diff --git a/src/clients/uploads-api-client.ts b/src/clients/uploads-api-client.ts
index 531c12e1..371b178b 100644
--- a/src/clients/uploads-api-client.ts
+++ b/src/clients/uploads-api-client.ts
@@ -1,16 +1,15 @@
 import { UploadsApi } from '../api-models/uploads-api-model'
 import { ApiClientHelpers } from '../helpers'
-import { isJsonMime } from '../helpers/is-json-mime'
 import { APIConfigurationParameters } from '../types/api-configuration-parameters'
 
 export class UploadsApiClient extends UploadsApi {
   constructor(parameters?: APIConfigurationParameters) {
     const axios = ApiClientHelpers.assertAxiosInstance(parameters)
-    const basePath = ApiClientHelpers.assertBasePath()
+    const basePath = ApiClientHelpers.getDefaultBasePath()
 
     super(
       {
-        isJsonMime,
+        isJsonMime: ApiClientHelpers.isJsonMime,
         ...parameters,
       },
       basePath,
diff --git a/src/helpers/api-client-helpers.ts b/src/helpers/api-client-helpers.ts
index 97d6a85f..1351b9c0 100644
--- a/src/helpers/api-client-helpers.ts
+++ b/src/helpers/api-client-helpers.ts
@@ -23,8 +23,16 @@ export class ApiClientHelpers {
     return axiosInstance
   }
 
-  static assertBasePath(): string {
+  static getDefaultBasePath(): string {
     const { sellingPartner } = amazonMarketplaces.US
     return sellingPartner ? sellingPartner.region.endpoint : ''
   }
+
+  static isJsonMime(mime: string): boolean {
+    /* eslint-disable-next-line no-control-regex */
+    const jsonMime = new RegExp('^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$', 'i')
+    return (
+      mime !== null && (jsonMime.test(mime) || mime.toLowerCase() === 'application/json-patch+json')
+    )
+  }
 }
diff --git a/src/helpers/index.ts b/src/helpers/index.ts
index 9655bba4..c8e1a22d 100644
--- a/src/helpers/index.ts
+++ b/src/helpers/index.ts
@@ -1,4 +1,3 @@
 export * from './api-client-helpers'
 export * from './api-error-factory'
 export * from './decoder'
-export * from './is-json-mime'
diff --git a/src/helpers/is-json-mime.ts b/src/helpers/is-json-mime.ts
deleted file mode 100644
index 0f262eb9..00000000
--- a/src/helpers/is-json-mime.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-export function isJsonMime(mime: string): boolean {
-  /* eslint-disable-next-line no-control-regex */
-  const jsonMime = new RegExp('^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$', 'i')
-  return (
-    mime !== null && (jsonMime.test(mime) || mime.toLowerCase() === 'application/json-patch+json')
-  )
-}