diff --git a/packages/ra-core/src/form/FormField.tsx b/packages/ra-core/src/form/FormField.tsx
index f424a8b17bc..fe0b3f25ed3 100644
--- a/packages/ra-core/src/form/FormField.tsx
+++ b/packages/ra-core/src/form/FormField.tsx
@@ -24,7 +24,7 @@ interface Props
     validate?: Validator | Validator[];
 }
 
-export const FormField: FunctionComponent<Props> = ({
+const FormField: FunctionComponent<Props> = ({
     id,
     input,
     validate,
diff --git a/packages/ra-ui-materialui/src/detail/SimpleShowLayout.js b/packages/ra-ui-materialui/src/detail/SimpleShowLayout.js
index fd35c7f27d3..1aee01dd0cd 100644
--- a/packages/ra-ui-materialui/src/detail/SimpleShowLayout.js
+++ b/packages/ra-ui-materialui/src/detail/SimpleShowLayout.js
@@ -49,7 +49,7 @@ const sanitizeRestProps = ({
  *     );
  *     export default App;
  */
-export const SimpleShowLayout = ({
+const SimpleShowLayout = ({
     basePath,
     className,
     children,
diff --git a/packages/ra-ui-materialui/src/field/FileField.spec.js b/packages/ra-ui-materialui/src/field/FileField.spec.js
index e017ab7a588..406aa0f9c7c 100644
--- a/packages/ra-ui-materialui/src/field/FileField.spec.js
+++ b/packages/ra-ui-materialui/src/field/FileField.spec.js
@@ -1,6 +1,6 @@
 import React from 'react';
 import expect from 'expect';
-import { FileField } from './FileField';
+import FileField from './FileField';
 import { render, cleanup } from '@testing-library/react';
 
 const defaultProps = {
diff --git a/packages/ra-ui-materialui/src/field/FileField.tsx b/packages/ra-ui-materialui/src/field/FileField.tsx
index dde47b6a636..0e37eb3a1b0 100644
--- a/packages/ra-ui-materialui/src/field/FileField.tsx
+++ b/packages/ra-ui-materialui/src/field/FileField.tsx
@@ -21,7 +21,7 @@ interface Props extends FieldProps {
     classes?: object;
 }
 
-export const FileField: FunctionComponent<Props & InjectedFieldProps> = ({
+const FileField: FunctionComponent<Props & InjectedFieldProps> = ({
     className,
     classes: classesOverride,
     record,
diff --git a/packages/ra-ui-materialui/src/field/ImageField.spec.js b/packages/ra-ui-materialui/src/field/ImageField.spec.js
index ee93bb4cd76..3fc8438a2ab 100644
--- a/packages/ra-ui-materialui/src/field/ImageField.spec.js
+++ b/packages/ra-ui-materialui/src/field/ImageField.spec.js
@@ -1,7 +1,7 @@
 import React from 'react';
 import expect from 'expect';
 import { render, cleanup } from '@testing-library/react';
-import { ImageField } from './ImageField';
+import ImageField from './ImageField';
 
 const defaultProps = {
     classes: {},
diff --git a/packages/ra-ui-materialui/src/field/ImageField.tsx b/packages/ra-ui-materialui/src/field/ImageField.tsx
index 4b93b8c9f6c..cbac9cb42af 100644
--- a/packages/ra-ui-materialui/src/field/ImageField.tsx
+++ b/packages/ra-ui-materialui/src/field/ImageField.tsx
@@ -27,7 +27,7 @@ interface Props extends FieldProps {
     classes?: object;
 }
 
-export const ImageField: FunctionComponent<Props & InjectedFieldProps> = ({
+const ImageField: FunctionComponent<Props & InjectedFieldProps> = ({
     className,
     classes: classesOverride,
     record,
diff --git a/packages/ra-ui-materialui/src/field/ReferenceArrayField.js b/packages/ra-ui-materialui/src/field/ReferenceArrayField.js
index b08317912e5..85cc19b2ad4 100644
--- a/packages/ra-ui-materialui/src/field/ReferenceArrayField.js
+++ b/packages/ra-ui-materialui/src/field/ReferenceArrayField.js
@@ -37,7 +37,7 @@ import { fieldPropTypes } from './types';
  * </ReferenceArrayField>
  *
  */
-export const ReferenceArrayField = ({ children, ...props }) => {
+const ReferenceArrayField = ({ children, ...props }) => {
     if (React.Children.count(children) !== 1) {
         throw new Error(
             '<ReferenceArrayField> only accepts a single child (like <Datagrid>)'
diff --git a/packages/ra-ui-materialui/src/form/FormInput.js b/packages/ra-ui-materialui/src/form/FormInput.js
index c7573d07c85..94170ce2993 100644
--- a/packages/ra-ui-materialui/src/form/FormInput.js
+++ b/packages/ra-ui-materialui/src/form/FormInput.js
@@ -14,7 +14,7 @@ const useStyles = makeStyles(
     { name: 'RaFormInput' }
 );
 
