diff --git a/.changeset/angry-toys-shave.md b/.changeset/angry-toys-shave.md
new file mode 100644
index 000000000000..1681c17d5713
--- /dev/null
+++ b/.changeset/angry-toys-shave.md
@@ -0,0 +1,5 @@
+---
+"wrangler": patch
+---
+
+Refactor tests to pass strict-null checks
diff --git a/packages/wrangler/src/__tests__/kv.test.ts b/packages/wrangler/src/__tests__/kv.test.ts
index ea55f744a69b..56a8d5493e69 100644
--- a/packages/wrangler/src/__tests__/kv.test.ts
+++ b/packages/wrangler/src/__tests__/kv.test.ts
@@ -8,6 +8,11 @@ import {
 import { runWrangler } from "./run-wrangler";
 import { runInTempDir } from "./run-in-tmp";
 
+interface KVNamespaceInfo {
+  title: string;
+  id: string;
+}
+
 describe("wrangler", () => {
   runInTempDir();
 
@@ -196,30 +201,30 @@ describe("wrangler", () => {
       }
 
       it("should list namespaces", async () => {
-        const KVNamespaces = [
+        const kvNamespaces: KVNamespaceInfo[] = [
           { title: "title-1", id: "id-1" },
           { title: "title-2", id: "id-2" },
         ];
-        mockListRequest(KVNamespaces);
+        mockListRequest(kvNamespaces);
         const { error, stdout, stderr } = await runWrangler(
           "kv:namespace list"
         );
         expect(error).toMatchInlineSnapshot(`undefined`);
         expect(stderr).toMatchInlineSnapshot(`""`);
         const namespaces = JSON.parse(stdout);
-        expect(namespaces).toEqual(KVNamespaces);
+        expect(namespaces).toEqual(kvNamespaces);
       });
 
       it("should make multiple requests for paginated results", async () => {
         // Create a lot of mock namespaces, so that the fetch requests will be paginated
-        const KVNamespaces = [];
+        const kvNamespaces: KVNamespaceInfo[] = [];
         for (let i = 0; i < 550; i++) {
-          KVNamespaces.push({ title: "title-" + i, id: "id-" + i });
+          kvNamespaces.push({ title: "title-" + i, id: "id-" + i });
         }
-        const requests = mockListRequest(KVNamespaces);
+        const requests = mockListRequest(kvNamespaces);
         const { stdout } = await runWrangler("kv:namespace list");
         const namespaces = JSON.parse(stdout);
-        expect(namespaces).toEqual(KVNamespaces);
+        expect(namespaces).toEqual(kvNamespaces);
         expect(requests.count).toEqual(6);
       });
     });
@@ -689,7 +694,7 @@ describe("wrangler", () => {
             if (expectedKeys.length <= keysPerRequest) {
               return createFetchResult(expectedKeys);
             } else {
-              const start = parseInt(query.get("cursor")) || 0;
+              const start = parseInt(query.get("cursor") ?? "0") || 0;
               const end = start + keysPerRequest;
               const cursor = end < expectedKeys.length ? end : undefined;
               return createFetchResult(
@@ -786,7 +791,7 @@ describe("wrangler", () => {
 
       it("should make multiple requests for paginated results", async () => {
         // Create a lot of mock keys, so that the fetch requests will be paginated
-        const keys = [];
+        const keys: string[] = [];
         for (let i = 0; i < 550; i++) {
           keys.push("key-" + i);
         }
diff --git a/packages/wrangler/src/__tests__/mock-cfetch.ts b/packages/wrangler/src/__tests__/mock-cfetch.ts
index f0ca6c035743..977308070313 100644
--- a/packages/wrangler/src/__tests__/mock-cfetch.ts
+++ b/packages/wrangler/src/__tests__/mock-cfetch.ts
@@ -1,5 +1,5 @@
 import type { RequestInit } from "node-fetch";
-import type { URLSearchParams } from "node:url";
+import { URLSearchParams } from "node:url";
 import { pathToRegexp } from "path-to-regexp";
 import { CF_API_BASE_URL } from "../cfetch";
 import type { FetchResult } from "../cfetch";
@@ -9,8 +9,8 @@ import type { FetchResult } from "../cfetch";
  */
 export type MockHandler<ResponseType> = (
   uri: RegExpExecArray,
-  init?: RequestInit,
-  queryParams?: URLSearchParams
+  init: RequestInit,
+  queryParams: URLSearchParams
 ) => ResponseType;
 
 type RemoveMockFn = () => void;
@@ -32,7 +32,7 @@ const mocks: MockFetch<unknown>[] = [];
 export async function mockFetchInternal(
   resource: string,
   init: RequestInit = {},
-  queryParams?: URLSearchParams
+  queryParams: URLSearchParams = new URLSearchParams()
 ) {
   for (const { regexp, method, handler } of mocks) {
     const resourcePath = new URL(resource, CF_API_BASE_URL).pathname;