diff --git a/test/built-ins/AggregateError/prototype/toString/get-message-abrupt.js b/test/built-ins/AggregateError/prototype/toString/get-message-abrupt.js
deleted file mode 100644
index b70c907e449..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message-abrupt.js
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Gets the Object message, returning abrupt completion
-info: |
-  AggregateError.prototype.toString ( )
-
-  ...
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var called = 0;
-var nameCalled = 0;
-var obj = {
-  get name() {
-    nameCalled += 1;
-  },
-  get message() {
-    called += 1;
-    throw new Test262Error();
-  }
-};
-
-assert.throws(Test262Error, () => {
-  method.call(obj);
-});
-
-assert.sameValue(called, 1);
-assert.sameValue(nameCalled, 1);
diff --git a/test/built-ins/AggregateError/prototype/toString/get-message-empty-string.js b/test/built-ins/AggregateError/prototype/toString/get-message-empty-string.js
deleted file mode 100644
index 3aebaeb05c5..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message-empty-string.js
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  If message value is the empty string, return name
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var result = method.call({
-  name: 'the name',
-  message: '',
-});
-
-assert.sameValue(result, 'the name', 'explicit from own property');
-
-result = false;
-result = method.call(Object.create({
-  name: 'the name',
-  message: '',
-}));
-
-assert.sameValue(result, 'the name', 'explicit from prototype');
-
-result = false;
-result = method.call({
-  name: 'the name',
-  message: undefined,
-});
-
-assert.sameValue(result, 'the name', 'message is undefined');
-
-result = false;
-result = method.call({
-  name: 'the name!',
-  message: { toString() { return ''; } },
-});
-
-assert.sameValue(result, 'the name!', 'return name');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-message-toString-object.js b/test/built-ins/AggregateError/prototype/toString/get-message-toString-object.js
deleted file mode 100644
index c6de5b6ecbe..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message-toString-object.js
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString on the message object value
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError, Symbol.toPrimitive]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var called = 0;
-var obj = {
-  message: {
-    [Symbol.toPrimitive]() {
-      called += 1;
-      return 'from @@toPrimitive';
-    },
-    toString() {
-      throw new Test262Error();
-    },
-    valueOf() {
-      throw new Test262Error();
-    },
-  },
-  name: '',
-};
-
-var result = method.call(obj);
-
-assert.sameValue(called, 1);
-assert.sameValue(result, 'from @@toPrimitive');
-
-called = 0;
-obj = {
-  message: {
-    [Symbol.toPrimitive]: undefined,
-    toString() {
-      called += 1;
-      return 'from the toString method';
-    },
-    valueOf() {
-      throw new Test262Error();
-    },
-  },
-  name: '',
-};
-result = false;
-
-result = method.call(obj);
-assert.sameValue(called, 1);
-assert.sameValue(result, 'from the toString method');
-
-called = 0;
-obj = {
-  message: {
-    [Symbol.toPrimitive]: undefined,
-    toString: undefined,
-    valueOf() {
-      called += 1;
-      return 'from the valueOf method';
-    },
-  },
-  name: '',
-};
-result = false;
-
-result = method.call(obj);
-assert.sameValue(called, 1);
-assert.sameValue(result, 'from the valueOf method');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-message-toString-symbol.js b/test/built-ins/AggregateError/prototype/toString/get-message-toString-symbol.js
deleted file mode 100644
index 2e8302a929f..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message-toString-symbol.js
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString(Symbol msg)
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError, Symbol]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var obj = { name: '', message: Symbol() };
-
-assert.throws(TypeError, function() {
-  method.call(obj);
-}, 'own property');
-
-obj = Object.create({ name: '', message: Symbol() });
-
-assert.throws(TypeError, function() {
-  method.call(obj);
-}, 'from prototype');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-message-toString-undefined.js b/test/built-ins/AggregateError/prototype/toString/get-message-toString-undefined.js
deleted file mode 100644
index 0dfb914fad6..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message-toString-undefined.js
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString(msg) where it can return "undefined"
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var obj = {
-  message: {
-    toString() {
-      return undefined;
-    }
-  },
-  name: 'hi',
-};
-
-assert.sameValue(method.call(obj), 'hi\u003A\u0020undefined', 'with name');
-
-obj.name = '';
-
-assert.sameValue(method.call(obj), 'undefined', 'without name');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-message-toString.js b/test/built-ins/AggregateError/prototype/toString/get-message-toString.js
deleted file mode 100644
index c65c8a34bb6..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message-toString.js
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString(message)
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var obj = { name: '' };
-
-obj.message = 0;
-assert.sameValue(method.call(obj), '0', 'Number 0');
-obj.message = null;
-assert.sameValue(method.call(obj), 'null', 'null');
-obj.message = false;
