diff --git a/test/built-ins/Uint8Array/fromBase64Into/ignores-receiver.js b/test/built-ins/Uint8Array/fromBase64Into/ignores-receiver.js
deleted file mode 100644
index 55d3bb96cb..0000000000
--- a/test/built-ins/Uint8Array/fromBase64Into/ignores-receiver.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (C) 2024 Kevin Gibbons. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-/*---
-esid: sec-uint8array.frombase64into
-description: Uint8Array.fromBase64Into ignores its receiver
-includes: [compareArray.js]
-features: [uint8array-base64]
----*/
-
-var fromBase64Into = Uint8Array.fromBase64Into;
-var target = new Uint8Array([255, 255, 255]);
-
-var result = fromBase64Into("Zg==", target);
-assert.sameValue(result.read, 4);
-assert.sameValue(result.written, 1);
-assert.compareArray(target, [102, 255, 255]);
diff --git a/test/built-ins/Uint8Array/fromHexInto/ignores-receiver.js b/test/built-ins/Uint8Array/fromHexInto/ignores-receiver.js
deleted file mode 100644
index 6c45490d19..0000000000
--- a/test/built-ins/Uint8Array/fromHexInto/ignores-receiver.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (C) 2024 Kevin Gibbons. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-/*---
-esid: sec-uint8array.fromhexinto
-description: Uint8Array.fromHexInto ignores its receiver
-includes: [compareArray.js]
-features: [uint8array-base64]
----*/
-
-var fromHexInto = Uint8Array.fromHexInto;
-var target = new Uint8Array([255, 255, 255]);
-
-var result = fromHexInto("aa", target);
-assert.sameValue(result.read, 2);
-assert.sameValue(result.written, 1);
-assert.compareArray(target, [170, 255, 255]);
diff --git a/test/built-ins/Uint8Array/fromBase64Into/alphabet.js b/test/built-ins/Uint8Array/prototype/setFromBase64/alphabet.js
similarity index 73%
rename from test/built-ins/Uint8Array/fromBase64Into/alphabet.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/alphabet.js
index 270396581c..d931f7ca05 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/alphabet.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/alphabet.js
@@ -1,41 +1,41 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
+esid: sec-uint8array.prototype.setfrombase64
 description: Conversion of base64 strings to Uint8Arrays exercising the alphabet option
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
 
 var target = new Uint8Array([255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('x+/y', target);
+var result = target.setFromBase64('x+/y');
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [199, 239, 242, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('x+/y', target, { alphabet: 'base64' });
+var result = target.setFromBase64('x+/y', { alphabet: 'base64' });
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [199, 239, 242, 255]);
 
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255]);
-  Uint8Array.fromBase64('x+/y', { alphabet: 'base64url' });
+  target.setFromBase64('x+/y', { alphabet: 'base64url' });
 });
 
 
 var target = new Uint8Array([255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('x-_y', target, { alphabet: 'base64url' });
+var result = target.setFromBase64('x-_y', { alphabet: 'base64url' });
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [199, 239, 242, 255]);
 
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255]);
-  Uint8Array.fromBase64('x-_y');
+  target.setFromBase64('x-_y');
 });
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255]);
-  Uint8Array.fromBase64('x-_y', { alphabet: 'base64' });
+  target.setFromBase64('x-_y', { alphabet: 'base64' });
 });
diff --git a/test/built-ins/Uint8Array/fromHexInto/descriptor.js b/test/built-ins/Uint8Array/prototype/setFromBase64/descriptor.js
similarity index 61%
rename from test/built-ins/Uint8Array/fromHexInto/descriptor.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/descriptor.js
index e26dea928b..f6765bb60c 100644
--- a/test/built-ins/Uint8Array/fromHexInto/descriptor.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/descriptor.js
@@ -1,14 +1,14 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
+esid: sec-uint8array.prototype.setfrombase64
 description: >
-  Uint8Array.fromHexInto has default data property attributes.
+  Uint8Array.prototype.setFromBase64 has default data property attributes.
 includes: [propertyHelper.js]
 features: [uint8array-base64]
 ---*/
 