-export const FormInput = ({ input, classes: classesOverride, ...rest }) => {
+const FormInput = ({ input, classes: classesOverride, ...rest }) => {
     const classes = useStyles({ classes: classesOverride });
     return input ? (
         <div
diff --git a/packages/ra-ui-materialui/src/input/ArrayInput.tsx b/packages/ra-ui-materialui/src/input/ArrayInput.tsx
index 97e31bd9501..7dee08fffe7 100644
--- a/packages/ra-ui-materialui/src/input/ArrayInput.tsx
+++ b/packages/ra-ui-materialui/src/input/ArrayInput.tsx
@@ -47,7 +47,7 @@ import sanitizeRestProps from './sanitizeRestProps';
  *
  * @see https://github.com/final-form/react-final-form-arrays
  */
-export const ArrayInput = ({
+const ArrayInput = ({
     className,
     defaultValue,
     label,
diff --git a/packages/ra-ui-materialui/src/input/DateInput.tsx b/packages/ra-ui-materialui/src/input/DateInput.tsx
index be1ba1d2091..39179377235 100644
--- a/packages/ra-ui-materialui/src/input/DateInput.tsx
+++ b/packages/ra-ui-materialui/src/input/DateInput.tsx
@@ -42,7 +42,7 @@ const getStringFromDate = (value: string | Date) => {
     return convertDateToString(new Date(value));
 };
 
-export const DateInput: FunctionComponent<
+const DateInput: FunctionComponent<
     InputProps<TextFieldProps> & Omit<TextFieldProps, 'helperText' | 'label'>
 > = ({
     format = getStringFromDate,
diff --git a/packages/ra-ui-materialui/src/input/DateTimeInput.tsx b/packages/ra-ui-materialui/src/input/DateTimeInput.tsx
index bd4c17b782c..72dcb141351 100644
--- a/packages/ra-ui-materialui/src/input/DateTimeInput.tsx
+++ b/packages/ra-ui-materialui/src/input/DateTimeInput.tsx
@@ -63,7 +63,7 @@ const parseDateTime = (value: string) => new Date(value);
 /**
  * Input component for entering a date and a time with timezone, using the browser locale
  */
-export const DateTimeInput: FunctionComponent<
+const DateTimeInput: FunctionComponent<
     InputProps<TextFieldProps> & Omit<TextFieldProps, 'helperText' | 'label'>
 > = ({
     format = formatDateTime,
diff --git a/packages/ra-ui-materialui/src/input/Labeled.tsx b/packages/ra-ui-materialui/src/input/Labeled.tsx
index 80b0cf7926f..5105cdcae58 100644
--- a/packages/ra-ui-materialui/src/input/Labeled.tsx
+++ b/packages/ra-ui-materialui/src/input/Labeled.tsx
@@ -55,7 +55,7 @@ interface Props {
  *     <FooComponent source="title" />
  * </Labeled>
  */
-export const Labeled: FunctionComponent<Props> = ({
+const Labeled: FunctionComponent<Props> = ({
     children,
     className,
     classes: classesOverride,
diff --git a/packages/ra-ui-materialui/src/input/RadioButtonGroupInput.tsx b/packages/ra-ui-materialui/src/input/RadioButtonGroupInput.tsx
index 6d33cf173d1..48b610cf91c 100644
--- a/packages/ra-ui-materialui/src/input/RadioButtonGroupInput.tsx
+++ b/packages/ra-ui-materialui/src/input/RadioButtonGroupInput.tsx
@@ -85,7 +85,7 @@ const useStyles = makeStyles(
  *
  * The object passed as `options` props is passed to the material-ui <RadioButtonGroup> component
  */
-export const RadioButtonGroupInput: FunctionComponent<
+const RadioButtonGroupInput: FunctionComponent<
     ChoicesProps & InputProps<RadioGroupProps> & FormControlProps
 > = ({
     choices = [],
diff --git a/packages/ra-ui-materialui/src/input/ReferenceArrayInput.js b/packages/ra-ui-materialui/src/input/ReferenceArrayInput.js
index c53c237ec1a..6958246b9d7 100644
--- a/packages/ra-ui-materialui/src/input/ReferenceArrayInput.js
+++ b/packages/ra-ui-materialui/src/input/ReferenceArrayInput.js
@@ -89,7 +89,7 @@ import ReferenceError from './ReferenceError';
  *     <SelectArrayInput optionText="name" />
  * </ReferenceArrayInput>
  */
-export const ReferenceArrayInput = ({
+const ReferenceArrayInput = ({
     children,
     id: idOverride,
     onBlur,
diff --git a/packages/ra-ui-materialui/src/input/ReferenceInput.tsx b/packages/ra-ui-materialui/src/input/ReferenceInput.tsx
index 4da477eb06a..41fb0c78b01 100644
--- a/packages/ra-ui-materialui/src/input/ReferenceInput.tsx
+++ b/packages/ra-ui-materialui/src/input/ReferenceInput.tsx
@@ -109,7 +109,7 @@ interface Props {
  *     <SelectInput optionText="title" />
  * </ReferenceInput>
  */
-export const ReferenceInput: FunctionComponent<Props & InputProps> = ({
+const ReferenceInput: FunctionComponent<Props & InputProps> = ({
     format,
     onBlur,
     onChange,
diff --git a/packages/ra-ui-materialui/src/input/TextInput.tsx b/packages/ra-ui-materialui/src/input/TextInput.tsx
index 00ff175e1c0..d3476a7be36 100644
--- a/packages/ra-ui-materialui/src/input/TextInput.tsx
+++ b/packages/ra-ui-materialui/src/input/TextInput.tsx
@@ -24,7 +24,7 @@ export type TextInputProps = InputProps<TextFieldProps> &
  *
  * The object passed as `options` props is passed to the <ResettableTextField> component
  */
-export const TextInput: FunctionComponent<TextInputProps> = ({
+const TextInput: FunctionComponent<TextInputProps> = ({
     label,
     format,
     helperText,
diff --git a/packages/ra-ui-materialui/src/layout/LoadingIndicator.js b/packages/ra-ui-materialui/src/layout/LoadingIndicator.js
index dd505842858..b93588d9382 100644
--- a/packages/ra-ui-materialui/src/layout/LoadingIndicator.js
+++ b/packages/ra-ui-materialui/src/layout/LoadingIndicator.js
@@ -16,11 +16,7 @@ const useStyles = makeStyles(
     { name: 'RaLoadingIndicator' }
 );
 
