diff --git a/addons/base_automation/static/tests/base_automation_error_dialog.js b/addons/base_automation/static/tests/base_automation_error_dialog.js
index 5f96ea5d384..31a4643f245 100644
--- a/addons/base_automation/static/tests/base_automation_error_dialog.js
+++ b/addons/base_automation/static/tests/base_automation_error_dialog.js
@@ -1,20 +1,23 @@
 /** @odoo-modules */
 
-import { browser } from "@web/core/browser/browser";
-import { registry } from "@web/core/registry";
-import { errorService } from "@web/core/errors/error_service";
-import { dialogService } from "@web/core/dialog/dialog_service";
-import { MainComponentsContainer } from "@web/core/main_components_container";
-import { notificationService } from "@web/core/notifications/notification_service";
-import { uiService } from "@web/core/ui/ui_service";
-import { hotkeyService } from "@web/core/hotkeys/hotkey_service";
 import { registerCleanup } from "@web/../tests/helpers/cleanup";
 import { makeTestEnv } from "@web/../tests/helpers/mock_env";
-import { makeFakeRPCService, makeFakeLocalizationService } from "@web/../tests/helpers/mock_services";
-import { RPCError } from "@web/core/network/rpc_service";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
+import {
+    makeFakeLocalizationService,
+    makeFakeRPCService,
+} from "@web/../tests/helpers/mock_services";
+import { browser } from "@web/core/browser/browser";
+import { dialogService } from "@web/core/dialog/dialog_service";
+import { errorService } from "@web/core/errors/error_service";
+import { hotkeyService } from "@web/core/hotkeys/hotkey_service";
+import { MainComponentsContainer } from "@web/core/main_components_container";
+import { notificationService } from "@web/core/notifications/notification_service";
+import { registry } from "@web/core/registry";
+import { uiService } from "@web/core/ui/ui_service";
 
+import { getFixture, mount, nextTick, patchWithCleanup } from "@web/../tests/helpers/utils";
 import { BaseAutomationErrorDialog } from "../src/js/base_automation_error_dialog";
-import { patchWithCleanup,getFixture, mount, nextTick } from "@web/../tests/helpers/utils";
 
 const { toRaw } = owl;
 
@@ -23,7 +26,6 @@ const serviceRegistry = registry.category("services");
 let target;
 
 QUnit.module("base_automation", {}, function () {
-
     let unhandledRejectionCb;
     QUnit.module("Error Dialog", {
         async beforeEach() {
@@ -55,7 +57,6 @@ QUnit.module("base_automation", {}, function () {
     QUnit.test("Error due to an automated action", async function (assert) {
         assert.expect(4);
 
-        const error = new RPCError();
         const errorContext = {
             exception_class: "base_automation",
             base_automation: {
@@ -63,14 +64,11 @@ QUnit.module("base_automation", {}, function () {
                 name: "Test base automation error dialog",
             },
         };
-        Object.assign(error, {
+
+        const error = makeServerError({
             subType: "Odoo Client Error",
             message: "Message",
-            data: {
-                debug: "Traceback",
-                context: errorContext,
-            },
-            exceptionName: errorContext.exception_class,
+            context: errorContext,
         });
 
         patchWithCleanup(BaseAutomationErrorDialog.prototype, {
@@ -99,21 +97,17 @@ QUnit.module("base_automation", {}, function () {
         });
         await unhandledRejectionCb(errorEvent);
         await nextTick();
-        assert.containsOnce(target, '.modal .fa-clipboard');
-        assert.containsOnce(target, '.modal .o_disable_action_button');
-        assert.containsOnce(target, '.modal .o_edit_action_button');
+        assert.containsOnce(target, ".modal .fa-clipboard");
+        assert.containsOnce(target, ".modal .o_disable_action_button");
+        assert.containsOnce(target, ".modal .o_edit_action_button");
     });
 
     QUnit.test("Error not due to an automated action", async function (assert) {
         assert.expect(3);
 
