diff --git a/.eslintignore b/.eslintignore
index cef372f88..4b6451c93 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -549,7 +549,10 @@ packages/app-mobile/components/NoteList.js
 packages/app-mobile/components/ProfileSwitcher/ProfileEditor.js
 packages/app-mobile/components/ProfileSwitcher/ProfileSwitcher.js
 packages/app-mobile/components/ProfileSwitcher/useProfileConfig.js
-packages/app-mobile/components/ScreenHeader.js
+packages/app-mobile/components/ScreenHeader/WarningBanner.test.js
+packages/app-mobile/components/ScreenHeader/WarningBanner.js
+packages/app-mobile/components/ScreenHeader/WarningBox.js
+packages/app-mobile/components/ScreenHeader/index.js
 packages/app-mobile/components/SelectDateTimeDialog.js
 packages/app-mobile/components/SideMenu.js
 packages/app-mobile/components/TextInput.js
diff --git a/.gitignore b/.gitignore
index e01e1cfd4..d796b36f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -529,7 +529,10 @@ packages/app-mobile/components/NoteList.js
 packages/app-mobile/components/ProfileSwitcher/ProfileEditor.js
 packages/app-mobile/components/ProfileSwitcher/ProfileSwitcher.js
 packages/app-mobile/components/ProfileSwitcher/useProfileConfig.js
-packages/app-mobile/components/ScreenHeader.js
+packages/app-mobile/components/ScreenHeader/WarningBanner.test.js
+packages/app-mobile/components/ScreenHeader/WarningBanner.js
+packages/app-mobile/components/ScreenHeader/WarningBox.js
+packages/app-mobile/components/ScreenHeader/index.js
 packages/app-mobile/components/SelectDateTimeDialog.js
 packages/app-mobile/components/SideMenu.js
 packages/app-mobile/components/TextInput.js
diff --git a/packages/app-mobile/components/SaveIcon.png b/packages/app-mobile/components/ScreenHeader/SaveIcon.png
similarity index 100%
rename from packages/app-mobile/components/SaveIcon.png
rename to packages/app-mobile/components/ScreenHeader/SaveIcon.png
diff --git a/packages/app-mobile/components/ScreenHeader/WarningBanner.test.tsx b/packages/app-mobile/components/ScreenHeader/WarningBanner.test.tsx
new file mode 100644
index 000000000..e1258c072
--- /dev/null
+++ b/packages/app-mobile/components/ScreenHeader/WarningBanner.test.tsx
@@ -0,0 +1,48 @@
+import * as React from 'react';
+import { WarningBannerComponent } from './WarningBanner';
+import Setting from '@joplin/lib/models/Setting';
+import NavService from '@joplin/lib/services/NavService';
+import { render, screen, userEvent } from '@testing-library/react-native';
+
+interface WrapperProps {
+	showMissingMasterKeyMessage?: boolean;
+	hasDisabledSyncItems?: boolean;
+	shouldUpgradeSyncTarget?: boolean;
+	showShouldUpgradeSyncTargetMessage?: boolean;
+	hasDisabledEncryptionItems?: boolean;
+	mustUpgradeAppMessage?: string;
+}
+
+const WarningBannerWrapper: React.FC<WrapperProps> = props => {
+	return <WarningBannerComponent
+		themeId={Setting.THEME_LIGHT}
+		showMissingMasterKeyMessage={props.showMissingMasterKeyMessage ?? false}
+		hasDisabledSyncItems={props.hasDisabledSyncItems ?? false}
+		shouldUpgradeSyncTarget={props.shouldUpgradeSyncTarget ?? false}
+		showShouldUpgradeSyncTargetMessage={props.showShouldUpgradeSyncTargetMessage ?? false}
+		hasDisabledEncryptionItems={props.hasDisabledEncryptionItems ?? false}
+		mustUpgradeAppMessage={props.mustUpgradeAppMessage ?? ''}
+	/>;
+};
+
+describe('WarningBanner', () => {
+	let navServiceMock: jest.Mock<(route: unknown)=> void>;
+	beforeEach(() => {
+		navServiceMock = jest.fn();
+		NavService.dispatch = navServiceMock;
+		jest.useFakeTimers();
+	});
+
+	test('the missing master key alert should link to the encryption config screen', async () => {
