diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-expr.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-expr.js
index 966ab94369..b34f708fef 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-expr.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-expr.js
@@ -8,7 +8,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions, async-functions]
+features: [dynamic-import, import-attributes, async-functions]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-ident.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-ident.js
index d13ca53b20..fa90559510 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-ident.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-await-ident.js
@@ -8,7 +8,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions, async-functions]
+features: [dynamic-import, import-attributes, async-functions]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-return.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-return.js
index 6da4a5482b..5c68a62c5b 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-return.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-return.js
@@ -12,7 +12,7 @@ info: |
        a. Let optionsRef be the result of evaluating optionsExpression.
        b. Let options be ? GetValue(optionsRef).
     [...]
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 ---*/
 
 var beforeCount = 0;
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-throw.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-throw.js
index e5e6619096..8158062431 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-throw.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-abrupt-throw.js
@@ -12,7 +12,7 @@ info: |
        a. Let optionsRef be the result of evaluating optionsExpression.
        b. Let options be ? GetValue(optionsRef).
     [...]
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 ---*/
 
 var beforeCount = 0;
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-sequence.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-sequence.js
index 9795c4bada..faabee3dd3 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-sequence.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-evaluation-sequence.js
@@ -12,7 +12,7 @@ info: |
        a. Let optionsRef be the result of evaluating optionsExpression.
        b. Let options be ? GetValue(optionsRef).
     [...]
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 ---*/
 
 var log = [];
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-get-with-error.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-get-with-error.js
index d7bb7d8c04..dc5ca30a09 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-get-with-error.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-get-with-error.js
@@ -16,13 +16,13 @@ info: |
         b. Let assertionsObj be Get(options, "assert").
         c. IfAbruptRejectPromise(assertionsObj, promiseCapability).
     [...]
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
 var thrown = new Test262Error();
 var options = {
-  get assert() {
+  get with() {
     throw thrown;
   }
 };
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-in.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-in.js
index 6d8ac2b0eb..4c95100d5f 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-in.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-in.js
@@ -7,7 +7,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-non-object.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-non-object.js
index 28b6e573d1..7662f5207f 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-non-object.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-non-object.js
@@ -16,7 +16,7 @@ info: |
            i. Perform ! Call(promiseCapability.[[Reject]], undefined, « a newly created TypeError object »).
            ii. Return promiseCapability.[[Promise]].
     [...]
-features: [dynamic-import, import-assertions, Symbol, BigInt]
+features: [dynamic-import, import-attributes, Symbol, BigInt]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-fulfill.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-fulfill.js
index c806f3e683..00970398da 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-fulfill.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-fulfill.js
@@ -9,7 +9,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-reject.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-reject.js
index 3970c745b6..83fef2d95d 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-reject.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-trailing-comma-reject.js
@@ -9,7 +9,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-abrupt.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-abrupt.js
index 282c7613aa..af1466a7ba 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-abrupt.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-abrupt.js
@@ -21,13 +21,13 @@ info: |
            ii. Let keys be EnumerableOwnPropertyNames(assertionsObj, key).
            iii. IfAbruptRejectPromise(keys, promiseCapability).
     [...]
-features: [dynamic-import, import-assertions, Proxy]
+features: [dynamic-import, import-attributes, Proxy]
 flags: [async]
 ---*/
 
 var thrown = new Test262Error();
 var options = {
-  assert: new Proxy({}, {
+  with: new Proxy({}, {
     ownKeys: function() {
       throw thrown;
     },
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-enumerable.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-enumerable.js
index 341eb4d1d8..fda9375a0f 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-enumerable.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration-enumerable.js
@@ -22,7 +22,7 @@ info: |
               [...]
            ii. Let keys be EnumerableOwnPropertyNames(assertionsObj, key).
     [...]
-features: [dynamic-import, import-assertions, json-modules, Symbol, Proxy]
+features: [dynamic-import, import-attributes, json-modules, Symbol, Proxy]
 flags: [async]
 ---*/
 
@@ -36,7 +36,7 @@ var descriptors = {
 var log = [];
 
 var options = {
-  assert: new Proxy({}, {
+  with: new Proxy({}, {
     ownKeys: function() {
       return ["type"];
     },
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration.js
index cfa9d28a8f..a7e21401b2 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-enumeration.js
@@ -22,7 +22,7 @@ info: |
               [...]
            ii. Let keys be EnumerableOwnPropertyNames(assertionsObj, key).
     [...]
-features: [dynamic-import, import-assertions, Symbol, Proxy]
+features: [dynamic-import, import-attributes, Symbol, Proxy]
 flags: [async]
 ---*/
 
