diff --git a/packages/svelte/tests/sourcemaps/test.ts b/packages/svelte/tests/sourcemaps/test.ts
index e534146a3a..ed5375ed55 100644
--- a/packages/svelte/tests/sourcemaps/test.ts
+++ b/packages/svelte/tests/sourcemaps/test.ts
@@ -100,10 +100,12 @@ const { test, run } = suite<SourcemapTest>(async (config, cwd) => {
 		Decoded sourcemap mappings contain absolute line/column numbers.
 		Negative values are invalid and can cause errors in downstream processing
 		*/
-		for(let l = 0; l < decoded.length; l++) {
-			for(let m of decoded[l]) {
-				if(m.find(i => i < 0)) {
-					throw new Error(`Invalid mapping with negative value ${JSON.stringify(m)} at line ${l} of the decoded mappings of ${info} sourcemap\n${JSON.stringify(map)}`)
+		for (let l = 0; l < decoded.length; l++) {
+			for (let m of decoded[l]) {
+				if (m.find((i) => i < 0)) {
+					throw new Error(
+						`Invalid mapping with negative value ${JSON.stringify(m)} at line ${l} of the decoded mappings of ${info} sourcemap\n${JSON.stringify(map)}`
+					);
 				}
 			}
 		}