diff --git a/examples/erc20/MyToken.sol b/examples/erc20/MyToken.sol
index 06083b9..0c82391 100644
--- a/examples/erc20/MyToken.sol
+++ b/examples/erc20/MyToken.sol
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-only
+// SPDX-License-Identifier: MIT
 pragma solidity >=0.8;
 
 import {ERC20} from "./ERC20.sol";
diff --git a/types.ts b/types.ts
index ea334da..89fe440 100644
--- a/types.ts
+++ b/types.ts
@@ -1,4 +1,4 @@
-import { LibraryAddresses } from './deps.ts'
+import type { LibraryAddresses, Wrapper as SolcWrapper } from './deps.ts'
 
 export type Input = {
   language: 'Solidity' | 'Yul'
@@ -147,3 +147,5 @@ export type Output = {
   sourceList?: string[]
   sources?: Record<string, { id: number; AST?: any }>
 }
+
+export type Wrapper = Omit<SolcWrapper, 'loadRemoteVersion' | 'setupMethods'>
diff --git a/wrapper_test.ts b/wrapper_test.ts
index 8bee2c8..6af2298 100644
--- a/wrapper_test.ts
+++ b/wrapper_test.ts
@@ -2,21 +2,57 @@ import { it, describe, run, expect, beforeAll, afterAll } from 'https://deno.lan
 import { wrapper } from './wrapper.ts'
 import { createRequire } from './deps.ts'
 import { download } from 'solc/download'
+import type { Input, Output, Wrapper } from 'solc/types'
 
 const require = createRequire(import.meta.url)
 
+const contract = `
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.8;
+
+contract HelloWorld {
+    string public greet = "Hello World!";
+}
+`
+
 describe('solc/wrapper.ts', () => {
+  let solc: Wrapper
   beforeAll(async () => {
     await download('./soljson_test.js', '0.8.18')
+    solc = wrapper(require('./soljson_test.js'))
   })
   it('returns JS interface', async () => {
-    const solc = wrapper(require('./soljson_test.js'))
-
     expect(solc.compile).toBeDefined()
     expect(solc.version()).toBe('0.8.18+commit.87f61d96.Emscripten.clang')
     expect(solc.semver()).toBe('0.8.18+commit.87f61d96.Emscripten.clang')
     expect(solc.license()).toContain('Most of the code is licensed under GPLv3 (see below), the license for individual')
   })
+  it('compiles a Solidity file', async () => {
+    const input: Input = {
+      language: 'Solidity',
+      sources: {
+        'Hello.sol': { content: contract }
+      },
+      settings: {
+        outputSelection: {
+          '*': {
+            '*': ['*']
+          }
+        }
+      }
+    }
+    const output: Output = JSON.parse(solc.compile(JSON.stringify(input)))
+    expect(output.sources!['Hello.sol'].id).toEqual(0)
+    expect(output.contracts!['Hello.sol']['HelloWorld'].abi).toEqual([
+      {
+        inputs: [],
+        name: 'greet',
+        outputs: [{ internalType: 'string', name: '', type: 'string' }],
+        stateMutability: 'view',
+        type: 'function'
+      }
+    ])
+  })
 })
 
 run()