diff --git a/spec/fixtures/module/declare-buffer.js b/spec/fixtures/module/declare-buffer.js
new file mode 100644
index 0000000000..9a054a24b5
--- /dev/null
+++ b/spec/fixtures/module/declare-buffer.js
@@ -0,0 +1,2 @@
+const Buffer = 'declared Buffer'
+module.exports = Buffer
diff --git a/spec/modules-spec.js b/spec/modules-spec.js
index b8c02a2e3e..5f82717527 100644
--- a/spec/modules-spec.js
+++ b/spec/modules-spec.js
@@ -69,6 +69,12 @@ describe('third-party module', function () {
         assert.strictEqual(require('./fixtures/module/declare-global'), 'declared global')
       })
     })
+
+    describe('Buffer', function () {
+      it('can be declared in a module', function () {
+        assert.strictEqual(require('./fixtures/module/declare-buffer'), 'declared Buffer')
+      })
+    })
   })
 })