diff --git a/packages/vitest/src/node/config/resolveConfig.ts b/packages/vitest/src/node/config/resolveConfig.ts
index b961a5308..d1e54feed 100644
--- a/packages/vitest/src/node/config/resolveConfig.ts
+++ b/packages/vitest/src/node/config/resolveConfig.ts
@@ -437,7 +437,7 @@ export function resolveConfig(
     '**\/__x00__*',
 
     '**/node_modules/**',
-  ].filter(pattern => pattern != null)
+  ].filter(pattern => typeof pattern === 'string')
 
   resolved.forceRerunTriggers = [
     ...resolved.forceRerunTriggers,