diff --git a/test/index.test.ts b/test/index.test.ts
new file mode 100644
index 0000000..dc85b71
--- /dev/null
+++ b/test/index.test.ts
@@ -0,0 +1,86 @@
+import { test } from 'tap'
+import { fastify } from 'fastify'
+import { Pool } from 'pg'
+const plugin = require('../src')
+
+const connection = {
+  user: 'postgres',
+  host: 'localhost',
+  database: 'postgres',
+  password: 'password',
+  port: 5445
+}
+
+const options = { pool: connection, schemas: 'public' }
+
+test('should create the reply decorator', async t => {
+  t.plan(1)
+
+  const app = fastify()
+  app.register(plugin, options)
+  await app.ready()
+
+  t.ok(app.hasReplyDecorator('graphql'))
+})
+
+test('should execute graphql queries', async t => {
+  t.plan(1)
+
+  const user = {
+    id: 'b1f26dea-47bf-463b-befe-bb4c9adaae45',
+    username: 'user',
+    password: 'password'
+  }
+  const pool = new Pool(connection)
+  await pool.query(`
+  CREATE table IF NOT EXISTS users (
+    id UUID PRIMARY key,
+    username varchar(255) not null,
+    password varchar(255) not null
+  );`)
+  await pool.query(`
+  INSERT INTO users (id, username, password)
+    VALUES (\'${user.id}\', \'${user.username}\', \'${user.password}\');
+  `)
+
+  t.tearDown(async () => {
+    await pool.query(`DROP TABLE users`)
+  })
+
+  const app = fastify()
+  app.register(plugin, options)
+
+  app.post('/', async (req: any, reply: any) => {
+    return reply.graphql(req.body.query, req.body.variables)
+  })
+
+  await app.ready()
+
+  const res: any = await app.inject({
+    url: '/',
+    method: 'POST',
+    payload: {
+      query: `
+        {
+          allUsers {
+            nodes {
+              id,
+              username,
+              password
+            }
+          }
+        }`
+    }
+  })
+
+  t.deepEqual(
+    JSON.parse(res.body),
+    {
+      data: {
+        allUsers: {
+          nodes: [user]
+        }
+      }
+    }
+  );
+})