+		render(<WarningBannerWrapper showMissingMasterKeyMessage={true}/>);
+		expect(await screen.findAllByTestId('warning-box')).toHaveLength(1);
+
+		expect(navServiceMock).not.toHaveBeenCalled();
+
+		const masterKeyWarning = screen.getByText(/decryption password/);
+		const user = userEvent.setup();
+		await user.press(masterKeyWarning);
+
+		expect(navServiceMock.mock.lastCall).toMatchObject([{ routeName: 'EncryptionConfig' }]);
+	});
+});
diff --git a/packages/app-mobile/components/ScreenHeader/WarningBanner.tsx b/packages/app-mobile/components/ScreenHeader/WarningBanner.tsx
new file mode 100644
index 000000000..af5192501
--- /dev/null
+++ b/packages/app-mobile/components/ScreenHeader/WarningBanner.tsx
@@ -0,0 +1,67 @@
+import * as React from 'react';
+import { connect } from 'react-redux';
+import { AppState } from '../../utils/types';
+import WarningBox from './WarningBox';
+import { _ } from '@joplin/lib/locale';
+import { showMissingMasterKeyMessage } from '@joplin/lib/services/e2ee/utils';
+import { localSyncInfoFromState } from '@joplin/lib/services/synchronizer/syncInfoUtils';
+import Setting from '@joplin/lib/models/Setting';
+
+interface Props {
+	themeId: number;
+	showMissingMasterKeyMessage: boolean;
+	hasDisabledSyncItems: boolean;
+	shouldUpgradeSyncTarget: boolean;
+	showShouldUpgradeSyncTargetMessage: boolean|undefined;
+	hasDisabledEncryptionItems: boolean;
+	mustUpgradeAppMessage: string;
+}
+
+
+export const WarningBannerComponent: React.FC<Props> = props => {
+	const warningComps = [];
+
+	const renderWarningBox = (screen: string, message: string) => {
+		return <WarningBox
+			key={screen}
+			themeId={props.themeId}
+			targetScreen={screen}
+			message={message}
+			testID='warning-box'
+		/>;
+	};
+
+	if (props.showMissingMasterKeyMessage) {
+		warningComps.push(renderWarningBox('EncryptionConfig', _('Press to set the decryption password.')));
+	}
+	if (props.hasDisabledSyncItems) {
+		warningComps.push(renderWarningBox('Status', _('Some items cannot be synchronised. Press for more info.')));
+	}
+	if (props.shouldUpgradeSyncTarget && props.showShouldUpgradeSyncTargetMessage !== false) {
+		warningComps.push(renderWarningBox('UpgradeSyncTarget', _('The sync target needs to be upgraded. Press this banner to proceed.')));
+	}
+	if (props.mustUpgradeAppMessage) {
+		warningComps.push(renderWarningBox('UpgradeApp', props.mustUpgradeAppMessage));
+	}
+	if (props.hasDisabledEncryptionItems) {
+		warningComps.push(renderWarningBox('Status', _('Some items cannot be decrypted.')));
+	}
+
+	return warningComps;
+};
+
+export default connect((state: AppState) => {
+	const syncInfo = localSyncInfoFromState(state);
+
+	return {
+		themeId: state.settings.theme,
+		hasDisabledEncryptionItems: state.hasDisabledEncryptionItems,
+		noteSelectionEnabled: state.noteSelectionEnabled,
+		selectedFolderId: state.selectedFolderId,
+		notesParentType: state.notesParentType,
+		showMissingMasterKeyMessage: showMissingMasterKeyMessage(syncInfo, state.notLoadedMasterKeys),
+		hasDisabledSyncItems: state.hasDisabledSyncItems,
+		shouldUpgradeSyncTarget: state.settings['sync.upgradeState'] === Setting.SYNC_UPGRADE_STATE_SHOULD_DO,
+		mustUpgradeAppMessage: state.mustUpgradeAppMessage,
+	};
+})(WarningBannerComponent);
diff --git a/packages/app-mobile/components/ScreenHeader/WarningBox.tsx b/packages/app-mobile/components/ScreenHeader/WarningBox.tsx
new file mode 100644
index 000000000..f336aec03
--- /dev/null
+++ b/packages/app-mobile/components/ScreenHeader/WarningBox.tsx
@@ -0,0 +1,51 @@
+import * as React from 'react';
+import { useMemo, useCallback } from 'react';
