diff --git a/src/class-fields/init-err-contains-boolean.case b/src/class-fields/init-err-contains-boolean.case
new file mode 100644
index 0000000000..605cdd32dd
--- /dev/null
+++ b/src/class-fields/init-err-contains-boolean.case
@@ -0,0 +1,28 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: Syntax error if `arguments` used in class field
+info: |
+  Static Semantics: Early Errors
+
+    FieldDefinition:
+      PropertyNameInitializeropt
+
+    - It is a Syntax Error if ContainsArguments of Initializer is true.
+
+  Static Semantics: ContainsArguments
+    IdentifierReference : Identifier
+
+    1. If the StringValue of Identifier is "arguments", return true.
+    ...
+    For all other grammatical productions, recurse on all nonterminals. If any piece returns true, then return true. Otherwise return false.
+features: [class-fields]
+negative:
+  type: SyntaxError
+  phase: early
+template: initializer-error
+---*/
+
+//- initializer
+arguments
diff --git a/src/class-fields/init-err-contains-super.case b/src/class-fields/init-err-contains-super.case
new file mode 100644
index 0000000000..49aa3c9bff
--- /dev/null
+++ b/src/class-fields/init-err-contains-super.case
@@ -0,0 +1,21 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: Syntax error if `super()` used in class field
+info: |
+  Static Semantics: Early Errors
+
+    FieldDefinition:
+      PropertyNameInitializeropt
+
+    - It is a Syntax Error if Initializer is present and Initializer Contains SuperCall is true.
+features: [class-fields]
+negative:
+  type: SyntaxError
+  phase: early
+template: initializer-error
+---*/
+
+//- initializer
+super()
diff --git a/src/class-fields/initializer-error/cls-decl-fields-arrow-fnc.template b/src/class-fields/initializer-error/cls-decl-fields-arrow-fnc.template
new file mode 100644
index 0000000000..308297a34a
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-arrow-fnc.template
@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-arrow-fnc-
+name: arrow function expression
+features: [arrow-function]
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  x = () => /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-comp-name.template b/src/class-fields/initializer-error/cls-decl-fields-comp-name.template
new file mode 100644
index 0000000000..a922c25b80
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-comp-name.template
@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-comp-name-
+name: computed ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var x = "string";
+class C {
+  static [x] = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-equality.template b/src/class-fields/initializer-error/cls-decl-fields-equality.template
new file mode 100644
index 0000000000..0e5b643e11
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-equality.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-equality-
+name: equality expression
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  x = {} == /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-literal-name.template b/src/class-fields/initializer-error/cls-decl-fields-literal-name.template
new file mode 100644
index 0000000000..62060229fa
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-literal-name-
+name: literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  x = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-static-comp-name.template b/src/class-fields/initializer-error/cls-decl-fields-static-comp-name.template
new file mode 100644
index 0000000000..b4eb238479
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-static-comp-name.template
@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-static-comp-name-
+name: static computed ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var x = "string";
+class C {
+  static [x] = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-static-literal-name.template b/src/class-fields/initializer-error/cls-decl-fields-static-literal-name.template
new file mode 100644
index 0000000000..335d76793f
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-static-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-static-literal-
+name: static literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  static x = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-static-string-literal-name.template b/src/class-fields/initializer-error/cls-decl-fields-static-string-literal-name.template
new file mode 100644
index 0000000000..5fd801e187
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-static-string-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-static-string-literal-name-
+name: static string literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  static 'x' = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-string-literal-name.template b/src/class-fields/initializer-error/cls-decl-fields-string-literal-name.template
new file mode 100644
index 0000000000..b76e487109
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-string-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-string-literal-name-
+name: string literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  'x' = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-ternary.template b/src/class-fields/initializer-error/cls-decl-fields-ternary.template
new file mode 100644
index 0000000000..db729e59c8
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-ternary.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-ternary-
+name: ternary expression
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  x = false ? {} : /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-decl-fields-typeof.template b/src/class-fields/initializer-error/cls-decl-fields-typeof.template
new file mode 100644
index 0000000000..86f5598b3b
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-decl-fields-typeof.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/statements/class/fields-typeof-
+name: typeof expression
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+class C {
+  x = typeof /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-arrow-fnc.template b/src/class-fields/initializer-error/cls-expr-fields-arrow-fnc.template
new file mode 100644
index 0000000000..0f20b4d9f8
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-arrow-fnc.template
@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-arrow-fnc-
+name: arrow function expression
+features: [arrow-function]
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  x = () => /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-comp-name.template b/src/class-fields/initializer-error/cls-expr-fields-comp-name.template
new file mode 100644
index 0000000000..fea438412f
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-comp-name.template
@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-comp-name-
+name: computed ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var x = "string";
+var C = class {
+  [x] = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-equality.template b/src/class-fields/initializer-error/cls-expr-fields-equality.template
new file mode 100644
index 0000000000..2946f8004d
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-equality.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-equality-
+name: equality expression
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  x = {} == /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-literal-name.template b/src/class-fields/initializer-error/cls-expr-fields-literal-name.template
new file mode 100644
index 0000000000..891e285274
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-literal-name-
+name: literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  x = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-static-comp-name.template b/src/class-fields/initializer-error/cls-expr-fields-static-comp-name.template
new file mode 100644
index 0000000000..cb44207f4e
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-static-comp-name.template
@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-static-comp-name-
+name: static computed ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var x = "string";
+var C = class {
+  static [x] = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-static-literal-name.template b/src/class-fields/initializer-error/cls-expr-fields-static-literal-name.template
new file mode 100644
index 0000000000..0a840e01ef
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-static-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-static-literal-
+name: static literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  static x = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-static-string-literal-name.template b/src/class-fields/initializer-error/cls-expr-fields-static-string-literal-name.template
new file mode 100644
index 0000000000..deed9b15e3
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-static-string-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-static-string-literal-name-
+name: static string literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  static 'x' = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-string-literal-name.template b/src/class-fields/initializer-error/cls-expr-fields-string-literal-name.template
new file mode 100644
index 0000000000..1325036c0c
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-string-literal-name.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-string-literal-name-
+name: string literal ClassElementName
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  'x' = /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-ternary.template b/src/class-fields/initializer-error/cls-expr-fields-ternary.template
new file mode 100644
index 0000000000..8dd67bed29
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-ternary.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-ternary-
+name: ternary expression
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  x = true ? {} : /*{ initializer }*/;
+}
diff --git a/src/class-fields/initializer-error/cls-expr-fields-typeof.template b/src/class-fields/initializer-error/cls-expr-fields-typeof.template
new file mode 100644
index 0000000000..ec75561623
--- /dev/null
+++ b/src/class-fields/initializer-error/cls-expr-fields-typeof.template
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+path: language/expressions/class/fields-typeof-
+name: typeof expression
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var C = class {
+  x = typeof /*{ initializer }*/;
+}