diff --git a/packages/middleware-retry/src/defaultStrategy.spec.ts b/packages/middleware-retry/src/defaultStrategy.spec.ts
index 7c2207a6237a8..fe3759e611946 100644
--- a/packages/middleware-retry/src/defaultStrategy.spec.ts
+++ b/packages/middleware-retry/src/defaultStrategy.spec.ts
@@ -11,40 +11,22 @@ import { getDefaultRetryQuota } from "./defaultRetryQuota";
 import { HttpRequest } from "@aws-sdk/protocol-http";
 import { v4 } from "uuid";
 
-jest.mock("@aws-sdk/service-error-classification", () => ({
-  isThrottlingError: jest.fn().mockReturnValue(true)
-}));
+jest.mock("@aws-sdk/service-error-classification");
+jest.mock("./delayDecider");
+jest.mock("./retryDecider");
+jest.mock("./defaultRetryQuota");
+jest.mock("@aws-sdk/protocol-http");
+jest.mock("uuid");
 
-jest.mock("./delayDecider", () => ({
-  defaultDelayDecider: jest.fn().mockReturnValue(0)
-}));
-
-jest.mock("./retryDecider", () => ({
-  defaultRetryDecider: jest.fn().mockReturnValue(true)
-}));
+describe("defaultStrategy", () => {
+  let next: jest.Mock; // variable for next mock function in utility methods
+  const maxAttempts = 3;
 
-jest.mock("./defaultRetryQuota", () => {
   const mockDefaultRetryQuota = {
     hasRetryTokens: jest.fn().mockReturnValue(true),
     retrieveRetryTokens: jest.fn().mockReturnValue(1),
     releaseRetryTokens: jest.fn()
   };
-  return { getDefaultRetryQuota: () => mockDefaultRetryQuota };
-});
-
-jest.mock("@aws-sdk/protocol-http", () => ({
-  HttpRequest: {
-    isInstance: jest.fn().mockReturnValue(false)
-  }
-}));
-
-jest.mock("uuid", () => ({
-  v4: jest.fn(() => "42")
-}));
-
-describe("defaultStrategy", () => {
-  let next: jest.Mock; // variable for next mock function in utility methods
-  const maxAttempts = 3;
 
   const mockSuccessfulOperation = (
     maxAttempts: number,
@@ -122,6 +104,17 @@ describe("defaultStrategy", () => {
     return retryStrategy.retry(next, { request: { headers: {} } } as any);
   };
 
+  beforeEach(() => {
+    (isThrottlingError as jest.Mock).mockReturnValue(true);
+    (defaultDelayDecider as jest.Mock).mockReturnValue(0);
+    (defaultRetryDecider as jest.Mock).mockReturnValue(true);
+    (getDefaultRetryQuota as jest.Mock).mockReturnValue(mockDefaultRetryQuota);
+    ((HttpRequest as unknown) as jest.Mock).mockReturnValue({
+      isInstance: jest.fn().mockReturnValue(false)
+    });
+    (v4 as jest.Mock).mockReturnValue("42");
+  });
+
   afterEach(() => {
     jest.clearAllMocks();
   });
diff --git a/packages/middleware-retry/src/retryDecider.spec.ts b/packages/middleware-retry/src/retryDecider.spec.ts
index 271f22baba0bc..b51843644b60a 100644
--- a/packages/middleware-retry/src/retryDecider.spec.ts
+++ b/packages/middleware-retry/src/retryDecider.spec.ts
@@ -7,18 +7,20 @@ import {
 import { defaultRetryDecider } from "./retryDecider";
 import { SdkError } from "@aws-sdk/smithy-client";
 
-jest.mock("@aws-sdk/service-error-classification", () => ({
-  isRetryableByTrait: jest.fn().mockReturnValue(false),
-  isClockSkewError: jest.fn().mockReturnValue(false),
-  isThrottlingError: jest.fn().mockReturnValue(false),
-  isTransientError: jest.fn().mockReturnValue(false)
-}));
+jest.mock("@aws-sdk/service-error-classification");
 
 describe("defaultRetryDecider", () => {
   const createMockError = () =>
     Object.assign(new Error(), { $metadata: {} }) as SdkError;
 
   beforeEach(() => {
+    (isRetryableByTrait as jest.Mock).mockReturnValue(false);
+    (isClockSkewError as jest.Mock).mockReturnValue(false);
+    (isThrottlingError as jest.Mock).mockReturnValue(false);
+    (isTransientError as jest.Mock).mockReturnValue(false);
+  });
+
+  afterEach(() => {
     jest.clearAllMocks();
   });