-verifyProperty(Uint8Array, 'fromHexInto', {
+verifyProperty(Uint8Array.prototype, 'setFromBase64', {
   enumerable: false,
   writable: true,
   configurable: true
diff --git a/test/built-ins/Uint8Array/fromBase64Into/detached-buffer.js b/test/built-ins/Uint8Array/prototype/setFromBase64/detached-buffer.js
similarity index 73%
rename from test/built-ins/Uint8Array/fromBase64Into/detached-buffer.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/detached-buffer.js
index 80ebbcf4f4..11597b55a6 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/detached-buffer.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/detached-buffer.js
@@ -1,15 +1,15 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
-description: Uint8Array.fromBase64Into does not write to or error on detatched buffers
+esid: sec-uint8array.prototype.setfrombase64
+description: Uint8Array.prototype.setFromBase64 does not write to or error on detatched buffers
 includes: [detachArrayBuffer.js]
 features: [uint8array-base64]
 ---*/
 
 var target = new Uint8Array([255, 255, 255]);
 $DETACHBUFFER(target.buffer);
-var result = Uint8Array.fromBase64Into('Zg==', target);
+var result = target.setFromBase64('Zg==');
 assert.sameValue(result.read, 0);
 assert.sameValue(result.written, 0);
 
@@ -23,7 +23,7 @@ Object.defineProperty(targetDetachingOptions, 'alphabet', {
   }
 });
 var target = new Uint8Array([255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zg==', target, targetDetachingOptions);
+var result = target.setFromBase64('Zg==', targetDetachingOptions);
 assert.sameValue(getterCalls, 1);
 assert.sameValue(result.read, 0);
 assert.sameValue(result.written, 0);
diff --git a/test/built-ins/Uint8Array/fromBase64Into/illegal-characters.js b/test/built-ins/Uint8Array/prototype/setFromBase64/illegal-characters.js
similarity index 72%
rename from test/built-ins/Uint8Array/fromBase64Into/illegal-characters.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/illegal-characters.js
index 899d934c91..c3978f89ca 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/illegal-characters.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/illegal-characters.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
-description: Uint8Array.fromBase64 throws a SyntaxError when input has non-base64, non-ascii-whitespace characters
+esid: sec-uint8array.prototype.setfrombase64
+description: Uint8Array.prototype.setFromBase64 throws a SyntaxError when input has non-base64, non-ascii-whitespace characters
 features: [uint8array-base64]
 ---*/
 
@@ -19,6 +19,6 @@ var illegal = [
 illegal.forEach(function(value) {
   assert.throws(SyntaxError, function() {
     var target = new Uint8Array([255, 255, 255, 255, 255]);
-    Uint8Array.fromBase64Into(value, target);
+    target.setFromBase64(value);
   });
 });
diff --git a/test/built-ins/Uint8Array/fromBase64Into/last-chunk-handling.js b/test/built-ins/Uint8Array/prototype/setFromBase64/last-chunk-handling.js
similarity index 67%
rename from test/built-ins/Uint8Array/fromBase64Into/last-chunk-handling.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/last-chunk-handling.js
index 1c0ab248d6..3f0656af56 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/last-chunk-handling.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/last-chunk-handling.js
@@ -1,33 +1,33 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
-description: Handling of final chunks in Uint8Array.fromBase64Into
+esid: sec-uint8array.prototype.setfrombase64
+description: Handling of final chunks in target.setFromBase64
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
 
 // padding
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg==', target);
+var result = target.setFromBase64('ZXhhZg==');
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg==', target, { lastChunkHandling: 'loose' });
+var result = target.setFromBase64('ZXhhZg==', { lastChunkHandling: 'loose' });
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg==', target, { lastChunkHandling: 'stop-before-partial' });
+var result = target.setFromBase64('ZXhhZg==', { lastChunkHandling: 'stop-before-partial' });
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg==', target, { lastChunkHandling: 'strict' });
+var result = target.setFromBase64('ZXhhZg==', { lastChunkHandling: 'strict' });
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
@@ -35,97 +35,97 @@ assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 // no padding
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg', target);
+var result = target.setFromBase64('ZXhhZg');
 assert.sameValue(result.read, 6);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg', target, { lastChunkHandling: 'loose' });
+var result = target.setFromBase64('ZXhhZg', { lastChunkHandling: 'loose' });
 assert.sameValue(result.read, 6);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg', target, { lastChunkHandling: 'stop-before-partial' });
+var result = target.setFromBase64('ZXhhZg', { lastChunkHandling: 'stop-before-partial' });
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [101, 120, 97, 255, 255, 255]);
 
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-  Uint8Array.fromBase64Into('ZXhhZg', target, { lastChunkHandling: 'strict' });
+  target.setFromBase64('ZXhhZg', { lastChunkHandling: 'strict' });
 });
 
