diff --git a/packages/devextreme/js/__internal/scheduler/appointment_popup/form.ts b/packages/devextreme/js/__internal/scheduler/appointment_popup/form.ts
index c1dec877ebe1..0aab4de1adc5 100644
--- a/packages/devextreme/js/__internal/scheduler/appointment_popup/form.ts
+++ b/packages/devextreme/js/__internal/scheduler/appointment_popup/form.ts
@@ -24,7 +24,7 @@ import type { Properties as SwitchProperties } from '@js/ui/switch';
 import type { Properties as TextAreaProperties } from '@js/ui/text_area';
 import { current, isFluent } from '@js/ui/themes';
 import { dateSerialization } from '@ts/core/utils/m_date_serialization';
-import DropDownEditor from '@ts/ui/drop_down_editor/m_drop_down_editor';
+import DropDownEditor from '@ts/ui/drop_down_editor/drop_down_editor';
 import type Popup from '@ts/ui/popup/m_popup';
 
 import timeZoneUtils from '../m_utils_time_zone';
diff --git a/packages/devextreme/js/__internal/ui/color_box/color_box.ts b/packages/devextreme/js/__internal/ui/color_box/color_box.ts
index 30287931a576..e69250790596 100644
--- a/packages/devextreme/js/__internal/ui/color_box/color_box.ts
+++ b/packages/devextreme/js/__internal/ui/color_box/color_box.ts
@@ -5,7 +5,7 @@ import type { DeferredObj } from '@js/core/utils/deferred';
 import type { Properties } from '@js/ui/color_box';
 import type { OptionChanged } from '@ts/core/widget/types';
 import Color from '@ts/m_color';
-import DropDownEditor from '@ts/ui/drop_down_editor/m_drop_down_editor';
+import DropDownEditor from '@ts/ui/drop_down_editor/drop_down_editor';
 import type { ValueChangedEvent } from '@ts/ui/editor/editor';
 
 import type { PopupProperties } from '../popup/m_popup';
diff --git a/packages/devextreme/js/__internal/ui/date_box/date_box.base.ts b/packages/devextreme/js/__internal/ui/date_box/date_box.base.ts
index c4acfa87b06e..02aff0497b6d 100644
--- a/packages/devextreme/js/__internal/ui/date_box/date_box.base.ts
+++ b/packages/devextreme/js/__internal/ui/date_box/date_box.base.ts
@@ -21,7 +21,7 @@ import type {
 } from '@js/ui/date_box';
 import type { ToolbarItem } from '@js/ui/popup';
 import type { OptionChanged } from '@ts/core/widget/types';
-import DropDownEditor from '@ts/ui/drop_down_editor/m_drop_down_editor';
+import DropDownEditor from '@ts/ui/drop_down_editor/drop_down_editor';
 import type { ValueChangedEvent } from '@ts/ui/editor/editor';
 
 import type { PopupProperties } from '../popup/m_popup';
diff --git a/packages/devextreme/js/__internal/ui/date_box/m_date_box.strategy.list.ts b/packages/devextreme/js/__internal/ui/date_box/m_date_box.strategy.list.ts
index ca22958d6dad..99c55319dd91 100644
--- a/packages/devextreme/js/__internal/ui/date_box/m_date_box.strategy.list.ts
+++ b/packages/devextreme/js/__internal/ui/date_box/m_date_box.strategy.list.ts
@@ -7,7 +7,7 @@ import dateSerialization from '@js/core/utils/date_serialization';
 import { getHeight, getOuterHeight } from '@js/core/utils/size';
 import { isDate } from '@js/core/utils/type';
 import { getWindow } from '@js/core/utils/window';
-import { getSizeValue } from '@ts/ui/drop_down_editor/m_utils';
+import { getSizeValue } from '@ts/ui/drop_down_editor/utils';
 import List from '@ts/ui/list/list.edit.search';
 
