diff --git a/features.txt b/features.txt
index a3746dd5b5..1551ee5d69 100644
--- a/features.txt
+++ b/features.txt
@@ -188,6 +188,10 @@ Array.prototype.item
 String.prototype.item
 TypedArray.prototype.item
 
+# Arbitrary module namespace names
+# https://github.com/tc39/ecma262/pull/2154
+arbitrary-module-namespace-names
+
 ## Standard language features
 #
 # Language features that have been included in a published version of the
diff --git a/test/language/module-code/early-export-ill-formed-string.js b/test/language/module-code/early-export-ill-formed-string.js
index 904e0a93ac..a67bc3a25b 100644
--- a/test/language/module-code/early-export-ill-formed-string.js
+++ b/test/language/module-code/early-export-ill-formed-string.js
@@ -12,6 +12,7 @@ negative:
   flags: module
   phase: parse
   type: SyntaxError
+features: [arbitrary-module-namespace-names]
 ---*/
 
 $DONOTEVALUATE();
diff --git a/test/language/module-code/export-expname-binding-string.js b/test/language/module-code/export-expname-binding-string.js
index b424793f75..74a35caa02 100644
--- a/test/language/module-code/export-expname-binding-string.js
+++ b/test/language/module-code/export-expname-binding-string.js
@@ -10,6 +10,7 @@ info: |
   ModuleExportName : StringLiteral
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import * as Scouts from "./export-expname_FIXTURE.js";
 
diff --git a/test/language/module-code/export-expname-from-binding-string.js b/test/language/module-code/export-expname-from-binding-string.js
index 207eb9bb30..4de4268d4b 100644
--- a/test/language/module-code/export-expname-from-binding-string.js
+++ b/test/language/module-code/export-expname-from-binding-string.js
@@ -14,6 +14,7 @@ info: |
   ModuleExportName : StringLiteral
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import * as Scouts from "./export-expname-from-binding-string.js";
 export { Mercury as "☿" } from "./export-expname_FIXTURE.js";
diff --git a/test/language/module-code/export-expname-from-star-string.js b/test/language/module-code/export-expname-from-star-string.js
index c75c155293..75c45a0ffc 100644
--- a/test/language/module-code/export-expname-from-star-string.js
+++ b/test/language/module-code/export-expname-from-star-string.js
@@ -11,6 +11,7 @@ info: |
   ModuleExportName : StringLiteral
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import * as Scouts from "./export-expname-from-star-string.js";
 export * as "All" from "./export-expname_FIXTURE.js";
diff --git a/test/language/module-code/export-expname-from-star.js b/test/language/module-code/export-expname-from-star.js
index e490d7d1fe..17be9b973f 100644
--- a/test/language/module-code/export-expname-from-star.js
+++ b/test/language/module-code/export-expname-from-star.js
@@ -9,6 +9,7 @@ info: |
     `*`
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import * as Scouts from "./export-expname-from-star.js";
 export * from "./export-expname_FIXTURE.js";
diff --git a/test/language/module-code/export-expname-from-string-binding.js b/test/language/module-code/export-expname-from-string-binding.js
index 514920b2c8..955e857d07 100644
--- a/test/language/module-code/export-expname-from-string-binding.js
+++ b/test/language/module-code/export-expname-from-string-binding.js
@@ -12,6 +12,7 @@ info: |
     [+From] ModuleExportName as IdentifierName
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import * as Scouts from "./export-expname-from-string-binding.js";
 export { "☿" as Ami } from "./export-expname_FIXTURE.js";
diff --git a/test/language/module-code/export-expname-from-string-string.js b/test/language/module-code/export-expname-from-string-string.js
index efca8c9363..2e3fd6955f 100644
--- a/test/language/module-code/export-expname-from-string-string.js
+++ b/test/language/module-code/export-expname-from-string-string.js
@@ -12,6 +12,7 @@ info: |
     [+From] ModuleExportName as ModuleExportName
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import * as Scouts from "./export-expname-from-string-string.js";
 export { "☿" as "Ami" } from "./export-expname_FIXTURE.js";
diff --git a/test/language/module-code/export-expname-from-string.js b/test/language/module-code/export-expname-from-string.js
index bc0ab0ea05..17fa7a33dd 100644
--- a/test/language/module-code/export-expname-from-string.js
+++ b/test/language/module-code/export-expname-from-string.js
@@ -14,6 +14,7 @@ info: |
   ModuleExportName : StringLiteral
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import * as Scouts from "./export-expname-from-string.js";
 export { "☿" } from "./export-expname_FIXTURE.js";
diff --git a/test/language/module-code/export-expname-import-string-binding.js b/test/language/module-code/export-expname-import-string-binding.js
index 3210b3b7af..bc34c71c93 100644
--- a/test/language/module-code/export-expname-import-string-binding.js
+++ b/test/language/module-code/export-expname-import-string-binding.js
@@ -10,6 +10,7 @@ info: |
     ModuleExportName `as` IdentifierName
 
 flags: [module]
+features: [arbitrary-module-namespace-names]
 ---*/
 import { "☿" as Ami } from "./export-expname_FIXTURE.js";