 
 // non-zero padding bits
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZh==', target);
+var result = target.setFromBase64('ZXhhZh==');
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZh==', target, { lastChunkHandling: 'loose' });
+var result = target.setFromBase64('ZXhhZh==', { lastChunkHandling: 'loose' });
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZh==', target, { lastChunkHandling: 'stop-before-partial' });
+var result = target.setFromBase64('ZXhhZh==', { lastChunkHandling: 'stop-before-partial' });
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-  Uint8Array.fromBase64Into('ZXhhZh==', target, { lastChunkHandling: 'strict' });
+  target.setFromBase64('ZXhhZh==', { lastChunkHandling: 'strict' });
 });
 
 
 // non-zero padding bits, no padding
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZh', target);
+var result = target.setFromBase64('ZXhhZh');
 assert.sameValue(result.read, 6);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZh', target, { lastChunkHandling: 'loose' });
+var result = target.setFromBase64('ZXhhZh', { lastChunkHandling: 'loose' });
 assert.sameValue(result.read, 6);
 assert.sameValue(result.written, 4);
 assert.compareArray(target, [101, 120, 97, 102, 255, 255]);
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZh', target, { lastChunkHandling: 'stop-before-partial' });
+var result = target.setFromBase64('ZXhhZh', { lastChunkHandling: 'stop-before-partial' });
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [101, 120, 97, 255, 255, 255]);
 
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-  Uint8Array.fromBase64Into('ZXhhZh', target, { lastChunkHandling: 'strict' });
+  target.setFromBase64('ZXhhZh', { lastChunkHandling: 'strict' });
 });
 
 
 // malformed padding
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-  Uint8Array.fromBase64Into('ZXhhZg=', target);
+  target.setFromBase64('ZXhhZg=');
 });
 
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-  Uint8Array.fromBase64Into('ZXhhZg=', target, { lastChunkHandling: 'loose' });
+  target.setFromBase64('ZXhhZg=', { lastChunkHandling: 'loose' });
 });
 
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('ZXhhZg=', target, { lastChunkHandling: 'stop-before-partial' });
+var result = target.setFromBase64('ZXhhZg=', { lastChunkHandling: 'stop-before-partial' });
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [101, 120, 97, 255, 255, 255]);
 
 assert.throws(SyntaxError, function() {
   var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-  Uint8Array.fromBase64Into('ZXhhZg=', target, { lastChunkHandling: 'strict' });
+  target.setFromBase64('ZXhhZg=', { lastChunkHandling: 'strict' });
 });
diff --git a/test/built-ins/Uint8Array/fromBase64Into/length.js b/test/built-ins/Uint8Array/prototype/setFromBase64/length.js
similarity index 62%
rename from test/built-ins/Uint8Array/fromBase64Into/length.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/length.js
index a97be01f69..bc7a976967 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/length.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/length.js
@@ -1,15 +1,15 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
+esid: sec-uint8array.prototype.setfrombase64
 description: >
-  Uint8Array.fromBase64Into.length is 2.
+  Uint8Array.prototype.setFromBase64.length is 1.
 includes: [propertyHelper.js]
 features: [uint8array-base64]
 ---*/
 
-verifyProperty(Uint8Array.fromBase64Into, 'length', {
-  value: 2,
+verifyProperty(Uint8Array.prototype.setFromBase64, 'length', {
+  value: 1,
   enumerable: false,
   writable: false,
   configurable: true
diff --git a/test/built-ins/Uint8Array/fromHexInto/name.js b/test/built-ins/Uint8Array/prototype/setFromBase64/name.js
similarity index 59%
rename from test/built-ins/Uint8Array/fromHexInto/name.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/name.js
index 7bf3d9761f..18f124fb6a 100644
--- a/test/built-ins/Uint8Array/fromHexInto/name.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/name.js
@@ -1,15 +1,15 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
+esid: sec-uint8array.prototype.setfrombase64
 description: >
-  Uint8Array.fromHexInto.name is "fromHexInto".
+  Uint8Array.prototype.setFromBase64.name is "setFromBase64".
 includes: [propertyHelper.js]
 features: [uint8array-base64]
 ---*/
 
