INTERNAL_FIELDS: Final = frozenset(
@@ -194,6 +205,48 @@ class Provider:
         )
 
 
+CONTROL_URL: Final = os.environ.get("INTEGRATION_UPSTREAM_URL", "http://127.0.0.1:8190").rstrip("/")
+
+
+@dataclass(frozen=True, slots=True)
+class ScenarioHandle:
+    scenario_id: str
+    wire: Wire
+    control_url: str
+
+    def api_base(self) -> str:
+        return f"{self.control_url}/{self.scenario_id}/{self._mount()}"
+
+    def _mount(self) -> str:
+        return WIRE_MOUNTS[self.wire]
+
+
+def register_scenario(scenario: Scenario) -> ScenarioHandle:
+    response: Final = httpx.post(
+        f"{CONTROL_URL}/__scenarios",
+        json=scenario.model_dump(mode="json"),
+        trust_env=False,
+        timeout=15,
+    )
+    response.raise_for_status()
+    result: Final = ScenarioRegistered.model_validate_json(response.content)
+    return ScenarioHandle(
+        scenario_id=result.scenario_id,
+        wire=scenario.wire,
+        control_url=CONTROL_URL,
+    )
+
+
+def delete_scenario(handle: ScenarioHandle) -> None:
+    response: Final = httpx.delete(
+        f"{CONTROL_URL}/__scenarios/{handle.scenario_id}",
+        trust_env=False,
+        timeout=15,
+    )
+    response.raise_for_status()
+    ScenarioDeleted.model_validate_json(response.content)
+
+
 def main() -> None:
     parser: Final = argparse.ArgumentParser()
     parser.add_argument("--port", type=int, default=8190)
diff --git a/tests/integration/cost_calculation/conftest.py b/tests/integration/cost_calculation/conftest.py
index 66eb373df33..0cbc837c184 100644
--- a/tests/integration/cost_calculation/conftest.py
+++ b/tests/integration/cost_calculation/conftest.py
@@ -13,7 +13,7 @@ from pydantic import BaseModel, ConfigDict
 
 from integration._support.client import JSON_OBJECT, Scenario, eventually, object_value, string_value
 from integration._support.database import read_rows
-from integration._support.scripted_client import delete_scenario, register_scenario
+from integration._support.upstream import delete_scenario, register_scenario
 from integration.cost_calculation.cost_matrix import Case, FrontierModel