 import type { PopupProperties } from '../popup/m_popup';
diff --git a/packages/devextreme/js/__internal/ui/date_range_box/m_date_range_box.ts b/packages/devextreme/js/__internal/ui/date_range_box/m_date_range_box.ts
index 95f2e5edf1ae..419c27fa56a0 100644
--- a/packages/devextreme/js/__internal/ui/date_range_box/m_date_range_box.ts
+++ b/packages/devextreme/js/__internal/ui/date_range_box/m_date_range_box.ts
@@ -17,7 +17,7 @@ import { each } from '@js/core/utils/iterator';
 import type { Properties } from '@js/ui/date_range_box';
 import Editor from '@js/ui/editor/editor';
 import { current, isFluent, isMaterial } from '@js/ui/themes';
-import DropDownButton from '@ts/ui/drop_down_editor/m_drop_down_button';
+import DropDownButton from '@ts/ui/drop_down_editor/drop_down_button';
 import ClearButton from '@ts/ui/text_box/text_editor.clear';
 import TextEditorButtonCollection from '@ts/ui/text_box/texteditor_button_collection/index';
 
diff --git a/packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_button.ts b/packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_button.ts
similarity index 96%
rename from packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_button.ts
rename to packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_button.ts
index 7c5a32078884..e724a1d835e3 100644
--- a/packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_button.ts
+++ b/packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_button.ts
@@ -9,8 +9,8 @@ import Button from '@js/ui/button';
 
 import type TextEditorBase from '../text_box/text_editor.base';
 import TextEditorButton from '../text_box/texteditor_button_collection/button';
-import type DropDownEditor from './m_drop_down_editor';
-import type { DropDownEditorProperties } from './m_drop_down_editor';
+import type DropDownEditor from './drop_down_editor';
+import type { DropDownEditorProperties } from './drop_down_editor';
 
 const DROP_DOWN_EDITOR_BUTTON_CLASS = 'dx-dropdowneditor-button';
 const DROP_DOWN_EDITOR_BUTTON_VISIBLE = 'dx-dropdowneditor-button-visible';
@@ -125,7 +125,6 @@ export default class DropDownButton extends TextEditorButton {
   }
 
   // TODO: get rid of it
-  // eslint-disable-next-line class-methods-use-this
   _legacyRender(
     $editor?: dxElementWrapper,
     $element?: dxElementWrapper,
diff --git a/packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_editor.ts b/packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_editor.ts
similarity index 98%
rename from packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_editor.ts
rename to packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_editor.ts
index 584b895fe9e8..09ddb4feb594 100644
--- a/packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_editor.ts
+++ b/packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_editor.ts
@@ -41,8 +41,8 @@ import TextBox from '@ts/ui/text_box/text_box';
 
 import type Popover from '../popover/m_popover';
 import type { TextEditorButtonInfo } from '../text_box/texteditor_button_collection/index';
-import DropDownButton from './m_drop_down_button';
-import { getElementWidth, getSizeValue } from './m_utils';
+import DropDownButton from './drop_down_button';
+import { getElementWidth, getSizeValue } from './utils';
 
 export const DROP_DOWN_EDITOR_CLASS = 'dx-dropdowneditor';
 const DROP_DOWN_EDITOR_INPUT_WRAPPER = 'dx-dropdowneditor-input-wrapper';
@@ -261,12 +261,10 @@ class DropDownEditor<
     };
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _useTemplates(): boolean {
     return true;
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _getDefaultPopupPosition(isRtlEnabled?: boolean): PositionConfig {
     const position = getDefaultAlignment(isRtlEnabled);
 
@@ -377,17 +375,14 @@ class DropDownEditor<
       .eq(0);
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _getAriaHasPopup(): string {
     return 'true';
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _getAriaAutocomplete(): string {
     return 'none';
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _getAriaRole(): string {
     return 'combobox';
   }
@@ -818,7 +813,6 @@ class DropDownEditor<
     this.setAria('label', OVERLAY_CONTENT_LABEL, $overlayContent);
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _renderPopupContent(): void {}
 