-verifyProperty(Uint8Array.fromHexInto, 'name', {
-  value: 'fromHexInto',
+verifyProperty(Uint8Array.prototype.setFromBase64, 'name', {
+  value: 'setFromBase64',
   enumerable: false,
   writable: false,
   configurable: true
diff --git a/test/built-ins/Uint8Array/fromBase64Into/nonconstructor.js b/test/built-ins/Uint8Array/prototype/setFromBase64/nonconstructor.js
similarity index 54%
rename from test/built-ins/Uint8Array/fromBase64Into/nonconstructor.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/nonconstructor.js
index a5e9f0ec7a..14b429f4f0 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/nonconstructor.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/nonconstructor.js
@@ -1,16 +1,16 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
+esid: sec-uint8array.prototype.setfrombase64
 description: >
-  Uint8Array.fromBase64Into is not a constructor function.
+  Uint8Array.prototype.setFromBase64 is not a constructor function.
 includes: [isConstructor.js]
 features: [uint8array-base64, Reflect.construct]
 ---*/
 
-assert(!isConstructor(Uint8Array.fromBase64Into), "Uint8Array.fromBase64Into is not a constructor");
+assert(!isConstructor(Uint8Array.prototype.setFromBase64), "Uint8Array.prototype.setFromBase64 is not a constructor");
 
 assert.throws(TypeError, function() {
   var target = new Uint8Array(10);
-  new Uint8Array.fromBase64Into('', target);
+  new target.setFromBase64('');
 });
diff --git a/test/built-ins/Uint8Array/fromBase64Into/option-coercion.js b/test/built-ins/Uint8Array/prototype/setFromBase64/option-coercion.js
similarity index 74%
rename from test/built-ins/Uint8Array/fromBase64Into/option-coercion.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/option-coercion.js
index 174712f932..fbe07427ae 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/option-coercion.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/option-coercion.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
-description: Uint8Array.fromBase64Into triggers effects of the "alphabet" and "lastChunkHandling" getters, but does not perform toString on the results
+esid: sec-uint8array.prototype.setfrombase64
+description: Uint8Array.prototype.setFromBase64 triggers effects of the "alphabet" and "lastChunkHandling" getters, but does not perform toString on the results
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
@@ -16,13 +16,13 @@ var throwyToString = {
 };
 assert.throws(TypeError, function() {
   var target = new Uint8Array([255, 255, 255]);
-  Uint8Array.fromBase64Into("Zg==", target, { alphabet: throwyToString });
+  target.setFromBase64("Zg==", { alphabet: throwyToString });
 });
 assert.sameValue(toStringCalls, 0);
 
 assert.throws(TypeError, function() {
   var target = new Uint8Array([255, 255, 255]);
-  Uint8Array.fromBase64Into("Zg==", target, { lastChunkHandling: throwyToString });
+  target.setFromBase64("Zg==", { lastChunkHandling: throwyToString });
 });
 assert.sameValue(toStringCalls, 0);
 
@@ -36,7 +36,7 @@ Object.defineProperty(base64UrlOptions, "alphabet", {
   }
 });
 var target = new Uint8Array([255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into("x-_y", target, base64UrlOptions);
+var result = target.setFromBase64("x-_y", base64UrlOptions);
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [199, 239, 242, 255]);
@@ -51,7 +51,7 @@ Object.defineProperty(strictOptions, "lastChunkHandling", {
   }
 });
 var target = new Uint8Array([255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into("Zg==", target, strictOptions);
+var result = target.setFromBase64("Zg==", strictOptions);
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 1);
 assert.compareArray(target, [102, 255, 255, 255]);
diff --git a/test/built-ins/Uint8Array/fromBase64Into/results.js b/test/built-ins/Uint8Array/prototype/setFromBase64/results.js
similarity index 90%
rename from test/built-ins/Uint8Array/fromBase64Into/results.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/results.js
index 35b02b4078..cfd87afc01 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/results.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/results.js
@@ -1,7 +1,7 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
+esid: sec-uint8array.prototype.setfrombase64
 description: Conversion of base64 strings to Uint8Arrays
 includes: [compareArray.js]
 features: [uint8array-base64]
@@ -21,7 +21,7 @@ var standardBase64Vectors = [
 standardBase64Vectors.forEach(function (pair) {
   var allFF = [255, 255, 255, 255, 255, 255, 255, 255];
   var target = new Uint8Array(allFF);
-  var result = Uint8Array.fromBase64Into(pair[0], target);
+  var result = target.setFromBase64(pair[0]);
   assert.sameValue(result.read, pair[0].length);
   assert.sameValue(result.written, pair[1].length);
 
diff --git a/test/built-ins/Uint8Array/fromBase64Into/string-coercion.js b/test/built-ins/Uint8Array/prototype/setFromBase64/string-coercion.js
similarity index 79%
rename from test/built-ins/Uint8Array/fromBase64Into/string-coercion.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/string-coercion.js
index 17ad8b48f6..22499d3493 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/string-coercion.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/string-coercion.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
-description: Uint8Array.fromBase64Into throws if its first argument is not a string
+esid: sec-uint8array.prototype.setfrombase64
+description: Uint8Array.prototype.setFromBase64 throws if its first argument is not a string
 features: [uint8array-base64]
 ---*/
 
