diff --git a/packages/vitest/src/node/types/benchmark.ts b/packages/vitest/src/node/types/benchmark.ts
index 27abfcca3..604c5e2e0 100644
--- a/packages/vitest/src/node/types/benchmark.ts
+++ b/packages/vitest/src/node/types/benchmark.ts
@@ -55,5 +55,5 @@ export interface BenchmarkUserOptions {
 }
 
 export type ResolvedBenchmarkOptions = Omit<Required<BenchmarkUserOptions>, 'provider'> & {
-  provider?: string | undefined
+  provider?: string
 }
diff --git a/packages/vitest/src/node/types/config.ts b/packages/vitest/src/node/types/config.ts
index c97af93ea..3e93b5548 100644
--- a/packages/vitest/src/node/types/config.ts
+++ b/packages/vitest/src/node/types/config.ts
@@ -1313,7 +1313,7 @@ export interface ResolvedConfig
 
   maxWorkers: number
 
-  vmMemoryLimit?: UserConfig['vmMemoryLimit']
+  vmMemoryLimit?: string | number
   dumpDir?: string
   tagsFilter?: string[]
   mergeReportsLabel?: string