   _renderPopup(): void {
@@ -883,7 +877,6 @@ class DropDownEditor<
     this.setAria('id', this._popupContentId, $popupContent);
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _contentReadyHandler(): void {}
 
   _popupConfig(): PopupProperties {
@@ -927,7 +920,6 @@ class DropDownEditor<
     };
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _popupInitializedHandler(): void {}
 
   _getPopupInitializedHandler(): (e: PopupInitializedEvent) => void {
@@ -986,7 +978,6 @@ class DropDownEditor<
     }
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _popupShowingHandler(): void {}
 
   _popupHidingHandler(): void {
@@ -1173,7 +1164,6 @@ class DropDownEditor<
     return super._getSubmitElement();
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _shouldLogFieldTemplateDeprecationWarning(): boolean {
     return false;
   }
diff --git a/packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_list.ts b/packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_list.ts
similarity index 98%
rename from packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_list.ts
rename to packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_list.ts
index 39b75f293013..1bbf6b5d8299 100644
--- a/packages/devextreme/js/__internal/ui/drop_down_editor/m_drop_down_list.ts
+++ b/packages/devextreme/js/__internal/ui/drop_down_editor/drop_down_list.ts
@@ -31,7 +31,7 @@ import errors from '@js/ui/widget/ui.errors';
 import type { OptionChanged } from '@ts/core/widget/types';
 import { getDataSourceOptions } from '@ts/data/data_converter/grouped';
 import type DataController from '@ts/ui/collection/m_data_controller';
-import DropDownEditor from '@ts/ui/drop_down_editor/m_drop_down_editor';
+import DropDownEditor from '@ts/ui/drop_down_editor/drop_down_editor';
 import type { ListBaseProperties } from '@ts/ui/list/list.base';
 import List from '@ts/ui/list/list.edit.search';
 
@@ -67,6 +67,7 @@ class DropDownList<
 
   _listId?: string;
 
+  // eslint-disable-next-line no-restricted-globals
   _searchTimer?: ReturnType<typeof setTimeout>;
 
   _isLastMinSearchLengthExceeded?: boolean;
@@ -252,7 +253,6 @@ class DropDownList<
     }
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _fitIntoRange(value: number, start: number, end: number): number {
     if (value > end) {
       return start;
@@ -312,7 +312,6 @@ class DropDownList<
     }
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _popupWrapperClass(): string {
     return DROPDOWNLIST_POPUP_WRAPPER_CLASS;
   }
@@ -574,7 +573,6 @@ class DropDownList<
     this.setAria('owns', this._popup && this._popupContentId);
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _getAriaHasPopup(): string {
     return 'listbox';
   }
@@ -591,7 +589,6 @@ class DropDownList<
     return Boolean(dataSource) !== this._needPassDataSourceToList();
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _isDesktopDevice(): boolean {
     return devices.real().deviceType === 'desktop';
   }
@@ -644,7 +641,6 @@ class DropDownList<
     return options;
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _canListHaveFocus(): boolean {
     return false;
   }
@@ -653,7 +649,6 @@ class DropDownList<
     return this._needPassDataSourceToList() ? this._dataSource : null;
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _dataSourceOptions(): Partial<DataSourceOptions<Item>> {
     return {
       paginate: false,
@@ -673,7 +668,6 @@ class DropDownList<
     return dataSource;
   }
 
-  // eslint-disable-next-line class-methods-use-this
   _dataSourceFromUrlLoadMode(): string {
     return 'raw';
   }
@@ -710,7 +704,7 @@ class DropDownList<
     this._itemClickAction(e);
   }
 
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars, class-methods-use-this
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   _listItemClickHandler(e?: ItemClickEvent<Item>): void { }
 