@@ -16,7 +16,7 @@ var throwyToString = {
 
 assert.throws(TypeError, function() {
   var target = new Uint8Array(10);
-  Uint8Array.fromBase64Into(throwyToString, target);
+  target.setFromBase64(throwyToString);
 });
 assert.sameValue(toStringCalls, 0);
 
@@ -37,7 +37,7 @@ Object.defineProperty(touchyOptions, "lastChunkHandling", {
 });
 assert.throws(TypeError, function() {
   var target = new Uint8Array(10);
-  Uint8Array.fromBase64Into(throwyToString, target, touchyOptions);
+  target.setFromBase64(throwyToString, touchyOptions);
 });
 assert.sameValue(toStringCalls, 0);
 assert.sameValue(optionAccesses, 0);
diff --git a/test/built-ins/Uint8Array/fromBase64Into/subarray.js b/test/built-ins/Uint8Array/prototype/setFromBase64/subarray.js
similarity index 71%
rename from test/built-ins/Uint8Array/fromBase64Into/subarray.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/subarray.js
index 6c5bb95e54..5c864aab21 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/subarray.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/subarray.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
-description: Uint8Array.fromBase64Into takes into account the offset of the target Uint8Array
+esid: sec-uint8array.prototype.setfrombase64
+description: Uint8Array.prototype.setFromBase64 takes into account the offset of the target Uint8Array
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
@@ -10,7 +10,7 @@ features: [uint8array-base64]
 var base = new Uint8Array([255, 255, 255, 255, 255, 255, 255]);
 var subarray = base.subarray(2, 5);
 
-var result = Uint8Array.fromBase64Into('Zm9vYmFy', subarray);
+var result = subarray.setFromBase64('Zm9vYmFy');
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(subarray, [102, 111, 111]);
diff --git a/test/built-ins/Uint8Array/fromBase64Into/target-size.js b/test/built-ins/Uint8Array/prototype/setFromBase64/target-size.js
similarity index 73%
rename from test/built-ins/Uint8Array/fromBase64Into/target-size.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/target-size.js
index 4b44c9eaef..5d03f060e8 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/target-size.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/target-size.js
@@ -1,64 +1,64 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64
-description: Uint8Array.fromBase64Into behavior when target buffer is small
+esid: sec-uint8array.prototype.setfrombase64
+description: Uint8Array.prototype.setFromBase64 behavior when target buffer is small
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
 
 // buffer too small
 var target = new Uint8Array([255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmFy', target);
+var result = target.setFromBase64('Zm9vYmFy');
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [102, 111, 111, 255, 255]);
 
 // buffer too small, padded
 var target = new Uint8Array([255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmE=', target);
+var result = target.setFromBase64('Zm9vYmE=');
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [102, 111, 111, 255]);
 
 // buffer exact
 var target = new Uint8Array([255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmFy', target);
+var result = target.setFromBase64('Zm9vYmFy');
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 6);
 assert.compareArray(target, [102, 111, 111, 98, 97, 114]);
 
 // buffer exact, padded
 var target = new Uint8Array([255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmE=', target);
+var result = target.setFromBase64('Zm9vYmE=');
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 5);
 assert.compareArray(target, [102, 111, 111, 98, 97]);
 
 // buffer exact, not padded
 var target = new Uint8Array([255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmE', target);
+var result = target.setFromBase64('Zm9vYmE');
 assert.sameValue(result.read, 7);
 assert.sameValue(result.written, 5);
 assert.compareArray(target, [102, 111, 111, 98, 97]);
 
 // buffer exact, padded, stop-before-partial
 var target = new Uint8Array([255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmE=', target, { lastChunkHandling: 'stop-before-partial' });
+var result = target.setFromBase64('Zm9vYmE=', { lastChunkHandling: 'stop-before-partial' });
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 5);
 assert.compareArray(target, [102, 111, 111, 98, 97]);
 
