diff --git a/packages/resume/src/stylesheet/parse.test.ts b/packages/resume/src/stylesheet/parse.test.ts
index 18e935f9a..5e56a52dd 100644
--- a/packages/resume/src/stylesheet/parse.test.ts
+++ b/packages/resume/src/stylesheet/parse.test.ts
@@ -3,12 +3,16 @@ import { parseStylesheet } from "./parse";
 
 describe("parseStylesheet", () => {
 	it("returns exact ranges for malformed declarations and keeps a recoverable parse tree", () => {
-		const result = parseStylesheet("@version 1;\nsection { color red; }\nitem { opacity: .5; }");
+		const source = "@version 1;\nsection { color red; }\nitem { opacity: .5; }";
+		const result = parseStylesheet(source);
 
 		expect(result.diagnostics[0]?.range).toEqual({
-			start: { line: 2, column: 17, offset: 31 },
-			end: { line: 2, column: 17, offset: 31 },
+			start: { line: 2, column: 17, offset: 28 },
+			end: { line: 2, column: 17, offset: 28 },
 		});
+		// Anchor the offset to the source it must point at, so a parser change that shifts it fails
+		// loudly instead of leaving line/column and offset disagreeing.
+		expect(source.slice(28, 31)).toBe("red");
 		expect(result.rules).toHaveLength(2);
 	});