diff --git a/lib/instrumentation/index.spec.ts b/lib/instrumentation/index.spec.ts
index b3a68eea589..510cd376fd7 100644
--- a/lib/instrumentation/index.spec.ts
+++ b/lib/instrumentation/index.spec.ts
@@ -1,6 +1,7 @@
 import { ProxyTracerProvider } from '@opentelemetry/api';
 import * as api from '@opentelemetry/api';
 import { NodeTracerProvider } from '@opentelemetry/sdk-trace-node';
+import type { Response, SimpleGit } from 'simple-git';
 import {
   disableInstrumentations,
   getTracerProvider,
@@ -148,5 +149,31 @@ describe('instrumentation/index', () => {
         }),
       ).rejects.toThrow(error);
     });
+
+    describe('should return result for async fn with intersection type of Promise', async () => {
+      const simpleGitMock = {
+        status: vi.fn(),
+      } as Partial<SimpleGit>;
+
+      const value = 'testResult';
+
+      it('when promise is first type', async () => {
+        const promise = Promise.resolve(value);
+        // this copies `simpleGitMock` properties onto `promise`
+        const prom = Object.assign(promise, simpleGitMock) as Response<string>;
+
+        const result = await instrument('test', () => prom);
+        expect(result).toStrictEqual(value);
+      });
+
+      it('when promise is second type', async () => {
+        const promise = Promise.resolve(value);
+        // this copies `promise` properties onto `simpleGitMock`
+        const prom = Object.assign(simpleGitMock, promise) as Response<string>;
+
+        const result = await instrument('test', () => prom);
+        expect(result).toStrictEqual(value);
+      });
+    });
   });
 });
diff --git a/lib/instrumentation/index.ts b/lib/instrumentation/index.ts
index f68d7d55b45..17a7720dcec 100644
--- a/lib/instrumentation/index.ts
+++ b/lib/instrumentation/index.ts
@@ -39,6 +39,7 @@ import {
   ATTR_SERVICE_NAME,
   ATTR_SERVICE_VERSION,
 } from '@opentelemetry/semantic-conventions';
+import { isPromise } from '@sindresorhus/is';
 import { pkg } from '../expose.cjs';
 import { getEnv } from '../util/env';
 import type { RenovateSpanOptions } from './types';
@@ -182,7 +183,7 @@ export function instrument<F extends () => ReturnType<F>>(
   return getTracer().startActiveSpan(name, options, context, (span: Span) => {
     try {
       const ret = fn();
-      if (ret instanceof Promise) {
+      if (isPromise(ret)) {
         return ret
           .catch((e) => {
             span.recordException(e);