 // buffer exact, not padded, stop-before-partial
 var target = new Uint8Array([255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmE', target, { lastChunkHandling: 'stop-before-partial' });
+var result = target.setFromBase64('Zm9vYmE', { lastChunkHandling: 'stop-before-partial' });
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [102, 111, 111, 255, 255]);
 
 // buffer too large
 var target = new Uint8Array([255, 255, 255, 255, 255, 255, 255]);
-var result = Uint8Array.fromBase64Into('Zm9vYmFy', target);
+var result = target.setFromBase64('Zm9vYmFy');
 assert.sameValue(result.read, 8);
 assert.sameValue(result.written, 6);
 assert.compareArray(target, [102, 111, 111, 98, 97, 114, 255]);
diff --git a/test/built-ins/Uint8Array/fromBase64Into/whitespace.js b/test/built-ins/Uint8Array/prototype/setFromBase64/whitespace.js
similarity index 76%
rename from test/built-ins/Uint8Array/fromBase64Into/whitespace.js
rename to test/built-ins/Uint8Array/prototype/setFromBase64/whitespace.js
index 8ba0b01064..38bcb3d3a0 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/whitespace.js
+++ b/test/built-ins/Uint8Array/prototype/setFromBase64/whitespace.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
-description: Uint8Array.fromBase64Into ignores ASCII whitespace in the input
+esid: sec-uint8array.prototype.setfrombase64
+description: Uint8Array.prototype.setFromBase64 ignores ASCII whitespace in the input
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
@@ -16,7 +16,7 @@ var whitespaceKinds = [
 ];
 whitespaceKinds.forEach(function(pair) {
   var target = new Uint8Array([255, 255, 255]);
-  var result = Uint8Array.fromBase64Into(pair[0], target);
+  var result = target.setFromBase64(pair[0]);
   assert.sameValue(result.read, 5);
   assert.sameValue(result.written, 1);
   assert.compareArray(target, [102, 255, 255], "ascii whitespace: " + pair[1]);
diff --git a/test/built-ins/Uint8Array/fromBase64Into/descriptor.js b/test/built-ins/Uint8Array/prototype/setFromHex/descriptor.js
similarity index 62%
rename from test/built-ins/Uint8Array/fromBase64Into/descriptor.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/descriptor.js
index 672a29cb6a..080cda9411 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/descriptor.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/descriptor.js
@@ -1,14 +1,14 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
+esid: sec-uint8array.prototype.setfromhex
 description: >
-  Uint8Array.fromBase64Into has default data property attributes.
+  Uint8Array.prototype.setFromHex has default data property attributes.
 includes: [propertyHelper.js]
 features: [uint8array-base64]
 ---*/
 
-verifyProperty(Uint8Array, 'fromBase64Into', {
+verifyProperty(Uint8Array.prototype, 'setFromHex', {
   enumerable: false,
   writable: true,
   configurable: true
diff --git a/test/built-ins/Uint8Array/fromHexInto/detached-buffer.js b/test/built-ins/Uint8Array/prototype/setFromHex/detached-buffer.js
similarity index 67%
rename from test/built-ins/Uint8Array/fromHexInto/detached-buffer.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/detached-buffer.js
index 0da1767acd..6f77c4de47 100644
--- a/test/built-ins/Uint8Array/fromHexInto/detached-buffer.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/detached-buffer.js
@@ -1,14 +1,14 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
-description: Uint8Array.fromHexInto does not write to or error on detatched buffers
+esid: sec-uint8array.prototype.setfromhex
+description: Uint8Array.prototype.setFromHex does not write to or error on detatched buffers
 includes: [detachArrayBuffer.js]
 features: [uint8array-base64]
 ---*/
 
 var target = new Uint8Array([255, 255, 255]);
 $DETACHBUFFER(target.buffer);
-var result = Uint8Array.fromHexInto('aa', target);
+var result = target.setFromHex('aa');
 assert.sameValue(result.read, 0);
 assert.sameValue(result.written, 0);
diff --git a/test/built-ins/Uint8Array/fromHexInto/illegal-characters.js b/test/built-ins/Uint8Array/prototype/setFromHex/illegal-characters.js
similarity index 74%
rename from test/built-ins/Uint8Array/fromHexInto/illegal-characters.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/illegal-characters.js
index 3b623f2197..970866078f 100644
--- a/test/built-ins/Uint8Array/fromHexInto/illegal-characters.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/illegal-characters.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
-description: Uint8Array.fromHexInto throws a SyntaxError when input has non-hex characters
+esid: sec-uint8array.prototype.setfromhex
+description: Uint8Array.prototype.setFromHex throws a SyntaxError when input has non-hex characters
 features: [uint8array-base64]
 ---*/
 
