diff --git a/src/runtime/server/utils/doGraphqlRequest.ts b/src/runtime/server/utils/doGraphqlRequest.ts
index 5f40c9c..4af895a 100644
--- a/src/runtime/server/utils/doGraphqlRequest.ts
+++ b/src/runtime/server/utils/doGraphqlRequest.ts
@@ -54,7 +54,7 @@ export async function doGraphqlRequest(
     runtimeConfig,
     serverOptions,
     event,
-    null,
+    operation,
     operationName,
     context || null,
   )
@@ -63,8 +63,8 @@ export async function doGraphqlRequest(
   const fetchOptions = await getFetchOptions(
     serverOptions,
     event,
-    null,
-    body.operationName || null,
+    operation,
+    operationName,
     context,
   )
 
diff --git a/test/runtime/serverHandler/doGraphqlRequest.test.ts b/test/runtime/serverHandler/doGraphqlRequest.test.ts
new file mode 100644
index 0000000..e2a35c2
--- /dev/null
+++ b/test/runtime/serverHandler/doGraphqlRequest.test.ts
@@ -0,0 +1,155 @@
+import type { IncomingMessage, ServerResponse } from 'node:http'
+import { describe, expect, test, vi } from 'vitest'
+import { H3Event } from 'h3'
+import { GraphqlMiddlewareOperation } from './../../../src/runtime/settings'
+
+vi.mock('#nuxt-graphql-middleware/documents', () => {
+  return {
+    documents: {
+      query: {
+        testQuery: 'query TestQuery { test }',
+      },
+      mutation: {
+        testMutation: 'mutation TestMutation { test }',
+      },
+    },
+  }
+})
+
+vi.mock('#nuxt-graphql-middleware/operation-variables', () => {
+  return {
+    operationVariables: {},
+  }
+})
+
+vi.mock('#imports', () => {
+  return {
+    useRuntimeConfig: () => {
+      return {
+        public: {
+          'nuxt-graphql-middleware': {
+            serverApiPrefix: '/nuxt-graphql-middleware',
+          },
+        },
+        graphqlMiddleware: {
+          graphqlEndpoint: 'http://localhost/graphql',
+        },
+      }
+    },
+  }
+})
+
+vi.mock('nitropack/runtime', () => {
+  return {
+    useEvent: () => null,
+  }
+})
+
+// Track what arguments serverFetchOptions and graphqlEndpoint receive.
+const serverFetchOptionsCalls: Array<{
+  operation: any
+  operationName: any
+}> = []
+
+const graphqlEndpointCalls: Array<{
+  operation: any
+  operationName: any
+}> = []
+
+vi.mock('#nuxt-graphql-middleware/server-options', () => {
+  return {
+    serverOptions: {
+      serverFetchOptions: (
+        _event: any,
+        operation: any,
+        operationName: any,
+      ) => {
+        serverFetchOptionsCalls.push({ operation, operationName })
+        return {}
+      },
+      graphqlEndpoint: (
+        _event: any,
+        operation: any,
+        operationName: any,
+      ) => {
+        graphqlEndpointCalls.push({ operation, operationName })
+        return 'http://localhost/graphql'
+      },
+    },
+  }
+})
+
+const fetchMock = {
+  raw: () =>
+    Promise.resolve({
+      _data: { data: {} },
+    }),
+}
+
+vi.stubGlobal('$fetch', fetchMock)
+
+function createEvent(): H3Event {
+  const req: Partial<IncomingMessage> = { method: 'GET', url: '/' }
+  const res: Partial<ServerResponse> = {}
+  return new H3Event(req as any, res as any)
+}
+
+describe('doGraphqlRequest', () => {
+  test('passes operation to serverFetchOptions and graphqlEndpoint for queries', async () => {
+    serverFetchOptionsCalls.length = 0
+    graphqlEndpointCalls.length = 0
+
+    const { doGraphqlRequest } = await import(
+      './../../../src/runtime/server/utils/doGraphqlRequest'
+    )
+
+    await doGraphqlRequest(
+      {
+        query: 'query TestQuery { test }',
+        variables: {},
+        operation: GraphqlMiddlewareOperation.Query,
+        operationName: 'testQuery',
+      },
+      null,
+      createEvent(),
+    )
+
+    // serverFetchOptions should receive the operation, not null.
+    expect(serverFetchOptionsCalls).toHaveLength(1)
+    expect(serverFetchOptionsCalls[0].operation).toBe('query')
+    expect(serverFetchOptionsCalls[0].operationName).toBe('testQuery')
+
+    // graphqlEndpoint should receive the operation, not null.
+    expect(graphqlEndpointCalls).toHaveLength(1)
+    expect(graphqlEndpointCalls[0].operation).toBe('query')
+    expect(graphqlEndpointCalls[0].operationName).toBe('testQuery')
+  })
+
+  test('passes operation to serverFetchOptions and graphqlEndpoint for mutations', async () => {
+    serverFetchOptionsCalls.length = 0
+    graphqlEndpointCalls.length = 0
+
+    const { doGraphqlRequest } = await import(
+      './../../../src/runtime/server/utils/doGraphqlRequest'
+    )
+
+    await doGraphqlRequest(
+      {
+        query: 'mutation TestMutation { test }',
+        variables: {},
+        operation: GraphqlMiddlewareOperation.Mutation,
+        operationName: 'testMutation',
+      },
+      null,
+      createEvent(),
+    )
+
+    expect(serverFetchOptionsCalls).toHaveLength(1)
+    expect(serverFetchOptionsCalls[0].operation).toBe('mutation')
+    expect(serverFetchOptionsCalls[0].operationName).toBe('testMutation')
+
+    expect(graphqlEndpointCalls).toHaveLength(1)
+    expect(graphqlEndpointCalls[0].operation).toBe('mutation')
+    expect(graphqlEndpointCalls[0].operationName).toBe('testMutation')
+  })
+})