diff --git a/src/design-system/composites/ConfirmDialog/ConfirmDialog.test.tsx b/src/design-system/composites/ConfirmDialog/ConfirmDialog.test.tsx
new file mode 100644
index 0000000..f554d9a
--- /dev/null
+++ b/src/design-system/composites/ConfirmDialog/ConfirmDialog.test.tsx
@@ -0,0 +1,113 @@
+import { describe, it, expect, vi } from 'vitest'
+import { render, screen, waitFor } from '@testing-library/react'
+import userEvent from '@testing-library/user-event'
+import { ConfirmDialog } from './ConfirmDialog'
+
+const defaultProps = {
+  open: true,
+  onClose: vi.fn(),
+  onConfirm: vi.fn(),
+  message: 'Delete user "alice"? This cannot be undone.',
+  confirmText: 'alice',
+}
+
+describe('ConfirmDialog', () => {
+  it('renders title and message when open', () => {
+    render(<ConfirmDialog {...defaultProps} />)
+    expect(screen.getByText('Confirm Deletion')).toBeInTheDocument()
+    expect(screen.getByText('Delete user "alice"? This cannot be undone.')).toBeInTheDocument()
+  })
+
+  it('does not render when closed', () => {
+    render(<ConfirmDialog {...defaultProps} open={false} />)
+    expect(screen.queryByText('Confirm Deletion')).not.toBeInTheDocument()
+  })
+
+  it('renders custom title', () => {
+    render(<ConfirmDialog {...defaultProps} title="Remove item" />)
+    expect(screen.getByText('Remove item')).toBeInTheDocument()
+  })
+
+  it('shows confirm instruction text', () => {
+    render(<ConfirmDialog {...defaultProps} />)
+    expect(screen.getByText(/Type "alice" to confirm/)).toBeInTheDocument()
+  })
+
+  it('disables confirm button until text matches', () => {
+    render(<ConfirmDialog {...defaultProps} />)
+    expect(screen.getByRole('button', { name: 'Delete' })).toBeDisabled()
+  })
+
+  it('enables confirm button when text matches', async () => {
+    const user = userEvent.setup()
+    render(<ConfirmDialog {...defaultProps} />)
+    await user.type(screen.getByRole('textbox'), 'alice')
+    expect(screen.getByRole('button', { name: 'Delete' })).toBeEnabled()
+  })
+
+  it('calls onConfirm when confirm button is clicked after typing', async () => {
+    const onConfirm = vi.fn()
+    const user = userEvent.setup()
+    render(<ConfirmDialog {...defaultProps} onConfirm={onConfirm} />)
+    await user.type(screen.getByRole('textbox'), 'alice')
+    await user.click(screen.getByRole('button', { name: 'Delete' }))
+    expect(onConfirm).toHaveBeenCalledOnce()
+  })
+
+  it('calls onClose when cancel button is clicked', async () => {
+    const onClose = vi.fn()
+    const user = userEvent.setup()
+    render(<ConfirmDialog {...defaultProps} onClose={onClose} />)
+    await user.click(screen.getByRole('button', { name: 'Cancel' }))
+    expect(onClose).toHaveBeenCalledOnce()
+  })
+
+  it('calls onConfirm on Enter when text matches', async () => {
+    const onConfirm = vi.fn()
+    const user = userEvent.setup()
+    render(<ConfirmDialog {...defaultProps} onConfirm={onConfirm} />)
+    await user.type(screen.getByRole('textbox'), 'alice')
+    await user.keyboard('{Enter}')
+    expect(onConfirm).toHaveBeenCalledOnce()
+  })
+
+  it('does not call onConfirm on Enter when text does not match', async () => {
+    const onConfirm = vi.fn()
+    const user = userEvent.setup()
+    render(<ConfirmDialog {...defaultProps} onConfirm={onConfirm} />)
+    await user.type(screen.getByRole('textbox'), 'alic')
+    await user.keyboard('{Enter}')
+    expect(onConfirm).not.toHaveBeenCalled()
+  })
+
+  it('disables both buttons when loading', async () => {
+    const user = userEvent.setup()
+    render(<ConfirmDialog {...defaultProps} loading />)
+    await user.type(screen.getByRole('textbox'), 'alice')
+    const buttons = screen.getAllByRole('button')
+    for (const btn of buttons) {
+      expect(btn).toBeDisabled()
+    }
+  })
+
+  it('clears input when opened', async () => {
+    const { rerender } = render(<ConfirmDialog {...defaultProps} open={false} />)
+    rerender(<ConfirmDialog {...defaultProps} open={true} />)
+    await waitFor(() => {
+      expect(screen.getByRole('textbox')).toHaveValue('')
+    })
+  })
+
+  it('auto-focuses input on open', async () => {
+    render(<ConfirmDialog {...defaultProps} />)
+    await waitFor(() => {
+      expect(screen.getByRole('textbox')).toHaveFocus()
+    })
+  })
+
+  it('renders custom button labels', () => {
+    render(<ConfirmDialog {...defaultProps} confirmLabel="Remove" cancelLabel="Keep" />)
+    expect(screen.getByRole('button', { name: 'Remove' })).toBeInTheDocument()
+    expect(screen.getByRole('button', { name: 'Keep' })).toBeInTheDocument()
+  })
+})