diff --git a/test/one.of.2.spec.ts b/test/one.of.2.spec.ts
new file mode 100644
index 00000000..9b34495f
--- /dev/null
+++ b/test/one.of.2.spec.ts
@@ -0,0 +1,84 @@
+import * as path from 'path';
+import * as express from 'express';
+import { expect } from 'chai';
+import * as request from 'supertest';
+import { createApp } from './common/app';
+
+const packageJson = require('../package.json');
+
+describe.only(packageJson.name, () => {
+  let app = null;
+
+  before(async () => {
+    const apiSpec = path.join('test', 'resources', 'one.of.2.yaml');
+    app = await createApp(
+      { apiSpec },
+      3005,
+      app => {
+        app.post(`${app.basePath}/typethrees`, (req, res) => {
+          res.status(201).json(req.body);
+        });
+        app.use((err, req, res, next) => {
+          res.status(err.status || 500).json({
+            message: err.message,
+            code: err.status || 500,
+          });
+        });
+      },
+      false,
+    );
+  });
+
+  after(() => {
+    app.server.close();
+  });
+  it('should POST TypeOne', async () => {
+    return request(app)
+      .post(`${app.basePath}/typethrees`)
+      .send({
+        whatever: 'Whatever One',
+        somethings: [
+          {
+            type: 'TypeOne',
+            uniqueOne: 'Unique One',
+          },
+        ],
+      })
+      .expect(201)
+      .expect('Content-Type', /json/)
+      .then(data => {
+        expect(data).to.not.be.an('undefined');
+        expect(data.body).to.not.be.an('undefined');
+        expect(data.body.whatever).to.not.be.an('undefined');
+        expect(data.body.whatever).to.equal('Whatever One');
+        expect(data.body.somethings).to.not.be.an('undefined');
+        expect(data.body.somethings[0].type).to.equal('TypeOne');
+        expect(data.body.somethings[0].uniqueOne).to.equal('Unique One');
+      });
+  });
+
+  it('should POST TypeTwo', async () => {
+    return request(app)
+      .post(`${app.basePath}/typethrees`)
+      .send({
+        whatever: 'Whatever Two',
+        somethings: [
+          {
+            type: 'TypeTwo',
+            uniqueTwo: 'Unique Two',
+          },
+        ],
+      })
+      .expect(201)
+      .expect('Content-Type', /json/)
+      .then(data => {
+        expect(data).to.not.be.an('undefined');
+        expect(data.body).to.not.be.an('undefined');
+        expect(data.body.whatever).to.not.be.an('undefined');
+        expect(data.body.whatever).to.equal('Whatever Two');
+        expect(data.body.somethings).to.not.be.an('undefined');
+        expect(data.body.somethings[0].type).to.equal('TypeTwo');
+        expect(data.body.somethings[0].uniqueTwo).to.equal('Unique Two');
+      });
+  });
+});
diff --git a/test/resources/one.of.2.yaml b/test/resources/one.of.2.yaml
new file mode 100644
index 00000000..faf25c47
--- /dev/null
+++ b/test/resources/one.of.2.yaml
@@ -0,0 +1,140 @@
+
+openapi: '3.0.0'
+
+info:
+  description: express-openapi-validator-test
+  version: 1.0.0
+  title: express-openapi-validator-test
+  license:
+    name: MIT License
+    url: https://opensource.org/licenses/MIT
+
+servers:
+  - url: http://localhost:3010/v0
+
+paths:
+  /typethrees:
+    post:
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              oneOf:
+                - $ref: '#/components/schemas/TypeThree'
+      responses:
+        '201':
+          description: Application response
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/TypeThree'
+        default:
+          description: unexpected error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+
+components:
+  schemas:
+    Error:
+      required:
+        - code
+        - message
+      properties:
+        code:
+          type: integer
+          format: int32
+        message:
+          type: string
+
+    SuperTypeOne:
+      type: object
+      properties:
+        type:
+          type: string
+        value:
+          type: number
+          format: int32
+      discriminator:
+        propertyName: type
+      required:
+        - value
+        - type
+
+    TypeOne:
+      allOf:   
+        - $ref: '#/components/schemas/SuperTypeOne'
+      type: object
+      properties:
+        type:
+          type: string
+          enum: [TypeOne]
+        value:
+          type: number
+          format: int32
+          enum: [ 1 ]
+          default: 1
+        uniqueOne:
+          type: string
+          default: Unique One
+      required:
+        - type
+        - uniqueOne
+
+    TypeTwo:
+      allOf:   
+        - $ref: '#/components/schemas/SuperTypeOne'
+      type: object
+      properties:
+        type:
+          type: string
+          enum: [TypeTwo]
+        value:
+          type: number
+          format: int32
+          enum: [ 2 ]
+          default: 2
+        uniqueTwo:
+          type: string
+          default: Unique Two
+      required:
+        - uniqueTwo
+
+    SuperTypeTwo:
+      type: object
+      properties:
+        id:
+          type: string
+          format: uuid
+        date:
+          type: string
+          format: date-time
+        someStrings:
+          type: array
+          items:
+            type: string
+
+    TypeThree:
+      allOf:   
+        - $ref: '#/components/schemas/SuperTypeTwo'
+      type: object
+      properties:
+        type:
+          type: string
+          enum: [TypeThree]
+          default: TypeThree
+        somethings:
+          type: array
+          minItems: 1
+          maxItems: 2
+          items:
+            oneOf:
+              - $ref: "#/components/schemas/TypeOne"
+              - $ref: "#/components/schemas/TypeTwo"
+            discriminator:
+              propertyName: type
+      required:
+        - type
+        - somethings