-        const error = new RPCError();
-        Object.assign(error, {
+        const error = makeServerError({
             subType: "Odoo Client Error",
             message: "Message",
-            data: {
-                debug: "Traceback",
-            },
         });
 
         const env = await makeTestEnv();
@@ -131,9 +125,8 @@ QUnit.module("base_automation", {}, function () {
         });
         await unhandledRejectionCb(errorEvent);
         await nextTick();
-        assert.containsOnce(target, '.modal .fa-clipboard');
-        assert.containsNone(target, '.modal .o_disable_action_button');
-        assert.containsNone(target, '.modal .o_edit_action_button');
+        assert.containsOnce(target, ".modal .fa-clipboard");
+        assert.containsNone(target, ".modal .o_disable_action_button");
+        assert.containsNone(target, ".modal .o_edit_action_button");
     });
-
 });
diff --git a/addons/spreadsheet/static/tests/charts/model/odoo_chart_plugin_test.js b/addons/spreadsheet/static/tests/charts/model/odoo_chart_plugin_test.js
index 26e706129d7..2b17a541181 100644
--- a/addons/spreadsheet/static/tests/charts/model/odoo_chart_plugin_test.js
+++ b/addons/spreadsheet/static/tests/charts/model/odoo_chart_plugin_test.js
@@ -7,7 +7,7 @@ import { nextTick } from "@web/../tests/helpers/utils";
 import { createSpreadsheetWithChart, insertChartInSpreadsheet } from "../../utils/chart";
 import { createModelWithDataSource, waitForDataSourcesLoaded } from "../../utils/model";
 import * as spreadsheet from "@odoo/o-spreadsheet";
-import { RPCError } from "@web/core/network/rpc_service";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 
 const { toZone } = spreadsheet.helpers;
 
@@ -411,9 +411,7 @@ QUnit.module("spreadsheet > odoo chart plugin", {}, () => {
                         args.method === "web_read_group" &&
                         !hasAccessRights
                     ) {
-                        const error = new RPCError();
-                        error.data = { message: "ya done!" };
-                        throw error;
+                        throw makeServerError({ description: "ya done!" });
                     }
                 },
             });
diff --git a/addons/spreadsheet/static/tests/data_fetching/data_source_test.js b/addons/spreadsheet/static/tests/data_fetching/data_source_test.js
index 7af839011d8..9e44f3babf2 100644
--- a/addons/spreadsheet/static/tests/data_fetching/data_source_test.js
+++ b/addons/spreadsheet/static/tests/data_fetching/data_source_test.js
@@ -3,7 +3,7 @@
 import { nextTick } from "@web/../tests/helpers/utils";
 import { LoadableDataSource } from "@spreadsheet/data_sources/data_source";
 import { Deferred } from "@web/core/utils/concurrency";
-import { RPCError } from "@web/core/network/rpc_service";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 
 QUnit.module("spreadsheet data source", {}, () => {
     QUnit.test(
@@ -60,9 +60,7 @@ QUnit.module("spreadsheet data source", {}, () => {
             notify: () => {},
             orm: {
                 call: () => {
-                    const error = new RPCError();
-                    error.data = { message: "Ya done!" };
-                    throw error;
+                    throw makeServerError({ description: "Ya done!" });
                 },
             },
         });
diff --git a/addons/spreadsheet/static/tests/lists/list_plugin_test.js b/addons/spreadsheet/static/tests/lists/list_plugin_test.js
index 000d9ed7f0e..edabece18ca 100644
--- a/addons/spreadsheet/static/tests/lists/list_plugin_test.js
+++ b/addons/spreadsheet/static/tests/lists/list_plugin_test.js
@@ -2,6 +2,7 @@
 
 import { session } from "@web/session";
 import { nextTick, patchWithCleanup } from "@web/../tests/helpers/utils";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 
 import CommandResult from "@spreadsheet/o_spreadsheet/cancelled_reason";
 import { createModelWithDataSource, waitForDataSourcesLoaded } from "../utils/model";
@@ -17,7 +18,6 @@ import {
 } from "../utils/getters";
 import { createSpreadsheetWithList } from "../utils/list";
 import { registry } from "@web/core/registry";
-import { RPCError } from "@web/core/network/rpc_service";
 import { getBasicServerData } from "../utils/data";
 