-assert.sameValue(method.call(obj), 'false', 'false');
-obj.message = true;
-assert.sameValue(method.call(obj), 'true', 'true');
-obj.message = 1;
-assert.sameValue(method.call(obj), '1', 'Number 1');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-message-undefined.js b/test/built-ins/AggregateError/prototype/toString/get-message-undefined.js
deleted file mode 100644
index c708cc97062..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message-undefined.js
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  An undefined message property value is cast to 'AggregateError'
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var result = method.call({
-  message: undefined,
-});
-
-assert.sameValue(result, 'AggregateError', 'explicit from own property');
-
-result = false;
-result = method.call({});
-
-assert.sameValue(result, 'AggregateError', 'implicit');
-
-result = false;
-result = method.call(Object.create({
-  message: undefined,
-}));
-
-assert.sameValue(result, 'AggregateError', 'explicit from prototype');
-
-result = false;
-result = method.call({
-  message: undefined,
-  name: 'a name',
-});
-
-assert.sameValue(result, 'a name', 'explicit from own property, name is set');
-
-result = false;
-result = method.call({
-  name: 'a name',
-});
-
-assert.sameValue(result, 'a name', 'implicit, name is set');
-
-result = false;
-result = method.call(Object.create({
-  message: undefined,
-  name: 'a name',
-}));
-
-assert.sameValue(result, 'a name', 'explicit from prototype, name is set');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-message.js b/test/built-ins/AggregateError/prototype/toString/get-message.js
deleted file mode 100644
index 07cb270c1f0..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-message.js
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Gets the Object message
-info: |
-  AggregateError.prototype.toString ( )
-
-  ...
-  5. Let msg be ? Get(O, "message").
-  ...
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var called = 0;
-var nameCalled = 0;
-var obj = {
-  get name() {
-    nameCalled += 1;
-  },
-  get message() {
-    called += 1;
-  }
-};
-
-method.call(obj);
-
-assert.sameValue(nameCalled, 1);
-assert.sameValue(called, 1);
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name-abrupt.js b/test/built-ins/AggregateError/prototype/toString/get-name-abrupt.js
deleted file mode 100644
index de8a27551c3..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name-abrupt.js
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Gets the Object name, returning abrupt completion
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  ...
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var called = 0;
-var obj = {
-  get name() {
-    called += 1;
-    throw new Test262Error();
-  }
-};
-
-assert.throws(Test262Error, () => {
-  method.call(obj);
-});
-
-assert.sameValue(called, 1);
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name-empty-string.js b/test/built-ins/AggregateError/prototype/toString/get-name-empty-string.js
deleted file mode 100644
index 22a9391bfad..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name-empty-string.js
+++ /dev/null
@@ -1,70 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  If name value is the empty string, return msg
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var result = method.call({
-  name: '',
-  message: 'the message',
-});
-
-assert.sameValue(result, 'the message', 'explicit from own property');
-
-result = false;
-result = method.call(Object.create({
-  name: '',
-  message: 'the message',
-}));
-
-assert.sameValue(result, 'the message', 'explicit from prototype');
-
-result = false;
-result = method.call({
-  name: '',
-  message: '',
-});
-
-assert.sameValue(result, '', 'both name and msg are the empty string');
-
-result = false;
-result = method.call({
-  name: '',
-  message: undefined,
-});
-
-assert.sameValue(result, 'message', 'return msg');
-
-result = false;
-result = method.call({
-  name: { toString() { return ''; } },
-  message: 'the message!',
-});
-
-assert.sameValue(result, 'the message!', 'own name property is cast to an empty string');
-
-result = false;
-result = method.call(Object.create({
-  name: { toString() { return ''; } },
-  message: 'the message!',
-}));
-
-assert.sameValue(result, 'the message!', 'chained name property is cast to an empty string');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name-toString-object.js b/test/built-ins/AggregateError/prototype/toString/get-name-toString-object.js
deleted file mode 100644
index 39bf62d6746..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name-toString-object.js
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString on the name object value
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError, Symbol.toPrimitive]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var called = 0;
-var obj = {
-  name: {
-    [Symbol.toPrimitive]() {
-      called += 1;
-      return 'from @@toPrimitive';
-    },
-    toString() {
-      throw new Test262Error();
-    },
-    valueOf() {
-      throw new Test262Error();
-    },
-  },
-  message: '',
-};
-
-var result = method.call(obj);
-
-assert.sameValue(called, 1);
-assert.sameValue(result, 'from @@toPrimitive');
-
-called = 0;
-obj = {
-  name: {
-    [Symbol.toPrimitive]: undefined,
-    toString() {
-      called += 1;
-      return 'from the toString method';
-    },
-    valueOf() {
-      throw new Test262Error();
-    },
-  },
-  message: '',
-};
-result = false;
-
