diff --git a/test/__snapshots__/index.spec.ts.snap b/test/__snapshots__/index.spec.ts.snap
index c0f972f4..86d5cd36 100644
--- a/test/__snapshots__/index.spec.ts.snap
+++ b/test/__snapshots__/index.spec.ts.snap
@@ -242,19 +242,19 @@ import { CancelablePromise } from './CancelablePromise';
 import type { OnCancel } from './CancelablePromise';
 import type { OpenAPIConfig } from './OpenAPI';
 
-const isDefined = <T>(value: T | null | undefined): value is Exclude<T, null | undefined> => {
+export const isDefined = <T>(value: T | null | undefined): value is Exclude<T, null | undefined> => {
     return value !== undefined && value !== null;
 };
 
-const isString = (value: any): value is string => {
+export const isString = (value: any): value is string => {
     return typeof value === 'string';
 };
 
-const isStringWithValue = (value: any): value is string => {
+export const isStringWithValue = (value: any): value is string => {
     return isString(value) && value !== '';
 };
 
-const isBlob = (value: any): value is Blob => {
+export const isBlob = (value: any): value is Blob => {
     return (
         typeof value === 'object' &&
         typeof value.type === 'string' &&
@@ -267,11 +267,11 @@ const isBlob = (value: any): value is Blob => {
     );
 };
 
-const isFormData = (value: any): value is FormData => {
+export const isFormData = (value: any): value is FormData => {
     return value instanceof FormData;
 };
 
-const base64 = (str: string): string => {
+export const base64 = (str: string): string => {
     try {
         return btoa(str);
     } catch (err) {
@@ -280,7 +280,7 @@ const base64 = (str: string): string => {
     }
 };
 
-const getQueryString = (params: Record<string, any>): string => {
+export const getQueryString = (params: Record<string, any>): string => {
     const qs: string[] = [];
 
     const append = (key: string, value: any) => {
@@ -333,7 +333,7 @@ const getUrl = (config: OpenAPIConfig, options: ApiRequestOptions): string => {
     return url;
 };
 
-const getFormData = (options: ApiRequestOptions): FormData | undefined => {
+export const getFormData = (options: ApiRequestOptions): FormData | undefined => {
     if (options.formData) {
         const formData = new FormData();
 
@@ -362,14 +362,14 @@ const getFormData = (options: ApiRequestOptions): FormData | undefined => {
 
 type Resolver<T> = (options: ApiRequestOptions) => Promise<T>;
 
-const resolve = async <T>(options: ApiRequestOptions, resolver?: T | Resolver<T>): Promise<T | undefined> => {
+export const resolve = async <T>(options: ApiRequestOptions, resolver?: T | Resolver<T>): Promise<T | undefined> => {
     if (typeof resolver === 'function') {
         return (resolver as Resolver<T>)(options);
     }
     return resolver;
 };
 
-const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Promise<Headers> => {
+export const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Promise<Headers> => {
     const token = await resolve(options, config.TOKEN);
     const username = await resolve(options, config.USERNAME);
     const password = await resolve(options, config.PASSWORD);
@@ -410,7 +410,7 @@ const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Pr
     return new Headers(headers);
 };
 
-const getRequestBody = (options: ApiRequestOptions): any => {
+export const getRequestBody = (options: ApiRequestOptions): any => {
     if (options.body !== undefined) {
         if (options.mediaType?.includes('/json')) {
             return JSON.stringify(options.body)
@@ -450,7 +450,7 @@ export const sendRequest = async (
     return await fetch(url, request);
 };
 
-const getResponseHeader = (response: Response, responseHeader?: string): string | undefined => {
+export const getResponseHeader = (response: Response, responseHeader?: string): string | undefined => {
     if (responseHeader) {
         const content = response.headers.get(responseHeader);
         if (isString(content)) {
@@ -460,7 +460,7 @@ const getResponseHeader = (response: Response, responseHeader?: string): string
     return undefined;
 };
 
-const getResponseBody = async (response: Response): Promise<any> => {
+export const getResponseBody = async (response: Response): Promise<any> => {
     if (response.status !== 204) {
         try {
             const contentType = response.headers.get('Content-Type');
@@ -480,7 +480,7 @@ const getResponseBody = async (response: Response): Promise<any> => {
     return undefined;
 };
 
-const catchErrorCodes = (options: ApiRequestOptions, result: ApiResult): void => {
+export const catchErrorCodes = (options: ApiRequestOptions, result: ApiResult): void => {
     const errors: Record<number, string> = {
         400: 'Bad Request',
         401: 'Unauthorized',
@@ -3337,19 +3337,19 @@ import { CancelablePromise } from './CancelablePromise';
 import type { OnCancel } from './CancelablePromise';
 import type { OpenAPIConfig } from './OpenAPI';
 
-const isDefined = <T>(value: T | null | undefined): value is Exclude<T, null | undefined> => {
+export const isDefined = <T>(value: T | null | undefined): value is Exclude<T, null | undefined> => {
     return value !== undefined && value !== null;
 };
 
-const isString = (value: any): value is string => {
+export const isString = (value: any): value is string => {
     return typeof value === 'string';
 };
 
-const isStringWithValue = (value: any): value is string => {
+export const isStringWithValue = (value: any): value is string => {
     return isString(value) && value !== '';
 };
 
-const isBlob = (value: any): value is Blob => {
+export const isBlob = (value: any): value is Blob => {
     return (
         typeof value === 'object' &&
         typeof value.type === 'string' &&
@@ -3362,11 +3362,11 @@ const isBlob = (value: any): value is Blob => {
     );
 };
 
