diff --git a/test/fixtures/.redocly.yml b/test/fixtures/.redocly.yml
index 5ff6072..e6c192a 100644
--- a/test/fixtures/.redocly.yml
+++ b/test/fixtures/.redocly.yml
@@ -10,3 +10,7 @@ apis:
     root: ./path-fragments.api.yml
     openapi-ts:
       output: ./path-fragments.api.ts
+  request-body:
+    root: ./request-body.api.yml
+    openapi-ts:
+      output: ./request-body.api.ts
diff --git a/test/fixtures/request-body.api.yml b/test/fixtures/request-body.api.yml
new file mode 100644
index 0000000..52e655e
--- /dev/null
+++ b/test/fixtures/request-body.api.yml
@@ -0,0 +1,71 @@
+openapi: 3.0.2
+info:
+  title: Request Body API
+  version: 1.0.0
+servers:
+  - url: http://localhost:3000
+paths:
+  /resource:
+    get:
+      summary: Get Resource
+      operationId: getResource
+      responses:
+        200:
+          description: Success
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Resource"
+    post:
+      summary: Create Resource
+      operationId: createResource
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/NewResource"
+      responses:
+        201:
+          description: Created
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Resource"
+    patch:
+      summary: Patch Resource
+      operationId: patchResource
+      requestBody:
+        required: false
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/NewResource"
+      responses:
+        200:
+          description: Success
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Resource"
+components:
+  schemas:
+    Resource:
+      allOf:
+        - $ref: "#/components/schemas/NewResource"
+        - type: object
+          required:
+            - id
+          properties:
+            id:
+              type: string
+    NewResource:
+      type: object
+      required:
+        - name
+        - value
+      properties:
+        name:
+          type: string
+        value:
+          type: integer
diff --git a/test/no-content.test.ts b/test/no-content.test.ts
index da2c7b1..485992e 100644
--- a/test/no-content.test.ts
+++ b/test/no-content.test.ts
@@ -3,7 +3,7 @@ import { describe, expect, expectTypeOf, test } from "vitest";
 import { createOpenApiHttp } from "../exports/main.js";
 import type { paths } from "./fixtures/no-content.api.js";
 
-describe("Given an OpenAPI schema with a no-content endpoint", () => {
+describe("Given an OpenAPI schema endpoint with no-content", () => {
   const http = createOpenApiHttp<paths>({ baseUrl: "*" });
 
   test("When the DELETE method is mocked, Then empty responses can be returned", async () => {
diff --git a/test/path-fragments.test.ts b/test/path-fragments.test.ts
index 94b2e6d..01d4f3e 100644
--- a/test/path-fragments.test.ts
+++ b/test/path-fragments.test.ts
@@ -3,7 +3,7 @@ import { createOpenApiHttp } from "../exports/main.js";
 import type { paths } from "./fixtures/path-fragments.api.js";
 import { HttpResponse } from "msw";
 
-describe("Given an OpenAPI schema with an endpoint that contains path fragments", () => {
+describe("Given an OpenAPI schema endpoint that contains path fragments", () => {
   const http = createOpenApiHttp<paths>({ baseUrl: "*" });
 
   test("When a endpoint is mocked, Then OpenAPI path fragments can be parsed by the handler", async () => {
diff --git a/test/request-body.test.ts b/test/request-body.test.ts
new file mode 100644
index 0000000..738fb75
--- /dev/null
+++ b/test/request-body.test.ts
@@ -0,0 +1,58 @@
+import { describe, expect, expectTypeOf, test } from "vitest";
+import { createOpenApiHttp } from "../src/openapi-http.js";
+import type { paths } from "./fixtures/request-body.api.js";
+import { HttpResponse, type StrictRequest } from "msw";
+
+describe("Given an OpenAPI schema endpoint with request content", () => {
+  const http = createOpenApiHttp<paths>({ baseUrl: "*" });
+
+  test("When a request contains content, Then the content can be used in the response", async () => {
+    const request = new Request(new URL("/resource", "http://localhost:3000"), {
+      method: "post",
+      body: JSON.stringify({ name: "test-name", value: 16 }),
+    });
+
+    const handler = http.post("/resource", async ({ request }) => {
+      const newResource = await request.json();
+      return HttpResponse.json(
+        { ...newResource, id: "test-id" },
+        { status: 201 },
+      );
+    });
+    const result = await handler.run({ request });
+
+    const responseBody = await result?.response?.json();
+    expect(result?.response?.status).toBe(201);
+    expect(responseBody).toStrictEqual({
+      id: "test-id",
+      name: "test-name",
+      value: 16,
+    });
+  });
+
+  test("When a request is expected to contain content, Then the content is strict-typed", () => {
+    type Endpoint = typeof http.post<"/resource">;
+    const resolver = expectTypeOf<Endpoint>().parameter(1);
+    const request = resolver.parameter(0).toHaveProperty("request");
+
+    request.toEqualTypeOf<StrictRequest<{ name: string; value: number }>>();
+  });
+
+  test("When a request content is optional, Then the content is strict-typed with optional", () => {
+    type Endpoint = typeof http.patch<"/resource">;
+    const resolver = expectTypeOf<Endpoint>().parameter(1);
+    const request = resolver.parameter(0).toHaveProperty("request");
+
+    request.toEqualTypeOf<
+      StrictRequest<{ name: string; value: number } | undefined>
+    >();
+  });
+
+  test("When a request is not expected to contain content, Then the content is undefined", () => {
+    type Endpoint = typeof http.get<"/resource">;
+    const resolver = expectTypeOf<Endpoint>().parameter(1);
+    const request = resolver.parameter(0).toHaveProperty("request");
+
+    request.toEqualTypeOf<StrictRequest<undefined>>();
+  });
+});