-export const LoadingIndicator = ({
-    classes: classesOverride,
-    className,
-    ...rest
-}) => {
+const LoadingIndicator = ({ classes: classesOverride, className, ...rest }) => {
     const loading = useSelector(state => state.admin.loading > 0);
     const classes = useStyles({ classes: classesOverride });
     return loading ? (
diff --git a/packages/ra-ui-materialui/src/list/DatagridCell.js b/packages/ra-ui-materialui/src/list/DatagridCell.js
index 6c2aa1ee97e..9d4c3e4240b 100644
--- a/packages/ra-ui-materialui/src/list/DatagridCell.js
+++ b/packages/ra-ui-materialui/src/list/DatagridCell.js
@@ -15,7 +15,7 @@ const sanitizeRestProps = ({
     ...rest
 }) => rest;
 
-export const DatagridCell = ({
+const DatagridCell = ({
     className,
     field,
     record,
diff --git a/packages/ra-ui-materialui/src/list/DatagridCell.spec.js b/packages/ra-ui-materialui/src/list/DatagridCell.spec.js
index 76e81b049f5..55be959ff63 100644
--- a/packages/ra-ui-materialui/src/list/DatagridCell.spec.js
+++ b/packages/ra-ui-materialui/src/list/DatagridCell.spec.js
@@ -3,7 +3,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { shallow } from 'enzyme';
 
-import { DatagridCell } from './DatagridCell';
+import DatagridCell from './DatagridCell';
 
 describe('<DatagridCell />', () => {
     const Field = () => <div />;
diff --git a/packages/ra-ui-materialui/src/list/Filter.spec.js b/packages/ra-ui-materialui/src/list/Filter.spec.js
index fef8daf155a..00bcae06320 100644
--- a/packages/ra-ui-materialui/src/list/Filter.spec.js
+++ b/packages/ra-ui-materialui/src/list/Filter.spec.js
@@ -1,6 +1,6 @@
 import React from 'react';
 import { render, cleanup } from '@testing-library/react';
-import { TextInput } from '../input/TextInput';
+import TextInput from '../input/TextInput';
 import Filter from './Filter';
 
 describe('<Filter />', () => {