 QUnit.module("spreadsheet > list plugin", {}, () => {
@@ -571,9 +571,7 @@ QUnit.module("spreadsheet > list plugin", {}, () => {
                         args.method === "search_read" &&
                         !hasAccessRights
                     ) {
-                        const error = new RPCError();
-                        error.data = { message: "ya done!" };
-                        throw error;
+                        throw makeServerError({ description: "ya done!" });
                     }
                 },
             });
diff --git a/addons/spreadsheet/static/tests/pivots/model/pivot_plugin_test.js b/addons/spreadsheet/static/tests/pivots/model/pivot_plugin_test.js
index e6a41ec2411..ba17c058e17 100644
--- a/addons/spreadsheet/static/tests/pivots/model/pivot_plugin_test.js
+++ b/addons/spreadsheet/static/tests/pivots/model/pivot_plugin_test.js
@@ -18,7 +18,7 @@ import {
 } from "@spreadsheet/../tests/utils/model";
 import { makeDeferred, nextTick, patchWithCleanup } from "@web/../tests/helpers/utils";
 import { session } from "@web/session";
-import { RPCError } from "@web/core/network/rpc_service";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 
 QUnit.module("spreadsheet > pivot plugin", {}, () => {
     QUnit.test("can select a Pivot from cell formula", async function (assert) {
@@ -763,9 +763,7 @@ QUnit.module("spreadsheet > pivot plugin", {}, () => {
                         args.method === "read_group" &&
                         !hasAccessRights
                     ) {
-                        const error = new RPCError();
-                        error.data = { message: "ya done!" };
-                        throw error;
+                        throw makeServerError({ description: "ya done!" });
                     }
                 },
             });
diff --git a/addons/survey/static/tests/components/question_page_one2many_field_tests.js b/addons/survey/static/tests/components/question_page_one2many_field_tests.js
index 775e1da3a94..93a61c227a1 100644
--- a/addons/survey/static/tests/components/question_page_one2many_field_tests.js
+++ b/addons/survey/static/tests/components/question_page_one2many_field_tests.js
@@ -2,7 +2,8 @@
 
 import { click, editInput, getFixture, nextTick, triggerHotkey } from "@web/../tests/helpers/utils";
 import { makeView, setupViewRegistries } from "@web/../tests/views/helpers";
-import { RPCError } from "@web/core/network/rpc_service";
+
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 
 QUnit.module("QuestionPageOneToManyField", (hooks) => {
     let serverData;
@@ -188,14 +189,11 @@ QUnit.module("QuestionPageOneToManyField", (hooks) => {
             mockRPC(route, args) {
                 if (args.method === "write" && args.model === "survey") {
                     assert.step("save parent form");
-                    const surveyValidationError = new RPCError();
-                    Object.assign(surveyValidationError, {
-                        exceptionName: "odoo.exceptions.ValidationError",
-                        data: {
-                            message: "This isn't right!",
-                        },
+                    throw makeServerError({
+                        description: "This isn't right!",
+                        type: "ValidationError",
                     });
-                    return Promise.reject(surveyValidationError);
+
                 }
             },
         });
diff --git a/addons/web/static/src/views/fields/relational_utils.js b/addons/web/static/src/views/fields/relational_utils.js
index ccba128d750..fdac9aa429a 100644
--- a/addons/web/static/src/views/fields/relational_utils.js
+++ b/addons/web/static/src/views/fields/relational_utils.js
@@ -278,7 +278,7 @@ export class Many2XAutocomplete extends Component {
                             const context = this.getCreationContext(request);
                             return this.openMany2X({ context });
                         }
-                        throw e;
+                        throw e.message ? e.message : e;
                     }
                 },
             });
diff --git a/addons/web/static/tests/helpers/mock_server.js b/addons/web/static/tests/helpers/mock_server.js
index c84f83943b3..f7c0574fa3a 100644
--- a/addons/web/static/tests/helpers/mock_server.js
+++ b/addons/web/static/tests/helpers/mock_server.js
@@ -16,6 +16,7 @@ import { intersection } from "@web/core/utils/arrays";
 import { deepCopy, pick } from "@web/core/utils/objects";
 import { makeFakeRPCService, makeMockFetch } from "./mock_services";
 import { patchWithCleanup } from "./utils";
+import { makeErrorFromResponse } from "@web/core/network/rpc_service";
 
 const serviceRegistry = registry.category("services");
 
@@ -104,6 +105,21 @@ function makeLogger(prefix, title) {
     return { request, response };
 }
 
