diff --git a/lib/buffer.js b/lib/buffer.js
index cb93d7e2488f3b..b7840335c61efa 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -1056,8 +1056,6 @@ Buffer.prototype.readDoubleBE = function readDoubleBE(offset, noAssert) {
 
 
 function checkInt(buffer, value, offset, ext, max, min) {
-  if (!isUint8Array(buffer))
-    throw new TypeError('"buffer" argument must be a Buffer or Uint8Array');
   if (value > max || value < min)
     throw new TypeError('"value" argument is out of bounds');
   if (offset + ext > buffer.length)
diff --git a/test/parallel/test-buffer-write-noassert.js b/test/parallel/test-buffer-write-noassert.js
index ea5ca923f01983..7423e462ca1af2 100644
--- a/test/parallel/test-buffer-write-noassert.js
+++ b/test/parallel/test-buffer-write-noassert.js
@@ -20,14 +20,10 @@ function write(funx, args, result, res) {
     );
   }
 
-  {
-    const error = /Int/.test(funx) ?
-      /^TypeError: "buffer" argument must be a Buffer or Uint8Array$/ :
-      /^TypeError: argument should be a Buffer$/;
-
+  if (!/Int/.test(funx)) {
     assert.throws(
       () => Buffer.alloc(9)[funx].apply(new Uint32Array(1), args),
-      error
+      /^TypeError: argument should be a Buffer$/
     );
   }