diff --git a/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-eval-indirect.js b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-eval-indirect.js
new file mode 100644
index 0000000000..e3cc5a6d4f
--- /dev/null
+++ b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-eval-indirect.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private getter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let classStringExpression = `(
+class {
+  get #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m;
+  }
+}
+)`;
+
+let createAndInstantiateClass = function (_eval) {
+  return new (_eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass(eval);
+let c2 = createAndInstantiateClass(eval);
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-eval.js b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-eval.js
new file mode 100644
index 0000000000..e695ea2106
--- /dev/null
+++ b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-eval.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private getter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let classStringExpression = `(
+class {
+  get #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m;
+  }
+}
+)`;
+
+let createAndInstantiateClass = function () {
+  return new (eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-factory.js b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-factory.js
new file mode 100644
index 0000000000..732cb1904f
--- /dev/null
+++ b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-factory.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private getter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let createAndInstantiateClass = function () {
+  const C = class {
+    get #m() { return 'test262'; }
+
+    access(o) {
+      return o.#m;
+    }
+  }
+
+  let c = new C();
+  return c;
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-function-ctor.js b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-function-ctor.js
new file mode 100644
index 0000000000..55f7406ca4
--- /dev/null
+++ b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-function-ctor.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private getter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let classStringExpression = `
+return class {
+  get m() { return 'test262'; }
+
+  access(o) {
+    return o.m;
+  }
+}
+`;
+
+let createAndInstantiateClass = function () {
+  let classFactoryFunction = new Function(classStringExpression);
+  let Class = classFactoryFunction();
+  return new Class();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-realm-function-ctor.js b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-realm-function-ctor.js
new file mode 100644
index 0000000000..5dcf1e31ef
--- /dev/null
+++ b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-realm-function-ctor.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private getter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let classStringExpression = `
+return class {
+  get #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m;
+  }
+}
+`;
+
+let createAndInstantiateClass = function () {
+  let classFactoryFunction = new ($262.createRealm().global.Function)(classStringExpression);
+  let Class = classFactoryFunction();
+  return new Class();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-realm.js b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-realm.js
new file mode 100644
index 0000000000..a28754571f
--- /dev/null
+++ b/test/language/expressions/class/private-getter-brand-check-multiple-evaluations-of-class-realm.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private getter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let eval1 = $262.createRealm().global.eval;
+let eval2 = $262.createRealm().global.eval;
+
+let classStringExpression = `(
+class {
+  get #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m;
+  }
+}
+)`;
+
+let createAndInstantiateClass = function (_eval) {
+  return new (_eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass(eval1);
+let c2 = createAndInstantiateClass(eval2);
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-eval-indirect.js b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-eval-indirect.js
new file mode 100644
index 0000000000..eac02682f2
--- /dev/null
+++ b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-eval-indirect.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private method)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let classStringExpression = `(
+class C {
+  #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m();
+  }
+}
+)`;
+
+let createAndInstantiateClass = function (_eval) {
+  return new (_eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass(eval);
+let c2 = createAndInstantiateClass(eval);
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-eval.js b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-eval.js
new file mode 100644
index 0000000000..4cc49d8cb1
--- /dev/null
+++ b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-eval.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private method)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let classStringExpression = `(
+class C {
+  #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m();
+  }
+}
+)`;
+
+let createAndInstantiateClass = function () {
+  return new (eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-factory.js b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-factory.js
new file mode 100644
index 0000000000..094165ed68
--- /dev/null
+++ b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-factory.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private method)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let createAndInstantiateClass = function () {
+  const C = class {
+    #m() { return 'test262'; }
+
+    access(o) {
+      return o.#m();
+    }
+  }
+
+  return new C();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-function-ctor.js b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-function-ctor.js
new file mode 100644
index 0000000000..6e23740916
--- /dev/null
+++ b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-function-ctor.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private method)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let classStringExpression = `
+return class C {
+  #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m();
+  }
+}
+`;
+
+let createAndInstantiateClass = function () {
+  let classFactoryFunction = new Function(classStringExpression);
+  let Class = classFactoryFunction();
+  return new Class();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-realm-function-ctor.js b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-realm-function-ctor.js
new file mode 100644
index 0000000000..094df6a6c6
--- /dev/null
+++ b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-realm-function-ctor.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private method)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let classStringExpression = `
+return class C {
+  #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m();
+  }
+}
+`;
+
+let createAndInstantiateClass = function () {
+  let classFactoryFunction = new ($262.createRealm().global.Function)(classStringExpression);
+  let Class = classFactoryFunction();
+  return new Class();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-realm.js b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-realm.js
new file mode 100644
index 0000000000..49657c84af
--- /dev/null
+++ b/test/language/expressions/class/private-method-brand-check-multiple-evaluations-of-class-realm.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private method)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let eval1 = $262.createRealm().global.eval;
