diff --git a/webapp/packages/core-blocks/src/Cell.test.tsx b/webapp/packages/core-blocks/src/Cell.test.tsx
new file mode 100644
index 0000000000..0aeeb2f9c2
--- /dev/null
+++ b/webapp/packages/core-blocks/src/Cell.test.tsx
@@ -0,0 +1,59 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2024 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+import { waitFor } from '@testing-library/react';
+
+import { createApp, renderInApp } from '@cloudbeaver/tests-runner';
+
+import { Cell } from './Cell';
+
+const app = createApp();
+
+describe('Cell', () => {
+  it('should render children correctly', async () => {
+    const { getByText } = renderInApp(<Cell>Test Children</Cell>, app);
+    const text = await waitFor(() => getByText('Test Children'));
+
+    expect(text).toBeInTheDocument();
+  });
+
+  it('should render before element correctly', async () => {
+    const { getByText } = renderInApp(<Cell before={<span>Before Element</span>}>Test Children</Cell>, app);
+
+    const beforeText = await waitFor(() => getByText('Before Element'));
+    expect(beforeText).toBeInTheDocument();
+  });
+
+  it('should render after element correctly', async () => {
+    const { getByText } = renderInApp(<Cell after={<span>After Element</span>}>Test Children</Cell>, app);
+
+    const afterText = await waitFor(() => getByText('After Element'));
+    expect(afterText).toBeInTheDocument();
+  });
+
+  it('should render after and before elements correctly', async () => {
+    const { getByText } = renderInApp(
+      <Cell before={<span>Before Element</span>} after={<span>After Element</span>}>
+        Test Children
+      </Cell>,
+      app,
+    );
+
+    const afterText = await waitFor(() => getByText('After Element'));
+    const beforeText = await waitFor(() => getByText('Before Element'));
+
+    expect(beforeText).toBeInTheDocument();
+    expect(afterText).toBeInTheDocument();
+  });
+
+  it('should render description element correctly', async () => {
+    const { getByText } = renderInApp(<Cell description={<span>Description Element</span>}>Test Children</Cell>, app);
+
+    const description = await waitFor(() => getByText('Description Element'));
+    expect(description).toBeInTheDocument();
+  });
+});
diff --git a/webapp/packages/core-blocks/src/Link.test.tsx b/webapp/packages/core-blocks/src/Link.test.tsx
new file mode 100644
index 0000000000..00547c4cc3
--- /dev/null
+++ b/webapp/packages/core-blocks/src/Link.test.tsx
@@ -0,0 +1,63 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2024 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+import { fireEvent, queryByAttribute, waitFor } from '@testing-library/react';
+
+import { createApp, renderInApp } from '@cloudbeaver/tests-runner';
+
+import { Link } from './Link';
+
+const app = createApp();
+
+describe('Link', () => {
+  it('should render link and children correctly', async () => {
+    const { getByText } = renderInApp(<Link href="#">Test Link</Link>, app);
+    const linkElement = await waitFor(() => getByText('Test Link'));
+
+    expect(linkElement.tagName).toBe('A');
+    expect(linkElement).toBeInTheDocument();
+  });
+
+  it('should display the indicator icon when indicator is true', async () => {
+    const { container } = renderInApp(
+      <Link href="#" indicator>
+        Test Link
+      </Link>,
+      app,
+    );
+
+    const icon = await waitFor(() => queryByAttribute('href', container, /external-link/i));
+    expect(icon).toBeInTheDocument();
+  });
+
+  it('should apply the className correctly', async () => {
+    const { getByText } = renderInApp(
+      <Link href="#" className="custom-class">
+        Test Link
+      </Link>,
+      app,
+    );
+
+    const linkContainer = await waitFor(() => getByText('Test Link').closest('div'));
+    expect(linkContainer).toHaveClass('custom-class');
+  });
+
+  it('should handle onClick event', async () => {
+    const handleClick = jest.fn();
+    const { getByText } = renderInApp(
+      <Link href="#" onClick={handleClick}>
+        Test Link
+      </Link>,
+      app,
+    );
+
+    const linkElement = await waitFor(() => getByText('Test Link'));
+    fireEvent.click(linkElement);
+
+    expect(handleClick).toHaveBeenCalled();
+  });
+});
diff --git a/webapp/packages/core-blocks/src/StatusMessage.test.tsx b/webapp/packages/core-blocks/src/StatusMessage.test.tsx
new file mode 100644
index 0000000000..e04f56f8a3
--- /dev/null
