diff --git a/test/parallel/test-stream-writable-clear-buffer.js b/test/parallel/test-stream-writable-clear-buffer.js
index 0a41f1a9979290..c4d7ae151a38fb 100644
--- a/test/parallel/test-stream-writable-clear-buffer.js
+++ b/test/parallel/test-stream-writable-clear-buffer.js
@@ -3,7 +3,7 @@
 // This test ensures that the _writeableState.bufferedRequestCount and
 // the actual buffered request count are the same.
 
-require('../common');
+const common = require('../common');
 const Stream = require('stream');
 const assert = require('assert');
 
@@ -24,12 +24,12 @@ const testStream = new StreamWritable();
 testStream.cork();
 
 for (let i = 1; i <= 5; i++) {
-  testStream.write(i, () => {
+  testStream.write(i, common.mustCall(() => {
     assert.strictEqual(
       testStream._writableState.bufferedRequestCount,
       testStream._writableState.getBuffer().length
     );
-  });
+  }));
 }
 
 testStream.end();