diff --git a/src/components/__tests__/BlockChip.test.tsx b/src/components/__tests__/BlockChip.test.tsx
new file mode 100644
index 0000000..498bab8
--- /dev/null
+++ b/src/components/__tests__/BlockChip.test.tsx
@@ -0,0 +1,221 @@
+import React from 'react';
+import { StyleSheet } from 'react-native';
+import { render, fireEvent } from '@testing-library/react-native';
+import BlockChip from '../BlockChip';
+import { useThemeColors } from '../../utils/useThemeColors';
+import { Colors, Spacing, BorderRadius, FontSize } from '../../utils/theme';
+
+jest.mock('../../utils/useThemeColors', () => ({
+  useThemeColors: jest.fn(),
+}));
+
+const mockUseThemeColors = useThemeColors as jest.Mock;
+
+describe('BlockChip', () => {
+  const mockOnPress = jest.fn();
+
+  const defaultProps = {
+    name: 'Deep Work',
+    categoryColor: '#3B82F6',
+    categoryEmoji: 'briefcase',
+    durationHours: 2,
+    done: false,
+    onPress: mockOnPress,
+  };
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    mockUseThemeColors.mockReturnValue({ colors: Colors.light, isDark: false });
+  });
+
+  const getCategoryIcon = (tree: any) => tree.children[0];
+
+  const getNameRow = (tree: any) => tree.children[1].children[0];
+
+  const getDurationText = (tree: any) => tree.children[2];
+
+  describe('rendering and content', () => {
+    it('renders block name and formatted duration hours', async () => {
+      const { getByText } = await render(<BlockChip {...defaultProps} />);
+
+      expect(getByText('Deep Work')).toBeTruthy();
+      expect(getByText('2h')).toBeTruthy();
+    });
+
+    it('enforces single line on name', async () => {
+      const { getByText } = await render(<BlockChip {...defaultProps} />);
+      const nameElement = getByText('Deep Work');
+
+      expect(nameElement.props.numberOfLines).toBe(1);
+    });
+
+    it('formats decimal duration hours correctly', async () => {
+      const { getByText } = await render(<BlockChip {...defaultProps} durationHours={1.5} />);
+
+      expect(getByText('1.5h')).toBeTruthy();
+    });
+
+    it('applies container chip styles and category border/background colors', async () => {
+      const { toJSON } = await render(<BlockChip {...defaultProps} />);
+      const tree = toJSON() as any;
+      const chipStyle = StyleSheet.flatten(tree.props.style);
+
+      expect(chipStyle.flexDirection).toBe('row');
+      expect(chipStyle.alignItems).toBe('center');
+      expect(chipStyle.borderLeftWidth).toBe(4);
+      expect(chipStyle.borderRadius).toBe(BorderRadius.sm);
+      expect(chipStyle.paddingVertical).toBe(Spacing.xs);
+      expect(chipStyle.paddingHorizontal).toBe(Spacing.sm);
+      expect(chipStyle.marginBottom).toBe(Spacing.xs);
+      expect(chipStyle.borderLeftColor).toBe('#3B82F6');
+      expect(chipStyle.backgroundColor).toBe('#3B82F620');
+      expect(chipStyle.opacity).toBe(1);
+    });
+
+    it('renders category icon with category color and expected size', async () => {
+      const { toJSON } = await render(<BlockChip {...defaultProps} />);
+      const icon = getCategoryIcon(toJSON());
+
+      expect(icon.props.style).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({ color: '#3B82F6', fontSize: 16 }),
+          expect.objectContaining({ fontFamily: 'material-community' }),
+        ])
+      );
+    });
+  });
+
+  describe('done state', () => {
+    it('renders with full opacity, no checkmark, and normal text when done is false', async () => {
+      const { toJSON, getByText } = await render(<BlockChip {...defaultProps} done={false} />);
+      const tree = toJSON() as any;
+      const chipStyle = StyleSheet.flatten(tree.props.style);
+      expect(chipStyle.opacity).toBe(1);
+
+      const nameRow = getNameRow(tree);
+      expect(nameRow.children.length).toBe(1);
+
+      const nameStyle = StyleSheet.flatten(getByText('Deep Work').props.style);
+      expect(nameStyle.textDecorationLine).toBeUndefined();
+    });
+
+    it('renders with reduced opacity, check-bold icon, and strikethrough text when done is true', async () => {
+      const { toJSON, getByText } = await render(<BlockChip {...defaultProps} done={true} />);
+      const tree = toJSON() as any;
+      const chipStyle = StyleSheet.flatten(tree.props.style);
+      expect(chipStyle.opacity).toBe(0.5);
+
+      const nameRow = getNameRow(tree);