-result = method.call(obj);
-assert.sameValue(called, 1);
-assert.sameValue(result, 'from the toString method');
-
-called = 0;
-obj = {
-  name: {
-    [Symbol.toPrimitive]: undefined,
-    toString: undefined,
-    valueOf() {
-      called += 1;
-      return 'from the valueOf method';
-    },
-  },
-  message: '',
-};
-result = false;
-
-result = method.call(obj);
-assert.sameValue(called, 1);
-assert.sameValue(result, 'from the valueOf method');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name-toString-symbol.js b/test/built-ins/AggregateError/prototype/toString/get-name-toString-symbol.js
deleted file mode 100644
index 6b17b58281b..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name-toString-symbol.js
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString(name)
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError, Symbol]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var obj = { name: Symbol(), message: '' };
-
-assert.throws(TypeError, function() {
-  method.call(obj);
-}, 'own property');
-
-obj = Object.create({ name: Symbol(), message: '' });
-assert.throws(TypeError, function() {
-  method.call(obj);
-}, 'from prototype');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name-toString-undefined.js b/test/built-ins/AggregateError/prototype/toString/get-name-toString-undefined.js
deleted file mode 100644
index 1ed8337b7b0..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name-toString-undefined.js
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString(name) where it can return "undefined"
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var obj = {
-  name: {
-    toString() {
-      return undefined;
-    }
-  },
-  message: '',
-};
-
-assert.sameValue(method.call(obj), 'undefined', 'without message');
-
-obj.message = 'lol';
-
-assert.sameValue(method.call(obj), 'undefined\u003A\u0020lol', 'with message');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name-toString.js b/test/built-ins/AggregateError/prototype/toString/get-name-toString.js
deleted file mode 100644
index 2aaf95d4758..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name-toString.js
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  ToString(name)
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var obj = { message: '' };
-
-obj.name = 0;
-assert.sameValue(method.call(obj), '0', 'Number 0');
-obj.name = null;
-assert.sameValue(method.call(obj), 'null', 'null');
-obj.name = false;
-assert.sameValue(method.call(obj), 'false', 'false');
-obj.name = true;
-assert.sameValue(method.call(obj), 'true', 'true');
-obj.name = 1;
-assert.sameValue(method.call(obj), '1', 'Number 1');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name-undefined.js b/test/built-ins/AggregateError/prototype/toString/get-name-undefined.js
deleted file mode 100644
index 01d5d2745b3..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name-undefined.js
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  An undefined name property value is cast to 'AggregateError'
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var result = method.call({
-  name: undefined,
-  message: '',
-});
-
-assert.sameValue(result, 'AggregateError', 'explicit from own property');
-
-result = false;
-result = method.call({
-  message: '',
-});
-
-assert.sameValue(result, 'AggregateError', 'implicit');
-
-result = false;
-result = method.call(Object.create({
-  name: undefined,
-  message: '',
-}));
-
-assert.sameValue(result, 'AggregateError', 'explicit from prototype');
-
-result = false;
-result = method.call({
-  name: undefined,
-  message: 'a message',
-});
-
-assert.sameValue(result, 'AggregateError\u003A\u0020a message', 'explicit from own property, message is set');
-
-result = false;
-result = method.call({
-  message: 'a message',
-});
-
-assert.sameValue(result, 'AggregateError\u003A\u0020a message', 'implicit, message is set');
-
-result = false;
-result = method.call(Object.create({
-  name: undefined,
-  message: 'a message',
-}));
-
-assert.sameValue(result, 'AggregateError\u003A\u0020a message', 'explicit from prototype, message is set');
diff --git a/test/built-ins/AggregateError/prototype/toString/get-name.js b/test/built-ins/AggregateError/prototype/toString/get-name.js
deleted file mode 100644
index 8926bc8c3d9..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/get-name.js
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Gets the Object name
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  ...
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var called = 0;
-var obj = {
-  get name() {
-    called += 1;
-  }
-};
-
-method.call(obj);
-
-assert.sameValue(called, 1);
diff --git a/test/built-ins/AggregateError/prototype/toString/length.js b/test/built-ins/AggregateError/prototype/toString/length.js
deleted file mode 100644
index 949e053a263..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/length.js
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Property descriptor of AggregateError.prototype.toString.length
-info: |
-  AggregateError.prototype.toString
-
-  17 ECMAScript Standard Built-in Objects:
-    Every built-in Function object, including constructors, has a length
-    property whose value is an integer. Unless otherwise specified, this
-    value is equal to the largest number of named arguments shown in the
-    subclause headings for the function description, including optional
-    parameters. However, rest parameters shown using the form “...name”
-    are not included in the default argument count.