@@ -21,6 +21,6 @@ var illegal = [
 illegal.forEach(function(value) {
   assert.throws(SyntaxError, function() {
     var target = new Uint8Array([255, 255, 255, 255, 255]);
-    Uint8Array.fromHexInto(value, target);
+    target.setFromHex(value);
   });
 });
diff --git a/test/built-ins/Uint8Array/fromHexInto/length.js b/test/built-ins/Uint8Array/prototype/setFromHex/length.js
similarity index 63%
rename from test/built-ins/Uint8Array/fromHexInto/length.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/length.js
index d41f524286..3754878ffc 100644
--- a/test/built-ins/Uint8Array/fromHexInto/length.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/length.js
@@ -1,15 +1,15 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
+esid: sec-uint8array.prototype.setfromhex
 description: >
-  Uint8Array.fromHexInto.length is 2.
+  Uint8Array.prototype.setFromHex.length is 1.
 includes: [propertyHelper.js]
 features: [uint8array-base64]
 ---*/
 
-verifyProperty(Uint8Array.fromHexInto, 'length', {
-  value: 2,
+verifyProperty(Uint8Array.prototype.setFromHex, 'length', {
+  value: 1,
   enumerable: false,
   writable: false,
   configurable: true
diff --git a/test/built-ins/Uint8Array/fromBase64Into/name.js b/test/built-ins/Uint8Array/prototype/setFromHex/name.js
similarity index 61%
rename from test/built-ins/Uint8Array/fromBase64Into/name.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/name.js
index dcdc49c99b..808ac1645e 100644
--- a/test/built-ins/Uint8Array/fromBase64Into/name.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/name.js
@@ -1,15 +1,15 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.frombase64into
+esid: sec-uint8array.prototype.setfromhex
 description: >
-  Uint8Array.fromBase64Into.name is "fromBase64Into".
+  Uint8Array.prototype.setFromHex.name is "setFromHex".
 includes: [propertyHelper.js]
 features: [uint8array-base64]
 ---*/
 
-verifyProperty(Uint8Array.fromBase64Into, 'name', {
-  value: 'fromBase64Into',
+verifyProperty(Uint8Array.prototype.setFromHex, 'name', {
+  value: 'setFromHex',
   enumerable: false,
   writable: false,
   configurable: true
diff --git a/test/built-ins/Uint8Array/fromHexInto/nonconstructor.js b/test/built-ins/Uint8Array/prototype/setFromHex/nonconstructor.js
similarity index 57%
rename from test/built-ins/Uint8Array/fromHexInto/nonconstructor.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/nonconstructor.js
index 5b9ccf7966..435ce51f5a 100644
--- a/test/built-ins/Uint8Array/fromHexInto/nonconstructor.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/nonconstructor.js
@@ -1,16 +1,16 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
+esid: sec-uint8array.prototype.setfromhex
 description: >
-  Uint8Array.fromHexInto is not a constructor function.
+  Uint8Array.prototype.setFromHex is not a constructor function.
 includes: [isConstructor.js]
 features: [uint8array-base64, Reflect.construct]
 ---*/
 
-assert(!isConstructor(Uint8Array.fromHexInto), "Uint8Array.fromHexInto is not a constructor");
+assert(!isConstructor(Uint8Array.prototype.setFromHex), "target.setFromHex is not a constructor");
 
 assert.throws(TypeError, function() {
   var target = new Uint8Array(10);
-  new Uint8Array.fromHexInto('', target);
+  new target.setFromHex('');
 });
diff --git a/test/built-ins/Uint8Array/fromHexInto/results.js b/test/built-ins/Uint8Array/prototype/setFromHex/results.js
similarity index 90%
rename from test/built-ins/Uint8Array/fromHexInto/results.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/results.js
index 41256e1baf..2359a9060d 100644
--- a/test/built-ins/Uint8Array/fromHexInto/results.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/results.js
@@ -1,7 +1,7 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
+esid: sec-uint8array.prototype.setfromhex
 description: Conversion of hex strings to Uint8Arrays
 includes: [compareArray.js]
 features: [uint8array-base64]
@@ -22,7 +22,7 @@ var cases = [
 cases.forEach(function (pair) {
   var allFF = [255, 255, 255, 255, 255, 255, 255, 255];
   var target = new Uint8Array(allFF);
-  var result = Uint8Array.fromHexInto(pair[0], target);
+  var result = target.setFromHex(pair[0]);
   assert.sameValue(result.read, pair[0].length);
   assert.sameValue(result.written, pair[1].length);
 