+      expect(nameRow.children.length).toBe(2);
+
+      const checkIcon = nameRow.children[0];
+      expect(checkIcon.props.style).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({ color: Colors.light.success, fontSize: 16 }),
+          expect.objectContaining({ fontFamily: 'material-community' }),
+        ])
+      );
+
+      const nameStyle = StyleSheet.flatten(getByText('Deep Work').props.style);
+      expect(nameStyle.textDecorationLine).toBe('line-through');
+    });
+  });
+
+  describe('description prop', () => {
+    it('renders description text with single line limit and italic font style when provided', async () => {
+      const { getByText } = await render(
+        <BlockChip {...defaultProps} description="Focused coding sprint" />
+      );
+      const descElement = getByText('Focused coding sprint');
+
+      expect(descElement).toBeTruthy();
+      expect(descElement.props.numberOfLines).toBe(1);
+      const descStyle = StyleSheet.flatten(descElement.props.style);
+      expect(descStyle.fontStyle).toBe('italic');
+      expect(descStyle.fontSize).toBe(FontSize.xs);
+      expect(descStyle.color).toBe(Colors.light.textSecondary);
+    });
+
+    it('does not render description when description is omitted', async () => {
+      const { toJSON } = await render(<BlockChip {...defaultProps} />);
+      const tree = toJSON() as any;
+      const nameContainer = tree.children[1];
+
+      expect(nameContainer.children.length).toBe(1);
+    });
+
+    it('does not render description when description is empty string', async () => {
+      const { toJSON } = await render(<BlockChip {...defaultProps} description="" />);
+      const tree = toJSON() as any;
+      const nameContainer = tree.children[1];
+
+      expect(nameContainer.children.length).toBe(1);
+    });
+  });
+
+  describe('user interactions', () => {
+    it('calls onPress when chip is pressed', async () => {
+      const { root } = await render(<BlockChip {...defaultProps} />);
+
+      await fireEvent.press(root!);
+      expect(mockOnPress).toHaveBeenCalledTimes(1);
+    });
+
+    it('calls onPress when pressing the block name text', async () => {
+      const { getByText } = await render(<BlockChip {...defaultProps} />);
+
+      await fireEvent.press(getByText('Deep Work'));
+      expect(mockOnPress).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('theming', () => {
+    it('applies light theme text colors', async () => {
+      mockUseThemeColors.mockReturnValue({ colors: Colors.light, isDark: false });
+
+      const { toJSON, getByText } = await render(
+        <BlockChip {...defaultProps} done={true} description="Light task" />
+      );
+      const tree = toJSON() as any;
+
+      const nameStyle = StyleSheet.flatten(getByText('Deep Work').props.style);
+      expect(nameStyle.color).toBe(Colors.light.text);
+
+      const descStyle = StyleSheet.flatten(getByText('Light task').props.style);
+      expect(descStyle.color).toBe(Colors.light.textSecondary);
+
+      const durationNode = getDurationText(tree);
+      const durationStyle = StyleSheet.flatten(durationNode.props.style);
+      expect(durationStyle.color).toBe(Colors.light.textSecondary);
+
+      const checkIcon = getNameRow(tree).children[0];
+      expect(checkIcon.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.light.success })])
+      );
+    });
+
+    it('applies dark theme text colors', async () => {
+      mockUseThemeColors.mockReturnValue({ colors: Colors.dark, isDark: true });
+
+      const { toJSON, getByText } = await render(
+        <BlockChip {...defaultProps} done={true} description="Dark task" />
+      );
+      const tree = toJSON() as any;
+
+      const nameStyle = StyleSheet.flatten(getByText('Deep Work').props.style);
+      expect(nameStyle.color).toBe(Colors.dark.text);
+
+      const descStyle = StyleSheet.flatten(getByText('Dark task').props.style);
+      expect(descStyle.color).toBe(Colors.dark.textSecondary);
+
+      const durationNode = getDurationText(tree);
+      const durationStyle = StyleSheet.flatten(durationNode.props.style);
+      expect(durationStyle.color).toBe(Colors.dark.textSecondary);
+
+      const checkIcon = getNameRow(tree).children[0];
+      expect(checkIcon.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.dark.success })])
+      );
+    });
+  });
+});