+import { TouchableOpacity, StyleSheet, Text } from 'react-native';
+import { themeStyle } from '../global-style';
+import NavService from '@joplin/lib/services/NavService';
+
+interface Props {
+	themeId: number;
+	targetScreen: string;
+	message: string;
+	testID?: string;
+}
+
+const useStyles = (themeId: number) => {
+	return useMemo(() => {
+		const theme = themeStyle(themeId);
+		return StyleSheet.create({
+			container: {
+				backgroundColor: '#ff9900',
+				flexDirection: 'row',
+				padding: theme.marginLeft,
+			},
+			text: {
+				flex: 1,
+				color: 'black',
+			},
+		});
+	}, [themeId]);
+};
+
+const WarningBox: React.FC<Props> = props => {
+	const styles = useStyles(props.themeId);
+
+	const onPress = useCallback(() => {
+		void NavService.go(props.targetScreen);
+	}, [props.targetScreen]);
+
+	return (
+		<TouchableOpacity
+			style={styles.container}
+			onPress={onPress}
+			activeOpacity={0.8}
+			accessibilityRole='button'
+			testID={props.testID}
+		>
+			<Text style={styles.text}>{props.message}</Text>
+		</TouchableOpacity>
+	);
+};
+
+export default WarningBox;
diff --git a/packages/app-mobile/components/ScreenHeader.tsx b/packages/app-mobile/components/ScreenHeader/index.tsx
similarity index 89%
rename from packages/app-mobile/components/ScreenHeader.tsx
rename to packages/app-mobile/components/ScreenHeader/index.tsx
index e8ef038e5..8997ffe70 100644
--- a/packages/app-mobile/components/ScreenHeader.tsx
+++ b/packages/app-mobile/components/ScreenHeader/index.tsx
@@ -1,32 +1,29 @@
-const React = require('react');
-
-import { connect } from 'react-redux';
+import * as React from 'react';
 import { PureComponent, ReactElement } from 'react';
+import { connect } from 'react-redux';
 import { View, Text, StyleSheet, TouchableOpacity, Image, ScrollView, Dimensions, ViewStyle } from 'react-native';
 const Icon = require('react-native-vector-icons/Ionicons').default;
-const { BackButtonService } = require('../services/back-button.js');
+const { BackButtonService } = require('../../services/back-button.js');
 import NavService from '@joplin/lib/services/NavService';
 import { Menu, MenuOptions, MenuOption, MenuTrigger } from 'react-native-popup-menu';
 import { _, _n } from '@joplin/lib/locale';
-import Setting from '@joplin/lib/models/Setting';
 import Note from '@joplin/lib/models/Note';
 import Folder from '@joplin/lib/models/Folder';
-import { themeStyle } from './global-style';
-import { OnValueChangedListener } from './Dropdown';
-const { dialogs } = require('../utils/dialogs.js');
+import { themeStyle } from '../global-style';
+import { OnValueChangedListener } from '../Dropdown';
+const { dialogs } = require('../../utils/dialogs.js');
 const DialogBox = require('react-native-dialogbox').default;
-import { localSyncInfoFromState } from '@joplin/lib/services/synchronizer/syncInfoUtils';
-import { showMissingMasterKeyMessage } from '@joplin/lib/services/e2ee/utils';
 import { FolderEntity } from '@joplin/lib/services/database/types';
 import { State } from '@joplin/lib/reducer';
-import CustomButton from './CustomButton';
-import FolderPicker from './FolderPicker';
+import CustomButton from '../CustomButton';
+import FolderPicker from '../FolderPicker';
 import { itemIsInTrash } from '@joplin/lib/services/trash';
 import restoreItems from '@joplin/lib/services/trash/restoreItems';
 import { ModelType } from '@joplin/lib/BaseModel';
 import { PluginStates } from '@joplin/lib/services/plugins/reducer';
 import { ContainerType } from '@joplin/lib/services/plugins/WebviewController';
 import { Dispatch } from 'redux';
+import WarningBanner from './WarningBanner';
 