   _setListDataSource(): void {
diff --git a/packages/devextreme/js/__internal/ui/drop_down_editor/m_utils.ts b/packages/devextreme/js/__internal/ui/drop_down_editor/utils.ts
similarity index 100%
rename from packages/devextreme/js/__internal/ui/drop_down_editor/m_utils.ts
rename to packages/devextreme/js/__internal/ui/drop_down_editor/utils.ts
diff --git a/packages/devextreme/js/__internal/ui/form/form.layout_manager.utils.ts b/packages/devextreme/js/__internal/ui/form/form.layout_manager.utils.ts
index 8212c9f5cbcb..218ab38e6b4c 100644
--- a/packages/devextreme/js/__internal/ui/form/form.layout_manager.utils.ts
+++ b/packages/devextreme/js/__internal/ui/form/form.layout_manager.utils.ts
@@ -15,7 +15,7 @@ import type {
 import type {
   FormItemComponent, FormLabelMode, LabelLocation, SimpleItem,
 } from '@js/ui/form';
-import type { DropDownEditorProperties } from '@ts/ui/drop_down_editor/m_drop_down_editor';
+import type { DropDownEditorProperties } from '@ts/ui/drop_down_editor/drop_down_editor';
 import type { EditorProperties } from '@ts/ui/editor/editor';
 import type Editor from '@ts/ui/editor/editor';
 import type { LabelOptions } from '@ts/ui/form/components/label';
diff --git a/packages/devextreme/js/__internal/ui/form/form.ts b/packages/devextreme/js/__internal/ui/form/form.ts
index e31a7cd7b463..770c4e26da15 100644
--- a/packages/devextreme/js/__internal/ui/form/form.ts
+++ b/packages/devextreme/js/__internal/ui/form/form.ts
@@ -51,7 +51,7 @@ import type { OptionChanged } from '@ts/core/widget/types';
 import type { SupportedKeyHandler } from '@ts/core/widget/widget';
 import Widget, { FOCUSED_STATE_CLASS } from '@ts/core/widget/widget';
 import type { Button } from '@ts/ui/button/button';
-import { DROP_DOWN_EDITOR_CLASS } from '@ts/ui/drop_down_editor/m_drop_down_editor';
+import { DROP_DOWN_EDITOR_CLASS } from '@ts/ui/drop_down_editor/drop_down_editor';
 import Editor from '@ts/ui/editor/editor';
 import { setLabelWidthByMaxLabelWidth } from '@ts/ui/form/components/label';
 import {
diff --git a/packages/devextreme/js/__internal/ui/m_autocomplete.ts b/packages/devextreme/js/__internal/ui/m_autocomplete.ts
index 39da053ba0e7..6d9f871f3011 100644
--- a/packages/devextreme/js/__internal/ui/m_autocomplete.ts
+++ b/packages/devextreme/js/__internal/ui/m_autocomplete.ts
@@ -6,7 +6,7 @@ import { extend } from '@js/core/utils/extend';
 import type { Properties } from '@js/ui/autocomplete';
 import { isDefined } from '@ts/core/utils/m_type';
 import type { OptionChanged } from '@ts/core/widget/types';
-import DropDownList from '@ts/ui/drop_down_editor/m_drop_down_list';
+import DropDownList from '@ts/ui/drop_down_editor/drop_down_list';
 
 const AUTOCOMPLETE_CLASS = 'dx-autocomplete';
 const AUTOCOMPLETE_POPUP_WRAPPER_CLASS = 'dx-autocomplete-popup-wrapper';
diff --git a/packages/devextreme/js/__internal/ui/m_drop_down_box.ts b/packages/devextreme/js/__internal/ui/m_drop_down_box.ts
index d16be426a8bf..cf836be81eac 100644
--- a/packages/devextreme/js/__internal/ui/m_drop_down_box.ts
+++ b/packages/devextreme/js/__internal/ui/m_drop_down_box.ts
@@ -18,7 +18,7 @@ import type { Properties } from '@js/ui/drop_down_box';
 import DataExpressionMixin from '@js/ui/editor/ui.data_expression';
 import type { Properties as PopupProperties } from '@js/ui/popup';
 import { tabbable } from '@ts/core/utils/m_selectors';
-import DropDownEditor from '@ts/ui/drop_down_editor/m_drop_down_editor';
+import DropDownEditor from '@ts/ui/drop_down_editor/drop_down_editor';
 import { getElementMaxHeightByWindow } from '@ts/ui/overlay/utils';
 