+export function makeServerError({ code, context, description, message, subType, type } = {}) {
+    return makeErrorFromResponse({
+        code: code || 200,
+        message: message || "Odoo Server Error",
+        data: {
+            name: `odoo.exceptions.${type || "UserError"}`,
+            debug: "traceback",
+            arguments: [],
+            context: context || {},
+            subType,
+            message: description,
+        },
+    });
+}
+
 /**
  * @param {Element} tree
  * @param {(node: Element) => any} cb
diff --git a/addons/web/static/tests/views/fields/binary_field_tests.js b/addons/web/static/tests/views/fields/binary_field_tests.js
index 25b7758b244..6e42e2222aa 100644
--- a/addons/web/static/tests/views/fields/binary_field_tests.js
+++ b/addons/web/static/tests/views/fields/binary_field_tests.js
@@ -1,6 +1,7 @@
 /** @odoo-module **/
 
 import { registerCleanup } from "@web/../tests/helpers/cleanup";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 import { makeMockXHR } from "@web/../tests/helpers/mock_services";
 import {
     click,
@@ -12,7 +13,6 @@ import {
 } from "@web/../tests/helpers/utils";
 import { makeView, setupViewRegistries } from "@web/../tests/views/helpers";
 import { browser } from "@web/core/browser/browser";
-import { RPCError } from "@web/core/network/rpc_service";
 
 const BINARY_FILE =
     "R0lGODlhDAAMAKIFAF5LAP/zxAAAANyuAP/gaP///wAAAAAAACH5BAEAAAUALAAAAAAMAAwAAAMlWLPcGjDKFYi9lxKBOaGcF35DhWHamZUW0K4mAbiwWtuf0uxFAgA7";
@@ -482,9 +482,7 @@ QUnit.module("Fields", (hooks) => {
         serverData.models.partner.onchanges = {
             document: function (obj) {
                 if (obj.document) {
-                    const error = new RPCError();
-                    error.exceptionName = "odoo.exceptions.ValidationError";
-                    throw error;
+                    throw makeServerError({ type: "ValidationError" });
                 }
             },
         };
diff --git a/addons/web/static/tests/views/fields/many2many_tags_field_tests.js b/addons/web/static/tests/views/fields/many2many_tags_field_tests.js
index ca7ab85d064..84710067baf 100644
--- a/addons/web/static/tests/views/fields/many2many_tags_field_tests.js
+++ b/addons/web/static/tests/views/fields/many2many_tags_field_tests.js
@@ -1,8 +1,6 @@
 /** @odoo-module **/
 
-import { AutoComplete } from "@web/core/autocomplete/autocomplete";
-import { browser } from "@web/core/browser/browser";
-import { many2ManyTagsFieldColorEditable } from "@web/views/fields/many2many_tags/many2many_tags_field";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 import {
     click,
     clickDiscard,
@@ -19,8 +17,10 @@ import {
     triggerEvent,
     triggerHotkey,
 } from "@web/../tests/helpers/utils";
-import { RPCError } from "@web/core/network/rpc_service";
 import { makeView, setupViewRegistries } from "@web/../tests/views/helpers";
+import { AutoComplete } from "@web/core/autocomplete/autocomplete";
+import { browser } from "@web/core/browser/browser";
+import { many2ManyTagsFieldColorEditable } from "@web/views/fields/many2many_tags/many2many_tags_field";
 
 let serverData;
 let target;
@@ -1483,9 +1483,7 @@ QUnit.module("Fields", (hooks) => {
             arch: '<form><field name="timmy" widget="many2many_tags"/></form>',
             mockRPC(route, args) {
                 if (args.method === "name_create") {
-                    const error = new RPCError("Something went wrong");
-                    error.exceptionName = "odoo.exceptions.ValidationError";
-                    throw error;
+                    throw makeServerError({ type: "ValidationError" });
                 }
                 if (args.method === "create") {
                     assert.deepEqual(args.args[0], {
diff --git a/addons/web/static/tests/views/fields/many2one_field_tests.js b/addons/web/static/tests/views/fields/many2one_field_tests.js
index f5a7366e6d8..7bed8b46668 100644
--- a/addons/web/static/tests/views/fields/many2one_field_tests.js
+++ b/addons/web/static/tests/views/fields/many2one_field_tests.js
@@ -2,6 +2,7 @@
 
