diff --git a/packages/runner/src/types/runner.ts b/packages/runner/src/types/runner.ts
index e5b66b463be6..edecb67bfbba 100644
--- a/packages/runner/src/types/runner.ts
+++ b/packages/runner/src/types/runner.ts
@@ -22,10 +22,10 @@ import type {
 export interface VitestRunnerConfig {
   root: string
   setupFiles: string[]
-  name?: string
+  name: string | undefined
   passWithNoTests: boolean
-  testNamePattern?: RegExp
-  allowOnly?: boolean
+  testNamePattern: RegExp | undefined
+  allowOnly: boolean
   sequence: {
     shuffle?: boolean
     concurrent?: boolean
@@ -33,17 +33,17 @@ export interface VitestRunnerConfig {
     hooks: SequenceHooks
     setupFiles: SequenceSetupFiles
   }
-  chaiConfig?: {
+  chaiConfig: {
     truncateThreshold?: number
-  }
+  } | undefined
   maxConcurrency: number
   testTimeout: number
   hookTimeout: number
   retry: SerializableRetry
-  includeTaskLocation?: boolean
+  includeTaskLocation: boolean | undefined
   diffOptions?: DiffOptions
   tags: TestTagDefinition[]
-  tagsFilter?: string[]
+  tagsFilter: string[] | undefined
   strictTags: boolean
 }
 
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index aef360c5d8da..6201105c9113 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1315,6 +1315,15 @@ importers:
         specifier: workspace:*
         version: link:../../../../packages/vitest
 
+  test/cli/dts/exact-optional-property:
+    devDependencies:
+      '@vitest/runner':
+        specifier: workspace:*
+        version: link:../../../../packages/runner
+      vitest:
+        specifier: workspace:*
+        version: link:../../../../packages/vitest
+
   test/cli/dts/fixture-extend:
     devDependencies:
       vitest:
diff --git a/test/cli/dts/exact-optional-property/package.json b/test/cli/dts/exact-optional-property/package.json
new file mode 100644
index 000000000000..51c24416b172
--- /dev/null
+++ b/test/cli/dts/exact-optional-property/package.json
@@ -0,0 +1,12 @@
+{
+  "name": "@vitest/test-integration-dts-exact-optional-property",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "test": "tsc -b"
+  },
+  "devDependencies": {
+    "@vitest/runner": "workspace:*",
+    "vitest": "workspace:*"
+  }
+}
diff --git a/test/cli/dts/exact-optional-property/src/reporter.ts b/test/cli/dts/exact-optional-property/src/reporter.ts
new file mode 100644
index 000000000000..a0b76ae951ec
--- /dev/null
+++ b/test/cli/dts/exact-optional-property/src/reporter.ts
@@ -0,0 +1,8 @@
+import type { File } from '@vitest/runner'
+import { DefaultReporter } from 'vitest/reporters'
+
+export class MyReporter extends DefaultReporter {
+  override reportTestSummary(files: File[], errors: unknown[], leakCount: number): void {
+    super.reportTestSummary(files, errors, leakCount)
+  }
+}
diff --git a/test/cli/dts/exact-optional-property/src/runner.ts b/test/cli/dts/exact-optional-property/src/runner.ts
new file mode 100644
index 000000000000..da41cb84a9f5
--- /dev/null
+++ b/test/cli/dts/exact-optional-property/src/runner.ts
@@ -0,0 +1,4 @@
+import type { VitestRunner } from '@vitest/runner'
+import { VitestTestRunner } from 'vitest/runners'
+
+export class MyRunner extends VitestTestRunner implements VitestRunner {}
diff --git a/test/cli/dts/exact-optional-property/tsconfig.json b/test/cli/dts/exact-optional-property/tsconfig.json
new file mode 100644
index 000000000000..f41906c5b6a2
--- /dev/null
+++ b/test/cli/dts/exact-optional-property/tsconfig.json
@@ -0,0 +1,16 @@
+{
+  "extends": ["../_shared/tsconfig.patch.json"],
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "exactOptionalPropertyTypes": true,
+    "declaration": true,
+    "declarationMap": true,
+    "outDir": "dist",
+    "sourceMap": true,
+    "verbatimModuleSyntax": true,
+    "skipLibCheck": true
+  }
+}