diff --git a/tests/components/donut-metric-card.test.tsx b/tests/components/donut-metric-card.test.tsx
index 60b93ce..166b7fb 100644
--- a/tests/components/donut-metric-card.test.tsx
+++ b/tests/components/donut-metric-card.test.tsx
@@ -4,9 +4,11 @@ import { describe, expect, it } from 'vitest';
 import { DonutMetricCard } from '../../src/components/DonutMetricCard/DonutMetricCard';
 import { donutArcPath } from '../../src/components/DonutMetricCard/donut-arc';
 
-const styles = readFileSync(new URL('../../src/styles/components.css', import.meta.url), 'utf8');
-const tileContract = readFileSync(new URL('../../src/styles/tile-contract.css', import.meta.url), 'utf8');
-const tokens = readFileSync(new URL('../../src/styles/ui-tokens.css', import.meta.url), 'utf8');
+// Line endings depend on the checkout (CRLF on Windows working copies); the contract is about content.
+const readStyle = (file: string) => readFileSync(new URL(`../../src/styles/${file}`, import.meta.url), 'utf8').replace(/\r\n/g, '\n');
+const styles = readStyle('components.css');
+const tileContract = readStyle('tile-contract.css');
+const tokens = readStyle('ui-tokens.css');
 
 describe('DonutMetricCard binding design contract', () => {
   it('renders the shared full-circle reference with a bold count above a regular percentage', () => {