+++ b/webapp/packages/core-blocks/src/StatusMessage.test.tsx
@@ -0,0 +1,64 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2024 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+import { fireEvent, queryByAttribute, waitFor } from '@testing-library/react';
+
+import { coreDialogsManifest } from '@cloudbeaver/core-dialogs';
+import { ENotificationType } from '@cloudbeaver/core-events';
+import { coreLocalizationManifest } from '@cloudbeaver/core-localization';
+import { createApp, renderInApp } from '@cloudbeaver/tests-runner';
+
+import { StatusMessage } from './StatusMessage';
+
+const app = createApp(coreLocalizationManifest, coreDialogsManifest);
+
+describe('StatusMessage', () => {
+  it('should display an error icon and message when type is error', async () => {
+    const message = 'test_error';
+    const { container, getByTitle } = renderInApp(<StatusMessage message={message} type={ENotificationType.Error} />, app);
+    const title = await waitFor(() => getByTitle(message));
+    const icon = await waitFor(() => queryByAttribute('src', container, /error/i));
+
+    expect(title).toBeInTheDocument();
+    expect(icon).toBeInTheDocument();
+  });
+
+  it('should display a success icon and message when type is success', async () => {
+    const message = 'test_success';
+    const { container, getByTitle } = renderInApp(<StatusMessage message={message} type={ENotificationType.Success} />, app);
+    const title = await waitFor(() => getByTitle(message));
+    const icon = await waitFor(() => queryByAttribute('src', container, /success/i));
+
+    expect(title).toBeInTheDocument();
+    expect(icon).toBeInTheDocument();
+  });
+
+  it('should display an error message when no message is provided', async () => {
+    const { getByText } = renderInApp(<StatusMessage exception={new Error('Test error')} />, app);
+    const message = await waitFor(() => getByText('Test error'));
+
+    expect(message).toBeInTheDocument();
+  });
+
+  it('should call onShowDetails when link is clicked', async () => {
+    const onShowDetails = jest.fn();
+    const message = 'test_message_with_details';
+    const { getByText } = renderInApp(<StatusMessage message={message} onShowDetails={onShowDetails} />, app);
+    const link = await waitFor(() => getByText(message));
+
+    fireEvent.click(link);
+    expect(onShowDetails).toHaveBeenCalled();
+  });
+
+  it('should display multiple messages joined by comma', async () => {
+    const messages = ['message_one', 'message_two'];
+    const { getByText } = renderInApp(<StatusMessage message={messages} />, app);
+    const message = await waitFor(() => getByText('message_one, message_two'));
+
+    expect(message).toBeInTheDocument();
+  });
+});
diff --git a/webapp/packages/core-blocks/src/Text.test.tsx b/webapp/packages/core-blocks/src/Text.test.tsx
new file mode 100644
index 0000000000..31cf85b16e
--- /dev/null
+++ b/webapp/packages/core-blocks/src/Text.test.tsx
@@ -0,0 +1,40 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2024 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+import { waitFor } from '@testing-library/react';
+
+import { createApp, renderInApp } from '@cloudbeaver/tests-runner';
+
+import { Text } from './Text';
+
+const app = createApp();
+
+describe('Text Component', () => {
+  it('renders children correctly', async () => {
+    const { getByText } = renderInApp(<Text>Hello World</Text>, app);
+    const text = await waitFor(() => getByText('Hello World'));
+    expect(text).toBeInTheDocument();
+  });
+
+  it('applies custom className', () => {
+    const { container } = renderInApp(<Text className="custom-class">Hello World</Text>, app);
+    expect(container.getElementsByClassName('custom-class')).toHaveLength(1);
+  });
+
+  it('passes HTML attributes correctly', () => {
+    const { container } = renderInApp(
+      <Text id="custom-id" data-testid="custom-testid">
+        Hello World
+      </Text>,
+      app,
+    );
+
+    const div = container.firstChild;
+    expect(div).toHaveAttribute('id', 'custom-id');
+    expect(div).toHaveAttribute('data-testid', 'custom-testid');
+  });
+});
diff --git a/webapp/packages/core-blocks/src/Text.tsx b/webapp/packages/core-blocks/src/Text.tsx
index 38289b0faf..83b7e8b138 100644
--- a/webapp/packages/core-blocks/src/Text.tsx
+++ b/webapp/packages/core-blocks/src/Text.tsx
@@ -7,8 +7,6 @@
  */
 import { observer } from 'mobx-react-lite';
 