 import { registerCleanup } from "@web/../tests/helpers/cleanup";
 import { makeTestEnv } from "@web/../tests/helpers/mock_env";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 import {
     addRow,
     click,
@@ -26,15 +27,14 @@ import {
 import {
     editSearch,
     getFacetTexts,
-    toggleSearchBarMenu,
     toggleMenuItem,
+    toggleSearchBarMenu,
     validateSearch,
 } from "@web/../tests/search/helpers";
 import { makeView, makeViewInDialog, setupViewRegistries } from "@web/../tests/views/helpers";
 import { createWebClient, doAction } from "@web/../tests/webclient/helpers";
 import { browser } from "@web/core/browser/browser";
 import { errorService } from "@web/core/errors/error_service";
-import { RPCError } from "@web/core/network/rpc_service";
 import { registry } from "@web/core/registry";
 import { session } from "@web/session";
 import { Field } from "@web/views/fields/field";
@@ -3024,9 +3024,7 @@ QUnit.module("Fields", (hooks) => {
                 arch: '<form><field name="product_id" /></form>',
                 mockRPC(route, { args, method }) {
                     if (method === "name_create") {
-                        const error = new RPCError("Something went wrong");
-                        error.exceptionName = "odoo.exceptions.ValidationError";
-                        throw error;
+                        throw makeServerError({ type: "ValidationError" });
                     }
                     if (method === "create") {
                         assert.deepEqual(args[0], { name: "xyz" });
@@ -3067,7 +3065,7 @@ QUnit.module("Fields", (hooks) => {
             arch: '<form><field name="product_id" /></form>',
             mockRPC(route, { args, method }) {
                 if (method === "name_create") {
-                    return new RPCError("Something went wrong");
+                    throw makeServerError();
                 }
             },
         });
@@ -3099,9 +3097,7 @@ QUnit.module("Fields", (hooks) => {
                 arch: '<form><field name="p" /></form>',
                 mockRPC(route, { args, method }) {
                     if (method === "name_create") {
-                        const error = new RPCError("Something went wrong");
-                        error.exceptionName = "odoo.exceptions.ValidationError";
-                        throw error;
+                        throw makeServerError({ type: "ValidationError" });
                     }
                     if (method === "create") {
                         assert.deepEqual(args[0], { name: "xyz" });
diff --git a/addons/web/static/tests/views/form/form_view_tests.js b/addons/web/static/tests/views/form/form_view_tests.js
index c0c2a238156..0cf039b297e 100644
--- a/addons/web/static/tests/views/form/form_view_tests.js
+++ b/addons/web/static/tests/views/form/form_view_tests.js
@@ -2,6 +2,7 @@
 
 import { Component, EventBus, xml } from "@odoo/owl";
 import { registerCleanup } from "@web/../tests/helpers/cleanup";
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 import { makeFakeNotificationService } from "@web/../tests/helpers/mock_services";
 import {
     addRow,
@@ -32,7 +33,6 @@ import { browser } from "@web/core/browser/browser";
 import { WarningDialog } from "@web/core/errors/error_dialogs";
 import { errorService } from "@web/core/errors/error_service";
 import { localization } from "@web/core/l10n/localization";
-import { RPCError } from "@web/core/network/rpc_service";
 import { registry } from "@web/core/registry";
 import { scrollerService } from "@web/core/scroller_service";
 import { tooltipService } from "@web/core/tooltip/tooltip_service";
@@ -11470,7 +11470,7 @@ QUnit.module("Views", (hooks) => {
             mockRPC(route, { method }) {
                 if (method === "write") {
                     assert.step("write");
-                    throw new RPCError("Something went wrong");
+                    throw makeServerError();
                 }
             },
         });
@@ -12068,7 +12068,7 @@ QUnit.module("Views", (hooks) => {
             mockRPC(route, { method }) {
                 if (method === "write") {
                     assert.step("write");
-                    throw new RPCError("Something went wrong");
+                    throw makeServerError();
                 }
             },
         });
@@ -12133,7 +12133,7 @@ QUnit.module("Views", (hooks) => {
             mockRPC(route, { method }) {
                 if (method === "write") {
                     assert.step("write");
-                    throw new RPCError("Something went wrong");
+                    throw makeServerError();
                 }
             },
         });
@@ -12167,10 +12167,7 @@ QUnit.module("Views", (hooks) => {
             mockRPC(route, { method }) {
                 if (method === "create") {
                     assert.step("create");
-                    const error = new RPCError("Some business message");
-                    error.data = { context: {} };
-                    error.exceptionName = "odoo.exceptions.UserError";
-                    throw error;
+                    throw makeServerError({ message: "Some business message" });
                 }
             },
         });
@@ -13056,7 +13053,7 @@ QUnit.module("Views", (hooks) => {
         async function (assert) {
             class TestClientAction extends Component {
                 setup() {
-                    throw new RPCError("Something went wrong");
+                    throw new Error("Something went wrong");
                 }
             }
             TestClientAction.template = xml`<div></div>`;
@@ -13139,7 +13136,7 @@ QUnit.module("Views", (hooks) => {
         async function (assert) {
             class TestClientAction extends Component {
                 setup() {
-                    throw new RPCError("Something went wrong");
+                    throw new Error("Something went wrong");
                 }
             }
             TestClientAction.template = xml`<div></div>`;
diff --git a/addons/web/static/tests/views/kanban_view_tests.js b/addons/web/static/tests/views/kanban_view_tests.js
index 9f18080867d..0e3b7afa64b 100644
--- a/addons/web/static/tests/views/kanban_view_tests.js
+++ b/addons/web/static/tests/views/kanban_view_tests.js
@@ -1,5 +1,6 @@
 /** @odoo-module **/
 