-const isFormData = (value: any): value is FormData => {
+export const isFormData = (value: any): value is FormData => {
     return value instanceof FormData;
 };
 
-const base64 = (str: string): string => {
+export const base64 = (str: string): string => {
     try {
         return btoa(str);
     } catch (err) {
@@ -3375,7 +3375,7 @@ const base64 = (str: string): string => {
     }
 };
 
-const getQueryString = (params: Record<string, any>): string => {
+export const getQueryString = (params: Record<string, any>): string => {
     const qs: string[] = [];
 
     const append = (key: string, value: any) => {
@@ -3428,7 +3428,7 @@ const getUrl = (config: OpenAPIConfig, options: ApiRequestOptions): string => {
     return url;
 };
 
-const getFormData = (options: ApiRequestOptions): FormData | undefined => {
+export const getFormData = (options: ApiRequestOptions): FormData | undefined => {
     if (options.formData) {
         const formData = new FormData();
 
@@ -3457,14 +3457,14 @@ const getFormData = (options: ApiRequestOptions): FormData | undefined => {
 
 type Resolver<T> = (options: ApiRequestOptions) => Promise<T>;
 
-const resolve = async <T>(options: ApiRequestOptions, resolver?: T | Resolver<T>): Promise<T | undefined> => {
+export const resolve = async <T>(options: ApiRequestOptions, resolver?: T | Resolver<T>): Promise<T | undefined> => {
     if (typeof resolver === 'function') {
         return (resolver as Resolver<T>)(options);
     }
     return resolver;
 };
 
-const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Promise<Headers> => {
+export const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Promise<Headers> => {
     const token = await resolve(options, config.TOKEN);
     const username = await resolve(options, config.USERNAME);
     const password = await resolve(options, config.PASSWORD);
@@ -3505,7 +3505,7 @@ const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Pr
     return new Headers(headers);
 };
 
-const getRequestBody = (options: ApiRequestOptions): any => {
+export const getRequestBody = (options: ApiRequestOptions): any => {
     if (options.body !== undefined) {
         if (options.mediaType?.includes('/json')) {
             return JSON.stringify(options.body)
@@ -3545,7 +3545,7 @@ export const sendRequest = async (
     return await fetch(url, request);
 };
 
-const getResponseHeader = (response: Response, responseHeader?: string): string | undefined => {
+export const getResponseHeader = (response: Response, responseHeader?: string): string | undefined => {
     if (responseHeader) {
         const content = response.headers.get(responseHeader);
         if (isString(content)) {
@@ -3555,7 +3555,7 @@ const getResponseHeader = (response: Response, responseHeader?: string): string
     return undefined;
 };
 
-const getResponseBody = async (response: Response): Promise<any> => {
+export const getResponseBody = async (response: Response): Promise<any> => {
     if (response.status !== 204) {
         try {
             const contentType = response.headers.get('Content-Type');
@@ -3575,7 +3575,7 @@ const getResponseBody = async (response: Response): Promise<any> => {
     return undefined;
 };
 
-const catchErrorCodes = (options: ApiRequestOptions, result: ApiResult): void => {
+export const catchErrorCodes = (options: ApiRequestOptions, result: ApiResult): void => {
     const errors: Record<number, string> = {
         400: 'Bad Request',
         401: 'Unauthorized',
@@ -3711,6 +3711,7 @@ export type { Pageable } from './models/Pageable';
 export type { SimpleBoolean } from './models/SimpleBoolean';
 export type { SimpleFile } from './models/SimpleFile';
 export type { SimpleInteger } from './models/SimpleInteger';
+export type { SimpleParameter } from './models/SimpleParameter';
 export type { SimpleReference } from './models/SimpleReference';
 export type { SimpleString } from './models/SimpleString';
 export type { SimpleStringWithPattern } from './models/SimpleStringWithPattern';
@@ -3780,6 +3781,7 @@ export { $Pageable } from './schemas/$Pageable';
 export { $SimpleBoolean } from './schemas/$SimpleBoolean';
 export { $SimpleFile } from './schemas/$SimpleFile';
 export { $SimpleInteger } from './schemas/$SimpleInteger';
+export { $SimpleParameter } from './schemas/$SimpleParameter';
 export { $SimpleReference } from './schemas/$SimpleReference';
 export { $SimpleString } from './schemas/$SimpleString';
 export { $SimpleStringWithPattern } from './schemas/$SimpleStringWithPattern';
@@ -4907,6 +4909,19 @@ export type SimpleInteger = number;
 "
 `;
 
+exports[`v3 should generate: test/generated/v3/models/SimpleParameter.ts 1`] = `
+"/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+/**
+ * This is a reusable parameter
+ */
+export type SimpleParameter = string;
+"
+`;
+
+exports[`v3 should generate: test/generated/v3/models/SimpleReference.ts 1`] = `
 "/* istanbul ignore file */
 /* tslint:disable */
 /* eslint-disable */
@@ -6234,6 +6249,17 @@ export const $SimpleInteger = {
 "
 `;
 
+exports[`v3 should generate: test/generated/v3/schemas/$SimpleParameter.ts 1`] = `
+"/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+export const $SimpleParameter = {
+    type: 'string',
+    description: \`This is a reusable parameter\`,
+} as const;
+"
+`;
+
 exports[`v3 should generate: test/generated/v3/schemas/$SimpleReference.ts 1`] = `
 "/* istanbul ignore file */
 /* tslint:disable */