 // We need this to suppress the useless warning
 // https://github.com/oblador/react-native-vector-icons/issues/1465
@@ -41,10 +38,6 @@ const PADDING_V = 10;
 
 type OnSelectCallbackType=()=> void;
 type OnPressCallback=()=> void;
-interface NavButtonPressEvent {
-	// Name of the screen to navigate to
-	screen: string;
-}
 
 export interface MenuOptionType {
 	onPress: OnPressCallback;
@@ -90,12 +83,7 @@ interface ScreenHeaderProps {
 	showSaveButton?: boolean;
 
 	historyCanGoBack?: boolean;
-	showMissingMasterKeyMessage?: boolean;
-	hasDisabledSyncItems?: boolean;
-	hasDisabledEncryptionItems?: boolean;
-	shouldUpgradeSyncTarget?: boolean;
 	showShouldUpgradeSyncTargetMessage?: boolean;
-	mustUpgradeAppMessage: string;
 
 	themeId: number;
 }
@@ -210,11 +198,6 @@ class ScreenHeaderComponent extends PureComponent<ScreenHeaderProps, ScreenHeade
 				paddingTop: 15,
 				paddingBottom: 15,
 			},
-			warningBox: {
-				backgroundColor: '#ff9900',
-				flexDirection: 'row',
-				padding: theme.marginLeft,
-			},
 		};
 
 		styleObject.contextMenuItemTextDisabled = {
@@ -312,18 +295,6 @@ class ScreenHeaderComponent extends PureComponent<ScreenHeaderProps, ScreenHeade
 		}
 	}
 
-	private warningBox_press(event: NavButtonPressEvent) {
-		void NavService.go(event.screen);
-	}
-
-	private renderWarningBox(screen: string, message: string) {
-		return (
-			<TouchableOpacity key={screen} style={this.styles().warningBox} onPress={() => this.warningBox_press({ screen: screen })} activeOpacity={0.8}>
-				<Text style={{ flex: 1 }}>{message}</Text>
-			</TouchableOpacity>
-		);
-	}
-
 	public render() {
 		const themeId = this.props.themeId;
 		// eslint-disable-next-line @typescript-eslint/no-explicit-any -- Old code before rule was applied
@@ -640,17 +611,6 @@ class ScreenHeaderComponent extends PureComponent<ScreenHeaderProps, ScreenHeade
 			}
 		};
 
-		const warningComps = [];
-
-		if (this.props.showMissingMasterKeyMessage) warningComps.push(this.renderWarningBox('EncryptionConfig', _('Press to set the decryption password.')));
-		if (this.props.hasDisabledSyncItems) warningComps.push(this.renderWarningBox('Status', _('Some items cannot be synchronised. Press for more info.')));
-		if (this.props.shouldUpgradeSyncTarget && this.props.showShouldUpgradeSyncTargetMessage !== false) warningComps.push(this.renderWarningBox('UpgradeSyncTarget', _('The sync target needs to be upgraded. Press this banner to proceed.')));
-		if (this.props.mustUpgradeAppMessage) warningComps.push(this.renderWarningBox('UpgradeApp', this.props.mustUpgradeAppMessage));
-
-		if (this.props.hasDisabledEncryptionItems) {
-			warningComps.push(this.renderWarningBox('Status', _('Some items cannot be decrypted.')));
-		}
-
 		const showSideMenuButton = !!this.props.showSideMenuButton && !this.props.noteSelectionEnabled;
 		const showSelectAllButton = this.props.noteSelectionEnabled;
 		const showSearchButton = !!this.props.showSearchButton && !this.props.noteSelectionEnabled;
@@ -724,7 +684,9 @@ class ScreenHeaderComponent extends PureComponent<ScreenHeaderProps, ScreenHeade
 					{sortButtonComp}
 					{menuComp}
 				</View>
-				{warningComps}
+				<WarningBanner
+					showShouldUpgradeSyncTargetMessage={this.props.showShouldUpgradeSyncTargetMessage}
+				/>
 				<DialogBox
 					ref={(dialogbox: typeof DialogBox) => {
 						this.dialogbox = dialogbox;
@@ -740,22 +702,15 @@ class ScreenHeaderComponent extends PureComponent<ScreenHeaderProps, ScreenHeade
 }
 
 const ScreenHeader = connect((state: State) => {
-	const syncInfo = localSyncInfoFromState(state);
-
 	return {
 		historyCanGoBack: state.historyCanGoBack,
 		locale: state.settings.locale,
 		folders: state.folders,
 		themeId: state.settings.theme,
-		hasDisabledEncryptionItems: state.hasDisabledEncryptionItems,
 		noteSelectionEnabled: state.noteSelectionEnabled,
 		selectedNoteIds: state.selectedNoteIds,
 		selectedFolderId: state.selectedFolderId,
 		notesParentType: state.notesParentType,
-		showMissingMasterKeyMessage: showMissingMasterKeyMessage(syncInfo, state.notLoadedMasterKeys),
-		hasDisabledSyncItems: state.hasDisabledSyncItems,
-		shouldUpgradeSyncTarget: state.settings['sync.upgradeState'] === Setting.SYNC_UPGRADE_STATE_SHOULD_DO,
-		mustUpgradeAppMessage: state.mustUpgradeAppMessage,
 		plugins: state.pluginService.plugins,
 	};
 })(ScreenHeaderComponent);