 const { getActiveElement } = domAdapter;
diff --git a/packages/devextreme/js/__internal/ui/m_drop_down_button.ts b/packages/devextreme/js/__internal/ui/m_drop_down_button.ts
index c13cc18b91c8..24ba7b15ad02 100644
--- a/packages/devextreme/js/__internal/ui/m_drop_down_button.ts
+++ b/packages/devextreme/js/__internal/ui/m_drop_down_button.ts
@@ -21,7 +21,7 @@ import ButtonGroup from '@js/ui/button_group';
 import type { Item, Properties } from '@js/ui/drop_down_button';
 import type { OptionChanged } from '@ts/core/widget/types';
 import Widget from '@ts/core/widget/widget';
-import { getElementWidth, getSizeValue } from '@ts/ui/drop_down_editor/m_utils';
+import { getElementWidth, getSizeValue } from '@ts/ui/drop_down_editor/utils';
 import type { ListBaseProperties } from '@ts/ui/list/list.base';
 import List from '@ts/ui/list/list.edit.search';
 import type { PopupProperties } from '@ts/ui/popup/m_popup';
diff --git a/packages/devextreme/js/__internal/ui/m_lookup.ts b/packages/devextreme/js/__internal/ui/m_lookup.ts
index 99c2993729bd..78cdc14f818c 100644
--- a/packages/devextreme/js/__internal/ui/m_lookup.ts
+++ b/packages/devextreme/js/__internal/ui/m_lookup.ts
@@ -21,8 +21,8 @@ import Popover from '@js/ui/popover/ui.popover';
 import { current, isMaterial } from '@js/ui/themes';
 import supportUtils from '@ts/core/utils/m_support';
 import type { OptionChanged } from '@ts/core/widget/types';
-import DropDownList from '@ts/ui/drop_down_editor/m_drop_down_list';
-import { getElementWidth } from '@ts/ui/drop_down_editor/m_utils';
+import DropDownList from '@ts/ui/drop_down_editor/drop_down_list';
+import { getElementWidth } from '@ts/ui/drop_down_editor/utils';
 import TextBox from '@ts/ui/text_box/text_box';
 
 const window = getWindow();
diff --git a/packages/devextreme/js/__internal/ui/m_select_box.ts b/packages/devextreme/js/__internal/ui/m_select_box.ts
index d3c35d847391..e71557681703 100644
--- a/packages/devextreme/js/__internal/ui/m_select_box.ts
+++ b/packages/devextreme/js/__internal/ui/m_select_box.ts
@@ -19,7 +19,7 @@ import { extend } from '@js/core/utils/extend';
 import { each } from '@js/core/utils/iterator';
 import { isDefined, isPromise } from '@js/core/utils/type';
 import type { Properties } from '@js/ui/select_box';
-import DropDownList from '@ts/ui/drop_down_editor/m_drop_down_list';
+import DropDownList from '@ts/ui/drop_down_editor/drop_down_list';
 
 import type { ValueChangedEvent } from './editor/editor';
 
diff --git a/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_editor.js b/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_editor.js
index cfbba249bbae..8cbeb2142fee 100644
--- a/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_editor.js
+++ b/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_editor.js
@@ -1,4 +1,4 @@
-import DropDownEditor from '../../__internal/ui/drop_down_editor/m_drop_down_editor';
+import DropDownEditor from '../../__internal/ui/drop_down_editor/drop_down_editor';
 
 export default DropDownEditor;
 
diff --git a/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_list.js b/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_list.js
index 796e99ab15e5..fcf6bb47ceed 100644
--- a/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_list.js
+++ b/packages/devextreme/js/ui/drop_down_editor/ui.drop_down_list.js
@@ -1,4 +1,4 @@
-import DropDownList from '../../__internal/ui/drop_down_editor/m_drop_down_list';
+import DropDownList from '../../__internal/ui/drop_down_editor/drop_down_list';
 