-
-    Unless otherwise specified, the length property of a built-in Function
-    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
-    [[Configurable]]: true }.
-includes: [propertyHelper.js]
-features: [AggregateError]
----*/
-
-verifyProperty(AggregateError.prototype.toString, 'length', {
-  value: 0,
-  enumerable: false,
-  writable: false,
-  configurable: true
-});
diff --git a/test/built-ins/AggregateError/prototype/toString/name.js b/test/built-ins/AggregateError/prototype/toString/name.js
deleted file mode 100644
index f44abe5e3de..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/name.js
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Property descriptor of AggregateError.prototype.toString.name
-info: |
-  AggregateError.prototype.toString
-
-  17 ECMAScript Standard Built-in Objects
-
-  Functions that are specified as get or set accessor functions of built-in
-  properties have "get " or "set " prepended to the property name string.
-includes: [propertyHelper.js]
-features: [AggregateError]
----*/
-
-verifyProperty(AggregateError.prototype.toString, 'name', {
-  value: 'toString',
-  enumerable: false,
-  writable: false,
-  configurable: true
-});
diff --git a/test/built-ins/AggregateError/prototype/toString/prop-desc.js b/test/built-ins/AggregateError/prototype/toString/prop-desc.js
deleted file mode 100644
index a5cc8c6a4a7..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/prop-desc.js
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Property descriptor of AggregateError.prototype.toString
-info: |
-  ES Section 17
-
-  Every other data property (...) has the attributes { [[Writable]]: true, [[Enumerable]]: false,
-  [[Configurable]]: true } unless otherwise specified.
-includes: [propertyHelper.js]
-features: [AggregateError]
----*/
-
-assert.sameValue(typeof AggregateError.prototype.toString, 'function');
-
-verifyProperty(AggregateError.prototype, 'toString', {
-  configurable: true,
-  writable: true,
-  enumerable: false,
-});
diff --git a/test/built-ins/AggregateError/prototype/toString/returns-string.js b/test/built-ins/AggregateError/prototype/toString/returns-string.js
deleted file mode 100644
index b528719974d..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/returns-string.js
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Returns a string concatenating name and msg when both are defined
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-  3. Let name be ? Get(O, "name").
-  4. If name is undefined, set name to "AggregateError"; otherwise set name to ? ToString(name).
-  5. Let msg be ? Get(O, "message").
-  6. If msg is undefined, set msg to the empty String; otherwise set msg to ? ToString(msg).
-  7. If name is the empty String, return msg.
-  8. If msg is the empty String, return name.
-  9. Return the string-concatenation of name, the code unit 0x003A (COLON), the code unit 0x0020 (SPACE) and msg.
-features: [AggregateError]
----*/
-
-var method = AggregateError.prototype.toString;
-
-var obj = {
-  name: 'foo',
-  message: 'bar',
-};
-
-assert.sameValue(method.call(obj), 'foo\u003A\u0020bar');
-
-obj = new AggregateError(['a', 'b', 'c'], 'Hello World!');
-
-assert.sameValue(method.call(obj), 'AggregateError\u003A\u0020Hello World!');
-
-obj = new AggregateError(['a', 'b', 'c']);
-
-assert.sameValue(method.call(obj), 'AggregateError');
diff --git a/test/built-ins/AggregateError/prototype/toString/this-not-object-throws.js b/test/built-ins/AggregateError/prototype/toString/this-not-object-throws.js
deleted file mode 100644
index 22b958f5816..00000000000
--- a/test/built-ins/AggregateError/prototype/toString/this-not-object-throws.js
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright (C) 2019 Leo Balter. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-aggregate-error.prototype.toString
-description: >
-  Property descriptor of AggregateError.prototype.toString
-info: |
-  AggregateError.prototype.toString ( )
-
-  1. Let O be the this value.
-  2. If Type(O) is not Object, throw a TypeError exception.
-features: [AggregateError, Symbol]
----*/
-
-var method = AggregateError.prototype.toString;
-
-assert.throws(TypeError, () => {
-  method.call(undefined);
-}, 'undefined');
-
-assert.throws(TypeError, () => {
-  method.call(null);
-}, 'null');
-
-assert.throws(TypeError, () => {
-  method.call(false);
-}, 'false');
-
-assert.throws(TypeError, () => {
-  method.call(true);
-}, 'true');
-
-assert.throws(TypeError, () => {
-  method.call(42);
-}, 'number');
-
-assert.throws(TypeError, () => {
-  method.call('string');
-}, 'string');
-
-var s = Symbol();
-assert.throws(TypeError, () => {
-  method.call(s);
-}, 'symbol');