-interface Props extends React.HTMLAttributes<HTMLDivElement> {}
-
-export const Text: React.FC<Props> = observer(function Text({ children, ...rest }) {
+export const Text: React.FC<React.HTMLAttributes<HTMLDivElement>> = observer(function Text({ children, ...rest }) {
   return <div {...rest}>{children}</div>;
 });
diff --git a/webapp/packages/core-blocks/src/TextPlaceholder.test.tsx b/webapp/packages/core-blocks/src/TextPlaceholder.test.tsx
new file mode 100644
index 0000000000..2e7a55f07c
--- /dev/null
+++ b/webapp/packages/core-blocks/src/TextPlaceholder.test.tsx
@@ -0,0 +1,27 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2024 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+import { waitFor } from '@testing-library/react';
+
+import { createApp, renderInApp } from '@cloudbeaver/tests-runner';
+
+import { TextPlaceholder } from './TextPlaceholder';
+
+const app = createApp();
+
+describe('TextPlaceholder Component', () => {
+  it('renders children correctly', async () => {
+    const { getByText } = renderInApp(<TextPlaceholder>Hello World</TextPlaceholder>, app);
+    const text = await waitFor(() => getByText('Hello World'));
+    expect(text).toBeInTheDocument();
+  });
+
+  it('applies custom className', () => {
+    const { container } = renderInApp(<TextPlaceholder className="custom-class">Hello World</TextPlaceholder>, app);
+    expect(container.getElementsByClassName('custom-class')).toHaveLength(1);
+  });
+});
diff --git a/webapp/packages/core-blocks/src/TimerIcon.test.tsx b/webapp/packages/core-blocks/src/TimerIcon.test.tsx
new file mode 100644
index 0000000000..a596842d04
--- /dev/null
+++ b/webapp/packages/core-blocks/src/TimerIcon.test.tsx
@@ -0,0 +1,42 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2024 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+import { queryByAttribute, waitFor } from '@testing-library/react';
+
+import { createApp, renderInApp } from '@cloudbeaver/tests-runner';
+
+import { TimerIcon } from './TimerIcon';
+
+const app = createApp();
+
+describe('TimerIcon', () => {
+  it('renders correctly with state "play" and interval 30', async () => {
+    const { getByText, container } = renderInApp(<TimerIcon state="play" interval={30} />, app);
+    const text = await waitFor(() => getByText('30'));
+    const name = await waitFor(() => queryByAttribute('href', container, '/icons/timer-play_m.svg#root'));
+
+    expect(name).toBeInTheDocument();
+    expect(text).toBeInTheDocument();
+  });
+
+  it('renders correctly with state "stop" and interval 60', async () => {
+    const { getByText, container } = renderInApp(<TimerIcon state="stop" interval={60} />, app);
+    const text = await waitFor(() => getByText('60'));
+    const name = await waitFor(() => queryByAttribute('href', container, '/icons/timer-stop_m.svg#root'));
+
+    expect(name).toBeInTheDocument();
+    expect(text).toBeInTheDocument();
+  });
+
+  it('passes HTML attributes correctly', () => {
+    const { container } = renderInApp(<TimerIcon state="play" interval={30} id="custom-id" data-testid="custom-testid" />, app);
+
+    const div = container.firstChild;
+    expect(div).toHaveAttribute('id', 'custom-id');
+    expect(div).toHaveAttribute('data-testid', 'custom-testid');
+  });
+});
diff --git a/webapp/packages/core-blocks/src/TimerIcon.tsx b/webapp/packages/core-blocks/src/TimerIcon.tsx
index f87620d475..0de5860e34 100644
--- a/webapp/packages/core-blocks/src/TimerIcon.tsx
+++ b/webapp/packages/core-blocks/src/TimerIcon.tsx
@@ -10,7 +10,7 @@ import type React from 'react';
 
 import { Icon } from './Icon';
 import { s } from './s';
-import style from './TimerIcon.module.css';
+import classes from './TimerIcon.module.css';
 import { useS } from './useS';
 
 interface Props {
@@ -19,7 +19,7 @@ interface Props {
 }
 
 export const TimerIcon = observer<Props & React.ButtonHTMLAttributes<HTMLDivElement>>(function TimerIcon({ state, interval, ...rest }) {
-  const styles = useS(style);
+  const styles = useS(classes);
 
   return (
     <div className={s(styles, { timer: true })} {...rest}>