diff --git a/test/built-ins/Uint8Array/fromHexInto/string-coercion.js b/test/built-ins/Uint8Array/prototype/setFromHex/string-coercion.js
similarity index 72%
rename from test/built-ins/Uint8Array/fromHexInto/string-coercion.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/string-coercion.js
index e7f08661ca..822ee7a349 100644
--- a/test/built-ins/Uint8Array/fromHexInto/string-coercion.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/string-coercion.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
-description: Uint8Array.fromHexInto throws if its first argument is not a string
+esid: sec-uint8array.prototype.setfromhex
+description: Uint8Array.prototype.setFromHex throws if its first argument is not a string
 features: [uint8array-base64]
 ---*/
 
@@ -16,6 +16,6 @@ var throwyToString = {
 
 assert.throws(TypeError, function() {
   var target = new Uint8Array(10);
-  Uint8Array.fromHexInto(throwyToString, target);
+  target.setFromHex(throwyToString);
 });
 assert.sameValue(toStringCalls, 0);
diff --git a/test/built-ins/Uint8Array/fromHexInto/subarray.js b/test/built-ins/Uint8Array/prototype/setFromHex/subarray.js
similarity index 72%
rename from test/built-ins/Uint8Array/fromHexInto/subarray.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/subarray.js
index 92330afad2..3868ace014 100644
--- a/test/built-ins/Uint8Array/fromHexInto/subarray.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/subarray.js
@@ -1,8 +1,8 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
-description: Uint8Array.fromHexInto takes into account the offset of the target Uint8Array
+esid: sec-uint8array.prototype.setfromhex
+description: Uint8Array.prototype.setFromHex takes into account the offset of the target Uint8Array
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
@@ -10,7 +10,7 @@ features: [uint8array-base64]
 var base = new Uint8Array([255, 255, 255, 255, 255, 255, 255]);
 var subarray = base.subarray(2, 5);
 
-var result = Uint8Array.fromHexInto('aabbcc', subarray);
+var result = subarray.setFromHex('aabbcc');
 assert.sameValue(result.read, 6);
 assert.sameValue(result.written, 3);
 assert.compareArray(subarray, [170, 187, 204]);
diff --git a/test/built-ins/Uint8Array/fromHexInto/target-size.js b/test/built-ins/Uint8Array/prototype/setFromHex/target-size.js
similarity index 73%
rename from test/built-ins/Uint8Array/fromHexInto/target-size.js
rename to test/built-ins/Uint8Array/prototype/setFromHex/target-size.js
index b56a8a5905..b794a44ee8 100644
--- a/test/built-ins/Uint8Array/fromHexInto/target-size.js
+++ b/test/built-ins/Uint8Array/prototype/setFromHex/target-size.js
@@ -1,29 +1,29 @@
 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-esid: sec-uint8array.fromhexinto
-description: Uint8Array.fromHexInto behavior when target buffer is small
+esid: sec-uint8array.prototype.setfromhex
+description: Uint8Array.prototype.setFromHex behavior when target buffer is small
 includes: [compareArray.js]
 features: [uint8array-base64]
 ---*/
 
 // buffer too small
 var target = new Uint8Array([255, 255]);
-var result = Uint8Array.fromHexInto('aabbcc', target);
+var result = target.setFromHex('aabbcc');
 assert.sameValue(result.read, 4);
 assert.sameValue(result.written, 2);
 assert.compareArray(target, [170, 187]);
 
 // buffer exact
 var target = new Uint8Array([255, 255, 255]);
-var result = Uint8Array.fromHexInto('aabbcc', target);
+var result = target.setFromHex('aabbcc');
 assert.sameValue(result.read, 6);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [170, 187, 204]);
 
 // buffer too large
 var target = new Uint8Array([255, 255, 255, 255]);
-var result = Uint8Array.fromHexInto('aabbcc', target);
+var result = target.setFromHex('aabbcc');
 assert.sameValue(result.read, 6);
 assert.sameValue(result.written, 3);
 assert.compareArray(target, [170, 187, 204, 255]);