diff --git a/test/language/module-code/export-default-asyncfunction-declaration-binding-exists.js b/test/language/module-code/export-default-asyncfunction-declaration-binding-exists.js
new file mode 100644
index 00000000000..ea726a58414
--- /dev/null
+++ b/test/language/module-code/export-default-asyncfunction-declaration-binding-exists.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : AsyncFunctionDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    AsyncFunctionDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+class A {};
+export default async function A() {}
diff --git a/test/language/module-code/export-default-asyncfunction-declaration-binding.js b/test/language/module-code/export-default-asyncfunction-declaration-binding.js
new file mode 100644
index 00000000000..dbf266a2ce1
--- /dev/null
+++ b/test/language/module-code/export-default-asyncfunction-declaration-binding.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : AsyncFunctionDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    AsyncFunctionDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+---*/
+
+export default async function A() {}
+A.foo = '';
diff --git a/test/language/module-code/export-default-asyncgenerator-declaration-binding-exists.js b/test/language/module-code/export-default-asyncgenerator-declaration-binding-exists.js
new file mode 100644
index 00000000000..9a0d71b6bd7
--- /dev/null
+++ b/test/language/module-code/export-default-asyncgenerator-declaration-binding-exists.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : AsyncGeneratorDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    AsyncGeneratorDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+class AG {}
+export default async function * AG() {}
diff --git a/test/language/module-code/export-default-asyncgenerator-declaration-binding.js b/test/language/module-code/export-default-asyncgenerator-declaration-binding.js
new file mode 100644
index 00000000000..d0b31d4f391
--- /dev/null
+++ b/test/language/module-code/export-default-asyncgenerator-declaration-binding.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : AsyncGeneratorDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    AsyncGeneratorDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+---*/
+
+export default async function * AG() {}
+AG.foo = '';
diff --git a/test/language/module-code/export-default-function-declaration-binding-exists.js b/test/language/module-code/export-default-function-declaration-binding-exists.js
new file mode 100644
index 00000000000..cc97904bc89
--- /dev/null
+++ b/test/language/module-code/export-default-function-declaration-binding-exists.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : FunctionDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    FunctionDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+class F {}
+export default function F() {}
+
diff --git a/test/language/module-code/export-default-function-declaration-binding.js b/test/language/module-code/export-default-function-declaration-binding.js
new file mode 100644
index 00000000000..a5bce67dd50
--- /dev/null
+++ b/test/language/module-code/export-default-function-declaration-binding.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : FunctionDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    FunctionDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+---*/
+
+export default function F() {}
+F.foo = '';
diff --git a/test/language/module-code/export-default-generator-declaration-binding-exists.js b/test/language/module-code/export-default-generator-declaration-binding-exists.js
new file mode 100644
index 00000000000..5c21bd73b24
--- /dev/null
+++ b/test/language/module-code/export-default-generator-declaration-binding-exists.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : GeneratorDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    GeneratorDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+class G {}
+export default function * G() {}
diff --git a/test/language/module-code/export-default-generator-declaration-binding.js b/test/language/module-code/export-default-generator-declaration-binding.js
new file mode 100644
index 00000000000..37fbffa2329
--- /dev/null
+++ b/test/language/module-code/export-default-generator-declaration-binding.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  ExportDeclaration : HoistableDeclaration : GeneratorDeclaration
+  esid: prod-HoistableDeclaration
+info: |
+  ExportDeclaration :
+    HoistableDeclaration[Yield, Await, Default]:
+
+  HoistableDeclaration[Yield, Await, Default]:
+    GeneratorDeclaration[?Yield, ?Await, ?Default]
+
+flags: [module]
+---*/
+
+export default function * G() {}
+G.foo = '';