+import { makeServerError } from "@web/../tests/helpers/mock_server";
 import { makeFakeDialogService } from "@web/../tests/helpers/mock_services";
 import {
     click,
@@ -19,10 +20,10 @@ import {
     triggerHotkey,
 } from "@web/../tests/helpers/utils";
 import {
-    getVisibleButtons,
     getFacetTexts,
     getPagerLimit,
     getPagerValue,
+    getVisibleButtons,
     pagerNext,
     toggleSearchBarMenu,
     validateSearch,
@@ -31,22 +32,21 @@ import { makeView, setupViewRegistries } from "@web/../tests/views/helpers";
 import { createWebClient, doAction } from "@web/../tests/webclient/helpers";
 import { browser } from "@web/core/browser/browser";
 import { dialogService } from "@web/core/dialog/dialog_service";
-import { makeErrorFromResponse, RPCError } from "@web/core/network/rpc_service";
 import { registry } from "@web/core/registry";
 import { tooltipService } from "@web/core/tooltip/tooltip_service";
 import { nbsp } from "@web/core/utils/strings";
 import { getNextTabableElement } from "@web/core/utils/ui";
 import { session } from "@web/session";
-import { AnimatedNumber } from "@web/views/view_components/animated_number";
 import { KanbanController } from "@web/views/kanban/kanban_controller";
 import { kanbanView } from "@web/views/kanban/kanban_view";
 import { DynamicRecordList } from "@web/views/relational_model";
 import { ViewButton } from "@web/views/view_button/view_button";
+import { AnimatedNumber } from "@web/views/view_components/animated_number";
 
 import { Component, onWillRender, xml } from "@odoo/owl";
-import { SampleServer } from "@web/views/sample_server";
 import { pick } from "@web/core/utils/objects";
 import { KanbanDynamicGroupList } from "@web/views/kanban/kanban_model";
+import { SampleServer } from "@web/views/sample_server";
 
