diff --git a/packages/next/src/lib/metadata/resolve-metadata.test.ts b/packages/next/src/lib/metadata/resolve-metadata.test.ts
index ceaee526fb781d..815525d93113a9 100644
--- a/packages/next/src/lib/metadata/resolve-metadata.test.ts
+++ b/packages/next/src/lib/metadata/resolve-metadata.test.ts
@@ -8,7 +8,7 @@ describe('accumulateMetadata', () => {
         [() => Promise.resolve({ description: 'child' }), null],
       ]
 
-      const metadata = await accumulateMetadata(metadataItems)
+      const metadata = await accumulateMetadata(metadataItems, undefined)
       expect(metadata).toMatchObject({
         description: 'child',
       })
@@ -22,7 +22,7 @@ describe('accumulateMetadata', () => {
         [{ title: 'layout' }, null],
         [{ title: 'page' }, null],
       ]
-      const metadata = await accumulateMetadata(metadataItems)
+      const metadata = await accumulateMetadata(metadataItems, undefined)
       expect(metadata).toMatchObject({
         title: { absolute: 'page', template: null },
       })
@@ -42,7 +42,7 @@ describe('accumulateMetadata', () => {
         [null, null], // same level layout
         [{ title: 'page' }, null],
       ]
-      const metadata = await accumulateMetadata(metadataItems)
+      const metadata = await accumulateMetadata(metadataItems, undefined)
       expect(metadata).toMatchObject({
         title: { absolute: '2nd parent layout page', template: null },
       })
diff --git a/packages/next/src/lib/metadata/resolve-metadata.ts b/packages/next/src/lib/metadata/resolve-metadata.ts
index 7418684dbdddf1..07d6b906941ab7 100644
--- a/packages/next/src/lib/metadata/resolve-metadata.ts
+++ b/packages/next/src/lib/metadata/resolve-metadata.ts
@@ -251,7 +251,7 @@ function constructMetadataBase(urlBase: string) {
 
 export async function accumulateMetadata(
   metadataItems: MetadataItems,
-  urlBase: string
+  urlBase: string | undefined
 ): Promise<ResolvedMetadata> {
   const resolvedMetadata = createDefaultMetadata()