 export default DropDownList;
 
diff --git a/packages/devextreme/testing/helpers/diagramHelpers.js b/packages/devextreme/testing/helpers/diagramHelpers.js
index adadbab0b32f..86d8d5dfda8f 100644
--- a/packages/devextreme/testing/helpers/diagramHelpers.js
+++ b/packages/devextreme/testing/helpers/diagramHelpers.js
@@ -1,6 +1,6 @@
 import $ from 'jquery';
 import diagramContextMenuModule from '__internal/ui/diagram/ui.diagram.context_menu';
-import { DROP_DOWN_EDITOR_BEFORE_FIELD_ADDON } from '__internal/ui/drop_down_editor/m_drop_down_editor';
+import { DROP_DOWN_EDITOR_BEFORE_FIELD_ADDON } from '__internal/ui/drop_down_editor/drop_down_editor';
 
 export const Consts = {
     SIMPLE_DIAGRAM: '{ "shapes": [{ "key":"107", "type":"Ellipsis", "text":"A new ticket", "x":1440, "y":1080, "width":1440, "height":720, "zIndex":0 }] }',
diff --git a/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.markup.tests.js b/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.markup.tests.js
index 0e448395e8d0..38994a97bf07 100644
--- a/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.markup.tests.js
+++ b/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.markup.tests.js
@@ -3,7 +3,7 @@ import { Deferred } from 'core/utils/deferred';
 import {
     DROP_DOWN_EDITOR_BEFORE_FIELD_ADDON,
     DROP_DOWN_EDITOR_AFTER_FIELD_ADDON
-} from '__internal/ui/drop_down_editor/m_drop_down_editor';
+} from '__internal/ui/drop_down_editor/drop_down_editor';
 
 import 'ui/drop_down_editor/ui.drop_down_editor';
 
diff --git a/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.tests.js b/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.tests.js
index e67c113c7838..6672cb88b045 100644
--- a/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.tests.js
+++ b/packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/dropDownEditor.tests.js
@@ -17,7 +17,7 @@ import domAdapter from '__internal/core/m_dom_adapter';
 import {
     DROP_DOWN_EDITOR_BEFORE_FIELD_ADDON,
     DROP_DOWN_EDITOR_AFTER_FIELD_ADDON
-} from '__internal/ui/drop_down_editor/m_drop_down_editor';
+} from '__internal/ui/drop_down_editor/drop_down_editor';
 
 import 'fluent_blue_light.css!';
 import 'ui/validator';
diff --git a/packages/devextreme/testing/tests/DevExpress.ui.widgets/diagramParts/mainToolbar.tests.js b/packages/devextreme/testing/tests/DevExpress.ui.widgets/diagramParts/mainToolbar.tests.js
index aa208e045eb9..1200db63f5e9 100644
--- a/packages/devextreme/testing/tests/DevExpress.ui.widgets/diagramParts/mainToolbar.tests.js
+++ b/packages/devextreme/testing/tests/DevExpress.ui.widgets/diagramParts/mainToolbar.tests.js
@@ -5,7 +5,7 @@ import 'ui/diagram';
 import { DiagramCommand } from 'devexpress-diagram';
 import { Consts, getMainToolbarInstance, findMainToolbarItem, getToolbarIcon, findContextMenuItem } from '../../../helpers/diagramHelpers.js';
 import { getActiveElement } from '../../../helpers/shadowDom.js';
-import { DROP_DOWN_EDITOR_BEFORE_FIELD_ADDON } from '__internal/ui/drop_down_editor/m_drop_down_editor';
+import { DROP_DOWN_EDITOR_BEFORE_FIELD_ADDON } from '__internal/ui/drop_down_editor/drop_down_editor';
 
 const moduleConfig = {
     beforeEach: function() {