diff --git a/extensions/diagnostics-otel/src/service.otlp-export.test.ts b/extensions/diagnostics-otel/src/service.otlp-export.test.ts
index 91c6bce21ae6..b213797d1273 100644
--- a/extensions/diagnostics-otel/src/service.otlp-export.test.ts
+++ b/extensions/diagnostics-otel/src/service.otlp-export.test.ts
@@ -33,10 +33,8 @@ import {
   waitForDiagnosticEventsDrained,
 } from "openclaw/plugin-sdk/diagnostic-runtime";
 import { afterEach, beforeEach, expect, test, vi } from "vitest";
-import {
-  runModelCallAndCaptureTraceparent,
-  startLocalOtlpReceiver,
-} from "../../../test/e2e/qa-lab/runtime/otel-test-support.js";
+import { runModelCallAndCaptureTraceparent } from "../../../test/e2e/qa-lab/runtime/otel-model-call.test-support.js";
+import { startLocalOtlpReceiver } from "../../../test/e2e/qa-lab/runtime/otel-test-support.js";
 import { createDiagnosticsOtelService } from "./service.js";
 import {
   createOtelContext,
diff --git a/test/e2e/qa-lab/runtime/otel-model-call.test-support.ts b/test/e2e/qa-lab/runtime/otel-model-call.test-support.ts
new file mode 100644
index 000000000000..38d6370a907a
--- /dev/null
+++ b/test/e2e/qa-lab/runtime/otel-model-call.test-support.ts
@@ -0,0 +1,33 @@
+import type { StreamFn } from "openclaw/plugin-sdk/agent-core";
+import type { DiagnosticTraceContext } from "openclaw/plugin-sdk/diagnostic-runtime";
+import { wrapStreamFnWithDiagnosticModelCallEvents } from "../../../../src/agents/embedded-agent-runner/run/attempt.model-diagnostic-events.js";
+
+export function runModelCallAndCaptureTraceparent(params: {
+  trace: DiagnosticTraceContext;
+  runId: string;
+  callId: string;
+  provider: string;
+  model: string;
+}): string | undefined {
+  let outboundTraceparent: string | undefined;
+  const wrapped = wrapStreamFnWithDiagnosticModelCallEvents(
+    ((
+      _model: Parameters<StreamFn>[0],
+      _context: Parameters<StreamFn>[1],
+      options: Parameters<StreamFn>[2],
+    ) => {
+      outboundTraceparent = options?.headers?.traceparent;
+      return undefined as never;
+    }) as StreamFn,
+    {
+      runId: params.runId,
+      provider: params.provider,
+      model: params.model,
+      trace: params.trace,
+      nextCallId: () => params.callId,
+      suppressPluginHooks: true,
+    },
+  );
+  void wrapped({} as never, {} as never);
+  return outboundTraceparent;
+}
diff --git a/test/e2e/qa-lab/runtime/otel-test-support.ts b/test/e2e/qa-lab/runtime/otel-test-support.ts
index 4bc834a1e713..f20edb2838d2 100644
--- a/test/e2e/qa-lab/runtime/otel-test-support.ts
+++ b/test/e2e/qa-lab/runtime/otel-test-support.ts
@@ -1,9 +1,6 @@
 import { createServer, type IncomingMessage, type ServerResponse } from "node:http";
 import { Socket } from "node:net";
 import { gunzipSync } from "node:zlib";
-import type { StreamFn } from "openclaw/plugin-sdk/agent-core";
-import type { DiagnosticTraceContext } from "openclaw/plugin-sdk/diagnostic-runtime";
-import { wrapStreamFnWithDiagnosticModelCallEvents } from "../../../../src/agents/embedded-agent-runner/run/attempt.model-diagnostic-events.js";
 
 export type OtlpSignal = "logs" | "metrics" | "traces";
 
@@ -116,36 +113,6 @@ export function createRecentTraceSummary() {
   };
 }
 
-export function runModelCallAndCaptureTraceparent(params: {
-  trace: DiagnosticTraceContext;
-  runId: string;
-  callId: string;
-  provider: string;
-  model: string;
-}): string | undefined {
-  let outboundTraceparent: string | undefined;
-  const wrapped = wrapStreamFnWithDiagnosticModelCallEvents(
-    ((
-      _model: Parameters<StreamFn>[0],
-      _context: Parameters<StreamFn>[1],
-      options: Parameters<StreamFn>[2],
-    ) => {
-      outboundTraceparent = options?.headers?.traceparent;
-      return undefined as never;
-    }) as StreamFn,
-    {
-      runId: params.runId,
-      provider: params.provider,
-      model: params.model,
-      trace: params.trace,
-      nextCallId: () => params.callId,
-      suppressPluginHooks: true,
-    },
-  );
-  void wrapped({} as never, {} as never);
-  return outboundTraceparent;
-}
-
 const OTLP_SIGNAL_PATHS = new Map<string, OtlpSignal>([
   ["/v1/traces", "traces"],
   ["/v1/metrics", "metrics"],