+let eval2 = $262.createRealm().global.eval;
+
+let classStringExpression = `(
+class {
+  #m() { return 'test262'; }
+
+  access(o) {
+    return o.#m();
+  }
+}
+)`;
+
+let createAndInstantiateClass = function (_eval) {
+  return new (_eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass(eval1);
+let c2 = createAndInstantiateClass(eval2);
+
+assert.sameValue(c1.access(c1), 'test262');
+assert.sameValue(c2.access(c2), 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2);
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1);
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-eval-indirect.js b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-eval-indirect.js
new file mode 100644
index 0000000000..18e5558e5a
--- /dev/null
+++ b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-eval-indirect.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private setter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let classStringExpression = `(
+class {
+  set #m(v) { this._v = v; }
+
+  access(o, v) {
+    o.#m = v;
+  }
+}
+)`;
+
+let createAndInstantiateClass = function (_eval) {
+  return new (_eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass(eval);
+let c2 = createAndInstantiateClass(eval);
+
+c1.access(c1, 'test262');
+assert.sameValue(c1._v, 'test262');
+c2.access(c2, 'test262');
+assert.sameValue(c2._v, 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2, 'foo');
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1, 'foo');
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-eval.js b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-eval.js
new file mode 100644
index 0000000000..091cff4af9
--- /dev/null
+++ b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-eval.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private setter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let classStringExpression = `(
+class {
+  set #m(v) { this._v = v; }
+
+  access(o, v) {
+    o.#m = v;
+  }
+}
+)`;
+
+let createAndInstantiateClass = function () {
+  return new (eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+c1.access(c1, 'test262');
+assert.sameValue(c1._v, 'test262');
+c2.access(c2, 'test262');
+assert.sameValue(c2._v, 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2, 'foo');
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1, 'foo');
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-factory.js b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-factory.js
new file mode 100644
index 0000000000..58771e30f6
--- /dev/null
+++ b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-factory.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private setter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let createAndInstantiateClass = function () {
+  const C = class {
+    set #m(v) { this._v = v; }
+
+    access(o, v) {
+      o.#m = v;
+    }
+  }
+
+  return new C();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+c1.access(c1, 'test262');
+assert.sameValue(c1._v, 'test262');
+c2.access(c2, 'test262');
+assert.sameValue(c2._v, 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2, 'foo');
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1, 'foo');
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-function-ctor.js b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-function-ctor.js
new file mode 100644
index 0000000000..86722d023d
--- /dev/null
+++ b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-function-ctor.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private setter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let classStringExpression = `
+return class {
+  set #m(v) { this._v = v; }
+
+  access(o, v) {
+    o.#m = v;
+  }
+}
+`;
+
+let createAndInstantiateClass = function () {
+  let classFactoryFunction = new Function(classStringExpression);
+  let Class = classFactoryFunction();
+  return new Class();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+c1.access(c1, 'test262');
+assert.sameValue(c1._v, 'test262');
+c2.access(c2, 'test262');
+assert.sameValue(c2._v, 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2, 'foo');
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1, 'foo');
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-realm-function-ctor.js b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-realm-function-ctor.js
new file mode 100644
index 0000000000..0c5eff4b1b
--- /dev/null
+++ b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-realm-function-ctor.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private setter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+---*/
+
+let classStringExpression = `
+return class {
+  set #m(v) { this._v = v; }
+
+  access(o, v) {
+    o.#m = v;
+  }
+}
+`;
+
+let createAndInstantiateClass = function () {
+  let classFactoryFunction = new ($262.createRealm().global.Function)(classStringExpression);
+  let Class = classFactoryFunction();
+  return new Class();
+};
+
+let c1 = createAndInstantiateClass();
+let c2 = createAndInstantiateClass();
+
+c1.access(c1, 'test262');
+assert.sameValue(c1._v, 'test262');
+c2.access(c2, 'test262');
+assert.sameValue(c2._v, 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2, 'foo');
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1, 'foo');
+}, 'invalid access of c2 private method');
diff --git a/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-realm.js b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-realm.js
new file mode 100644
index 0000000000..35a42d3643
--- /dev/null
+++ b/test/language/expressions/class/private-setter-brand-check-multiple-evaluations-of-class-realm.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Every new evaluation of a class creates a different brand (private setter)
+esid: sec-privatefieldget
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    11. Let proto be ObjectCreate(protoParent).
+    ...
+    31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor",
+      a. Set F.[[PrivateBrand]] to proto.
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+features: [class, class-methods-private]
+flags: [noStrict]
+---*/
+
+let eval1 = $262.createRealm().global.eval;
+let eval2 = $262.createRealm().global.eval;
+
+let classStringExpression = `(
+class {
+  set #m(v) { this._v = v; }
+
+  access(o, v) {
+    o.#m = v;
+  }
+}
+)`;
+
+let createAndInstantiateClass = function (_eval) {
+  return new (_eval(classStringExpression));
+};
+
+let c1 = createAndInstantiateClass(eval1);
+let c2 = createAndInstantiateClass(eval2);
+
+c1.access(c1, 'test262');
+assert.sameValue(c1._v, 'test262');
+c2.access(c2, 'test262');
+assert.sameValue(c2._v, 'test262');
+
+assert.throws(TypeError, function() {
+  c1.access(c2, 'foo');
+}, 'invalid access of c1 private method');
+
+assert.throws(TypeError, function() {
+  c2.access(c1, 'foo');
+}, 'invalid access of c2 private method');
diff --git a/test/language/statements/class/elements/private-getter-brand-check-multiple-evaluations-of-class.js b/test/language/statements/class/elements/private-getter-brand-check-multiple-evaluations-of-class.js
index b20ba45630..2774984b19 100644
--- a/test/language/statements/class/elements/private-getter-brand-check-multiple-evaluations-of-class.js
+++ b/test/language/statements/class/elements/private-getter-brand-check-multiple-evaluations-of-class.js
@@ -22,12 +22,12 @@ features: [class, class-methods-private]
 let createAndInstantiateClass = function () {
   class C {
     get #m() { return 'test262'; }
-    
+
     access(o) {
       return o.#m;
     }
   }
-  
+
   let c = new C();
   return c;
 };