diff --git a/packages/cloudflare-worker-mock/src/index.ts b/packages/cloudflare-worker-mock/src/index.ts
index 6eb6534..665bbb7 100644
--- a/packages/cloudflare-worker-mock/src/index.ts
+++ b/packages/cloudflare-worker-mock/src/index.ts
@@ -96,9 +96,13 @@ export function makeCloudflareWorkerKVEnv(
       return Promise.resolve(undefined);
     },
     list(
-      _prefix: string,
-      _limit: number,
-      _cursor: string,
+      _params:
+        | {
+            prefix?: string | undefined;
+            limit?: number | undefined;
+            cursor?: string | undefined;
+          }
+        | undefined,
     ): Promise<CloudflareWorkerKVList> {
       return Promise.resolve({
         cursor: '1234567890',
diff --git a/packages/types-cloudflare-worker/src/global.ts b/packages/types-cloudflare-worker/src/global.ts
index 62b59a0..658e38a 100644
--- a/packages/types-cloudflare-worker/src/global.ts
+++ b/packages/types-cloudflare-worker/src/global.ts
@@ -665,11 +665,11 @@ export interface CloudflareWorkerKV {
    *    cursor: "6Ck1la0VxJ0djhidm1MdX2FyD"
    *  }
    */
-  list(
-    prefix?: string,
-    limit?: number,
-    cursor?: string,
-  ): Promise<CloudflareWorkerKVList>;
+  list(params?: {
+    prefix?: string;
+    limit?: number;
+    cursor?: string;
+  }): Promise<CloudflareWorkerKVList>;
 }
 
 /**
diff --git a/src/helloworkerclass.ts b/src/helloworkerclass.ts
index cfd587d..997f2ef 100644
--- a/src/helloworkerclass.ts
+++ b/src/helloworkerclass.ts
@@ -60,9 +60,10 @@ export class HelloWorkerClass {
       const country = request.cf.country;
       countryCodeKV.put(country, '!', { expiration: 100 });
       const countryCode = await countryCodeKV.get(country);
+      const countryList = await countryCodeKV.list({ prefix: 'countries' });
 
       response = new Response(
-        `${body} ${request.cf.country} ${countryCode}!`,
+        `${body} ${request.cf.country} ${countryCode} ${countryList.keys[0].name}!`,
         this.responseInit,
       );
     }
diff --git a/test/helloworker.test.ts b/test/helloworker.test.ts
index 2a448f1..ca1bac4 100644
--- a/test/helloworker.test.ts
+++ b/test/helloworker.test.ts
@@ -44,6 +44,7 @@ limitations under the License.
 import {
   CloudflareWorkerGlobalScope,
   CloudflareWorkerKVOptions,
+  CloudflareWorkerKVList,
 } from 'types-cloudflare-worker';
 declare var self: CloudflareWorkerGlobalScope;
 
@@ -82,7 +83,7 @@ describe('helloworker', () => {
       return Promise.resolve(undefined);
     };
 
-    // Setup mock responses for the KV put() and get().
+    // Setup mock responses for the KV put(), get(), and list().
     let putKVCalled = false;
     countryCodeKV.put = (
       _key: string,
@@ -102,6 +103,28 @@ describe('helloworker', () => {
       return Promise.resolve('+1');
     };
 
+    let listKVCalled = false;
+    countryCodeKV.list = (
+      params:
+        | {
+            prefix?: string;
+            limit?: number;
+            cursor?: string;
+          }
+        | undefined,
+    ): Promise<CloudflareWorkerKVList> => {
+      listKVCalled = true;
+      let prefix = 'empty';
+      if (params) {
+        prefix = params.prefix || 'missing';
+      }
+      return Promise.resolve({
+        keys: [{ name: prefix, expiration: 1234 }],
+        list_complete: false,
+        cursor: 'CursorID',
+      });
+    };
+
     const request = makeCloudflareWorkerRequest('/path', {
       cf: {
         colo: 'SFO',
@@ -115,9 +138,10 @@ describe('helloworker', () => {
 
     expect(fetchMock).toBeCalledTimes(1);
     expect(response.status).toBe(200);
-    expect(await response.text()).toBe('Hello US +1!');
+    expect(await response.text()).toBe('Hello US +1 countries!');
     expect(putCacheCalled).toBe(true);
     expect(putKVCalled).toBe(true);
     expect(getKVCalled).toBe(true);
+    expect(listKVCalled).toBe(true);
   });
 });