diff --git a/front/src/services/people/__tests__/update.test.ts b/front/src/services/people/__tests__/update.test.ts
index f528fa169..2692ba1c3 100644
--- a/front/src/services/people/__tests__/update.test.ts
+++ b/front/src/services/people/__tests__/update.test.ts
@@ -1,54 +1,46 @@
-import { createMockClient, RequestHandlerResponse } from 'mock-apollo-client';
-import { UPDATE_PERSON, updatePerson } from '../update';
-import { GraphqlQueryPerson } from '../../../interfaces/person.interface';
+import {
+  GraphqlMutationPerson,
+  GraphqlQueryPerson,
+} from '../../../interfaces/person.interface';
+import { updatePerson } from '../update';
 
-const mockClient = createMockClient();
-
-const PERSON_RESULT = {
-  city: 'San Francisco',
-  company: {
-    company_domain: 'example.com',
-    company_name: 'ACME',
-    id: 1,
-    __typename: 'Company',
-  },
-  email: 'john@example.com',
-  firstname: 'John',
-  id: 1,
-  lastname: 'Doe',
-  phone: '+1 (555) 123-4567',
-  __typename: 'Person',
-  created_at: 'today',
-};
-
-mockClient.setRequestHandler(UPDATE_PERSON, () => {
-  return new Promise<RequestHandlerResponse<GraphqlQueryPerson>>((resolve) =>
-    resolve({ data: PERSON_RESULT }),
+jest.mock('../../../apollo', () => {
+  const personInterface = jest.requireActual(
+    '../../../interfaces/person.interface',
   );
+  return {
+    apiClient: {
+      mutate: (arg: {
+        mutation: unknown;
+        variables: GraphqlMutationPerson;
+      }) => {
+        const gqlPerson = arg.variables as unknown as GraphqlQueryPerson;
+        return { data: personInterface.mapPerson(gqlPerson) };
+      },
+    },
+  };
 });
 
 it('updates a person', async () => {
-  const result = await updatePerson(
-    {
-      fullName: 'John Doe',
-      id: 1,
-      email: 'john@example.com',
-      company: {
-        id: 2,
-        name: 'ACME',
-        domain: 'example.com',
-      },
-      phone: '+1 (555) 123-4567',
-      pipe: {
-        id: 3,
-        name: 'Customer',
-        icon: '!',
-      },
-      creationDate: new Date(),
-      city: 'San Francisco',
-      countryCode: 'US',
+  const result = await updatePerson({
+    fullName: 'John Doe',
+    id: 1,
+    email: 'john@example.com',
+    company: {
+      id: 2,
+      name: 'ACME',
+      domain: 'example.com',
     },
-    mockClient,
-  );
-  expect(result.data.email).toBe('john@example.com');
+    phone: '+1 (555) 123-4567',
+    pipe: {
+      id: 3,
+      name: 'Customer',
+      icon: '!',
+    },
+    creationDate: new Date(),
+    city: 'San Francisco',
+    countryCode: 'US',
+  });
+  expect(result.data).toBeDefined();
+  result.data && expect(result.data.email).toBe('john@example.com');
 });
diff --git a/front/src/services/people/update.ts b/front/src/services/people/update.ts
index 74fe50bf0..1b295afa7 100644
--- a/front/src/services/people/update.ts
+++ b/front/src/services/people/update.ts
@@ -1,4 +1,4 @@
-import { ApolloClient, NormalizedCacheObject, gql } from '@apollo/client';
+import { FetchResult, gql } from '@apollo/client';
 import { Person, mapGqlPerson } from '../../interfaces/person.interface';
 import { apiClient } from '../../apollo';
 
@@ -43,9 +43,8 @@ export const UPDATE_PERSON = gql`
 
 export async function updatePerson(
   person: Person,
-  client: ApolloClient<NormalizedCacheObject> = apiClient,
-) {
-  const result = await client.mutate({
+): Promise<FetchResult<Person>> {
+  const result = await apiClient.mutate({
     mutation: UPDATE_PERSON,
     variables: mapGqlPerson(person),
   });