diff --git a/plugins/search/src/events/fetchSuggestions.js b/plugins/search/src/events/fetchSuggestions.js
index b734ba83..074271f2 100755
--- a/plugins/search/src/events/fetchSuggestions.js
+++ b/plugins/search/src/events/fetchSuggestions.js
@@ -2,6 +2,8 @@
 
 export const sanitiseQuery = (value) => value.replace(/[^a-zA-Z0-9\s\-.,]/g, '').trim()
 
+const toRequest = ({ url, options }) => new Request(url, options)
+
 const getRequestConfig = async (ds, query, transformRequest) => {
   const defaultRequest = {
     url: ds.urlTemplate?.replace('{query}', encodeURIComponent(query)),
@@ -9,15 +11,14 @@ const getRequestConfig = async (ds, query, transformRequest) => {
   }
 
   if (ds.buildRequest) {
-    return ds.buildRequest(query, () => defaultRequest)
+    return toRequest(ds.buildRequest(query, () => defaultRequest))
   }
 
   if (transformRequest) {
-    const transformedRequest = await transformRequest(defaultRequest, query)
-    return transformedRequest
+    return toRequest(await transformRequest(defaultRequest, query))
   }
 
-  return defaultRequest
+  return toRequest(defaultRequest)
 }
 
 /**
diff --git a/plugins/search/src/events/fetchSuggestions.test.js b/plugins/search/src/events/fetchSuggestions.test.js
index 9132b65a..1cd3fb78 100644
--- a/plugins/search/src/events/fetchSuggestions.test.js
+++ b/plugins/search/src/events/fetchSuggestions.test.js
@@ -9,6 +9,7 @@ describe('fetchSuggestions', () => {
   beforeEach(() => {
     dispatch.mockClear()
     global.fetch = jest.fn()
+    global.Request = jest.fn((url, options) => ({ url, ...options }))
     jest.spyOn(console, 'error').mockImplementation(() => {})
   })
 
@@ -35,7 +36,7 @@ describe('fetchSuggestions', () => {
 
     const result = await fetchSuggestions('test', datasets, dispatch)
 
-    expect(fetch).toHaveBeenCalledWith({ url: '/api?q=test', options: { method: 'GET' } })
+    expect(fetch).toHaveBeenCalledWith(expect.objectContaining({ url: '/api?q=test', method: 'GET' }))
     expect(result.results).toEqual(['a', 'b'])
     expect(dispatch).toHaveBeenCalledWith({
       type: 'UPDATE_SUGGESTIONS',
@@ -77,7 +78,7 @@ describe('fetchSuggestions', () => {
 
     const result = await fetchSuggestions('abc', datasets, dispatch)
 
-    expect(fetch).toHaveBeenCalledWith({ url: '/custom/abc', options: { method: 'POST' } })
+    expect(fetch).toHaveBeenCalledWith(expect.objectContaining({ url: '/custom/abc', method: 'POST' }))
     expect(result.results).toEqual(['y'])
   })
 
@@ -101,7 +102,7 @@ describe('fetchSuggestions', () => {
 
     await fetchSuggestions('x', datasets, dispatch, transformRequest)
 
-    expect(fetch).toHaveBeenCalledWith({ url: '/t?q=x', options: { method: 'PUT' } })
+    expect(fetch).toHaveBeenCalledWith(expect.objectContaining({ url: '/t?q=x', method: 'PUT' }))
   })
 
   test('handles fetch HTTP error', async () => {
@@ -206,7 +207,7 @@ describe('fetchSuggestions', () => {
 
     const result = await fetchSuggestions('hi', datasets, dispatch)
 
-    expect(fetch).toHaveBeenCalledWith({ url: '/default?q=hi', options: { method: 'GET' } })
+    expect(fetch).toHaveBeenCalledWith(expect.objectContaining({ url: '/default?q=hi', method: 'GET' }))
     expect(result.results).toEqual(['ok'])
   })
 })