 const serviceRegistry = registry.category("services");
 const viewWidgetRegistry = registry.category("view_widgets");
@@ -3746,16 +3746,7 @@ QUnit.module("Views", (hooks) => {
             groupBy: ["product_id"],
             async mockRPC(route, args) {
                 if (args.method === "name_create") {
-                    throw makeErrorFromResponse({
-                        code: 200,
-                        message: "Odoo Server Error",
-                        data: {
-                            name: "odoo.exceptions.UserError",
-                            debug: "traceback",
-                            arguments: ["This is a user error"],
-                            context: {},
-                        },
-                    });
+                    throw makeServerError({ message: "This is a user error" });
                 }
             },
         });
@@ -3801,16 +3792,7 @@ QUnit.module("Views", (hooks) => {
             groupBy: ["product_id"],
             async mockRPC(route, args) {
                 if (args.method === "name_create") {
-                    throw makeErrorFromResponse({
-                        code: 200,
-                        message: "Odoo Server Error",
-                        data: {
-                            name: "odoo.exceptions.UserError",
-                            debug: "traceback",
-                            arguments: ["This is a user error"],
-                            context: {},
-                        },
-                    });
+                    throw makeServerError({ message: "This is a user error" });
                 }
             },
         });
@@ -3848,16 +3830,7 @@ QUnit.module("Views", (hooks) => {
                 </kanban>`,
             async mockRPC(route, args) {
                 if (args.method === "name_create") {
-                    throw makeErrorFromResponse({
-                        code: 200,
-                        message: "Odoo Server Error",
-                        data: {
-                            name: "odoo.exceptions.UserError",
-                            debug: "traceback",
-                            arguments: ["This is a user error"],
-                            context: {},
-                        },
-                    });
+                    throw makeServerError({ message: "This is a user error" });
                 }
                 if (args.method === "create") {
                     assert.deepEqual(args.args[0], { foo: "blip" });
@@ -3907,16 +3880,7 @@ QUnit.module("Views", (hooks) => {
                 </kanban>`,
             async mockRPC(route, args) {
                 if (args.method === "name_create") {
-                    throw makeErrorFromResponse({
-                        code: 200,
-                        message: "Odoo Server Error",
-                        data: {
-                            name: "odoo.exceptions.UserError",
-                            debug: "traceback",
-                            arguments: ["This is a user error"],
-                            context: {},
-                        },
-                    });
+                    throw makeServerError({ message: "This is a user error" });
                 }
                 if (args.method === "create") {
                     assert.deepEqual(args.args[0], { state: "abc" });
@@ -12719,7 +12683,7 @@ QUnit.module("Views", (hooks) => {
             async mockRPC(route, { method }) {
                 assert.step(method || route);
                 if (method === "name_create") {
-                    throw new RPCError();
+                    throw makeServerError();
                 }
             },
         });
diff --git a/addons/web/static/tests/webclient/actions/window_action_tests.js b/addons/web/static/tests/webclient/actions/window_action_tests.js
index 0ef56759ca4..ebfc48a9610 100644
--- a/addons/web/static/tests/webclient/actions/window_action_tests.js
+++ b/addons/web/static/tests/webclient/actions/window_action_tests.js
@@ -1,31 +1,31 @@
 /** @odoo-module **/
 
+import { makeServerError } from "@web/../tests/helpers/mock_server";
+import { fakeCookieService, makeFakeUserService } from "@web/../tests/helpers/mock_services";
+import * as cpHelpers from "@web/../tests/search/helpers";
 import { browser } from "@web/core/browser/browser";
+import { WarningDialog } from "@web/core/errors/error_dialogs";
 import { registry } from "@web/core/registry";
+import { session } from "@web/session";
 import { editView } from "@web/views/debug_items";
-import { clearUncommittedChanges } from "@web/webclient/actions/action_service";
 import { listView } from "@web/views/list/list_view";
 import { useSetupAction } from "@web/webclient/actions/action_hook";
+import { clearUncommittedChanges } from "@web/webclient/actions/action_service";
 import testUtils from "web.test_utils";
-import { session } from "@web/session";
+import { errorService } from "../../../src/core/errors/error_service";
+import { registerCleanup } from "../../helpers/cleanup";
 import {
     click,
-    getFixture,
+    clickSave,
     editInput,
+    getFixture,
     getNodesTextContent,
     legacyExtraNextTick,
     makeDeferred,
     nextTick,
     patchWithCleanup,
-    clickSave,
 } from "../../helpers/utils";
 import { createWebClient, doAction, getActionManagerServerData, loadState } from "./../helpers";
-import { errorService } from "../../../src/core/errors/error_service";
-import { RPCError } from "@web/core/network/rpc_service";
-import { registerCleanup } from "../../helpers/cleanup";
-import { WarningDialog } from "@web/core/errors/error_dialogs";
-import { makeFakeUserService, fakeCookieService } from "@web/../tests/helpers/mock_services";
-import * as cpHelpers from "@web/../tests/search/helpers";
 
 import { onMounted } from "@odoo/owl";
 let serverData;
@@ -2181,10 +2181,7 @@ QUnit.module("ActionManager", (hooks) => {
 
         const mockRPC = (route, args) => {
             if (args.method === "onchange" && args.model === "partner") {
-                const error = new RPCError();
-                error.exceptionName = "odoo.exceptions.ValidationError";
-                error.code = 200;
-                return Promise.reject(error);
+                throw makeServerError({ type: "ValidationError" });
             }
         };