diff --git a/src/app/__tests__/TransactionProgressModal.test.tsx b/src/app/__tests__/TransactionProgressModal.test.tsx
new file mode 100644
index 00000000..b03b11ec
--- /dev/null
+++ b/src/app/__tests__/TransactionProgressModal.test.tsx
@@ -0,0 +1,238 @@
+// @vitest-environment happy-dom
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, beforeEach, vi } from 'vitest';
+import TransactionProgressModal from '../TransactionProgressModal';
+
+// Mock TransactionStepTimeline so tests stay focused
+vi.mock('@/components/transaction/TransactionStepTimeline', () => ({
+  default: (txProps: any) => (
+    <div data-testid="transaction-timeline" data-hash={txProps.txHash} data-state={txProps.state}>
+      {(txProps.state === 'error' && txProps.txHash) && (
+        <button
+          onClick={() => txProps.onCopyHash?.(txProps.txHash)}>
+            Copy hash
+          </button>
+      )}
+    </div>
+  )
+}));
+
+describe('TransactionProgressModal', () => {
+  const mockOnClose = vi.fn();
+  const mockOnRetry = vi.fn();
+  const mockOnSuccessAction = vi.fn();
+  
+  beforeEach(() => {
+    vi.clearAllMocks();
+    // Mock clipboard
+    Object.defineProperty(navigator, 'clipboard', {
+      value: {
+        writeText: vi.fn().mockResolvedValue(undefined),
+      },
+      writable: true,
+    });
+  });
+
+  it('renders nothing when isOpen is false', () => {
+    const { container } = render(
+      <TransactionProgressModal
+        isOpen={false}
+        state="IDLE"
+        actionName="Testing"
+        onClose={mockOnClose}
+      />
+    );
+    expect(container.firstChild).toBeNull();
+  });
+
+  it('renders nothing when state is IDLE', () => {
+    const { container } = render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="IDLE"
+        actionName="Testing"
+        onClose={mockOnClose}
+      />
+    );
+    expect(container.firstChild).toBeNull();
+  });
+
+  it('renders AWAITING_SIGNATURE state correctly', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="AWAITING_SIGNATURE"
+        actionName="Testing Action"
+        onClose={mockOnClose}
+      />
+    );
+    expect(screen.getByText(/Confirm in Freighter/i)).toBeInTheDocument();
+    expect(screen.getByText(/Please sign the transaction in your wallet./i)).toBeInTheDocument();
+    const cancelButton = screen.getByText(/Cancel/i);
+    fireEvent.click(cancelButton);
+    expect(mockOnClose).toHaveBeenCalled();
+  });
+
+  it('renders SUBMITTING state correctly', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="SUBMITTING"
+        actionName="Testing Action"
+        txHash="test-hash-123"
+        onClose={mockOnClose}
+      />
+    );
+    expect(screen.getByText(/Testing Action in Progress/i)).toBeInTheDocument();
+    expect(screen.getByText(/Sending to the Stellar Network.../i)).toBeInTheDocument();
+  });
+
+  it('renders PROCESSING state correctly', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="PROCESSING"
+        actionName="Testing Action"
+        txHash="test-hash-123"
+        onClose={mockOnClose}
+      />
+    );
+    expect(screen.getByText(/Confirming Transaction/i)).toBeInTheDocument();
+  });
+
+  it('renders SUCCESS state correctly', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="SUCCESS"
+        actionName="Testing Action"
+        successMessage="Custom success message"
+        txHash="test-hash-123"
+        onClose={mockOnClose}
+        onSuccessAction={mockOnSuccessAction}
+      />
+    );
+    expect(screen.getByText(/Testing Action Successful!/i)).toBeInTheDocument();
+    expect(screen.getByText(/Custom success message/i)).toBeInTheDocument();
+    const viewDetailsButton = screen.getByText(/View Details/i);
+    fireEvent.click(viewDetailsButton);
+    expect(mockOnSuccessAction).toHaveBeenCalled();
+  });
+
+  it('calls onClose if onSuccessAction is not provided', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="SUCCESS"
+        actionName="Testing Action"
+        onClose={mockOnClose}
+      />
+    );
+    const viewDetailsButton = screen.getByText(/View Details/i);
+    fireEvent.click(viewDetailsButton);
+    expect(mockOnClose).toHaveBeenCalled();
+  });
+
+  it('copies transaction hash in ERROR state', async () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="ERROR"
+        actionName="Testing Action"
+        errorCode="UNKNOWN_ERROR"
+        txHash="test-hash-456"
+        onClose={mockOnClose}
+      />
+    );
+    const copyButton = screen.getByText(/Copy hash/i);
+    await fireEvent.click(copyButton);
+    expect(navigator.clipboard.writeText).toHaveBeenCalledWith('test-hash-456');
+  });
+
+  it('handles clipboard rejection gracefully', async () => {
+    (navigator.clipboard.writeText as vi.Mock).mockRejectedValueOnce(new Error('Clipboard error'));
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="ERROR"
+        actionName="Testing Action"
+        errorCode="UNKNOWN_ERROR"
+        txHash="test-hash-789"
+        onClose={mockOnClose}
+      />
+    );
+    const copyButton = screen.getByText(/Copy hash/i);
+    await fireEvent.click(copyButton);
+    expect(navigator.clipboard.writeText).toHaveBeenCalledWith('test-hash-789');
+  });
+
+  it('does not throw when txHash is missing', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="SUCCESS"
+        actionName="Testing Action"
+        onClose={mockOnClose}
+      />
+    );
+    expect(screen.queryByText(/Copy hash/i)).not.toBeInTheDocument();
+  });
+
+  it('renders ERROR state correctly', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="ERROR"
+        actionName="Testing Action"
+        errorCode="USER_REJECTED"
+        onClose={mockOnClose}
+        onRetry={mockOnRetry}
+      />
+    );
+    expect(screen.getByText(/Transaction Failed/i)).toBeInTheDocument();
+    const tryAgainButton = screen.getByText(/Try Again/i);
+    fireEvent.click(tryAgainButton);
+    expect(mockOnRetry).toHaveBeenCalled();
+  });
+
+  it('renders UNKNOWN_ERROR by default', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="ERROR"
+        actionName="Testing Action"
+        onClose={mockOnClose}
+        onRetry={mockOnRetry}
+      />
+    );
+    expect(screen.getByText(/Unexpected Error/i)).toBeInTheDocument();
+  });
+
+  it('renders RPC_TIMEOUT error correctly', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="ERROR"
+        actionName="Testing Action"
+        errorCode="RPC_TIMEOUT"
+        txHash="test-hash"
+        onClose={mockOnClose}
+      />
+    );
+    expect(screen.getByText(/Network Timeout/i)).toBeInTheDocument();
+  });
+
+  it('calls onClose when close button is clicked', () => {
+    render(
+      <TransactionProgressModal
+        isOpen={true}
+        state="AWAITING_SIGNATURE"
+        actionName="Testing Action"
+        onClose={mockOnClose}
+      />
+    );
+    const closeButton = screen.getByRole('button', { name: /Close modal/i });
+    fireEvent.click(closeButton);
+    expect(mockOnClose).toHaveBeenCalled();
+  });
+});