diff --git a/packages/vitest/src/utils/source-map.ts b/packages/vitest/src/utils/source-map.ts
index 7bfdadb24..aa776cbee 100644
--- a/packages/vitest/src/utils/source-map.ts
+++ b/packages/vitest/src/utils/source-map.ts
@@ -2,7 +2,7 @@ import { SourceMapConsumer } from 'source-map-js'
 import type { RawSourceMap } from 'vite-node'
 import type { ErrorWithDiff, ParsedStack, Position } from '../types'
 import type { Vitest } from '../node'
-import { notNullish } from './base'
+import { notNullish, slash } from './base'
 
 export const lineSplitRE = /\r?\n/
 
@@ -58,7 +58,7 @@ export function parseStacktrace(e: ErrorWithDiff, full = false): ParsedStack[] {
       if (!match)
         return null
 
-      let file = match[2]
+      let file = slash(match[2])
       if (file.startsWith('file://'))
         file = file.slice(7)