@@ -38,7 +38,7 @@ var descriptors = {
 };
 
 var options = {
-  assert: new Proxy({}, {
+  with: new Proxy({}, {
     ownKeys: function() {
       return [symbol, 'nonEnumerable', 'absent'];
     },
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-non-object.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-non-object.js
index d685ee83d3..710890b14d 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-non-object.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-non-object.js
@@ -23,7 +23,7 @@ info: |
                  newly created TypeError object »).
               2. Return promiseCapability.[[Promise]].
     [...]
-features: [dynamic-import, import-assertions, Symbol, BigInt]
+features: [dynamic-import, import-attributes, Symbol, BigInt]
 flags: [async]
 ---*/
 
@@ -36,12 +36,12 @@ function test(promise, valueType) {
 }
 
 Promise.all([
-    test(import('./2nd-param_FIXTURE.js', {assert:null}), 'null'),
-    test(import('./2nd-param_FIXTURE.js', {assert:false}), 'boolean'),
-    test(import('./2nd-param_FIXTURE.js', {assert:23}), 'number'),
-    test(import('./2nd-param_FIXTURE.js', {assert:''}), 'string'),
-    test(import('./2nd-param_FIXTURE.js', {assert:Symbol('')}), 'symbol'),
-    test(import('./2nd-param_FIXTURE.js', {assert:23n}), 'bigint')
+    test(import('./2nd-param_FIXTURE.js', {with:null}), 'null'),
+    test(import('./2nd-param_FIXTURE.js', {with:false}), 'boolean'),
+    test(import('./2nd-param_FIXTURE.js', {with:23}), 'number'),
+    test(import('./2nd-param_FIXTURE.js', {with:''}), 'string'),
+    test(import('./2nd-param_FIXTURE.js', {with:Symbol('')}), 'symbol'),
+    test(import('./2nd-param_FIXTURE.js', {with:23n}), 'bigint')
   ])
   .then(function() {})
   .then($DONE, $DONE);
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-undefined.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-undefined.js
index bdd4003d38..5565a2ffd4 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-undefined.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-undefined.js
@@ -21,13 +21,13 @@ info: |
                  newly created TypeError object »).
               2. Return promiseCapability.[[Promise]].
     [...]
-features: [dynamic-import, import-assertions, Symbol, BigInt]
+features: [dynamic-import, import-attributes, Symbol, BigInt]
 flags: [async]
 ---*/
 
 Promise.all([
     import('./2nd-param_FIXTURE.js', {}),
-    import('./2nd-param_FIXTURE.js', {assert:undefined}),
+    import('./2nd-param_FIXTURE.js', {with:undefined}),
   ])
   .then(function(values) {
     assert.sameValue(values[0].default, 262);
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-abrupt.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-abrupt.js
index e840a71950..1887326ebd 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-abrupt.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-abrupt.js
@@ -19,13 +19,13 @@ info: |
               1. Let value be Get(assertionsObj, key).
               2. IfAbruptRejectPromise(value, promiseCapability).
     [...]
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
 var thrown = new Test262Error();
 
-import('./2nd-param_FIXTURE.js', {assert:{get ''() { throw thrown; }}})
+import('./2nd-param_FIXTURE.js', {with:{get ''() { throw thrown; }}})
   .then(function() {
     throw new Test262Error('Expected promise to be rejected, but it was fulfilled');
   }, function(error) {
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-non-string.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-non-string.js
index aa71b1c282..11bb880eff 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-non-string.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-with-value-non-string.js
@@ -22,7 +22,7 @@ info: |
                     newly created TypeError object »).
                  b. Return promiseCapability.[[Promise]].
     [...]
-features: [dynamic-import, import-assertions, Symbol, BigInt]
+features: [dynamic-import, import-attributes, Symbol, BigInt]
 flags: [async]
 ---*/
 
@@ -35,13 +35,13 @@ function test(promise, valueType) {
 }
 
 Promise.all([
-    test(import('./2nd-param_FIXTURE.js', {assert:{'': undefined}}), 'undefined'),
-    test(import('./2nd-param_FIXTURE.js', {assert:{'': null}}), 'null'),
-    test(import('./2nd-param_FIXTURE.js', {assert:{'': false}}), 'boolean'),
-    test(import('./2nd-param_FIXTURE.js', {assert:{'': 23}}), 'number'),
-    test(import('./2nd-param_FIXTURE.js', {assert:{'': Symbol('')}}), 'symbol'),
-    test(import('./2nd-param_FIXTURE.js', {assert:{'': 23n}}), 'bigint'),
-    test(import('./2nd-param_FIXTURE.js', {assert:{'': {}}}), 'object')
+    test(import('./2nd-param_FIXTURE.js', {with:{'': undefined}}), 'undefined'),
+    test(import('./2nd-param_FIXTURE.js', {with:{'': null}}), 'null'),
+    test(import('./2nd-param_FIXTURE.js', {with:{'': false}}), 'boolean'),
+    test(import('./2nd-param_FIXTURE.js', {with:{'': 23}}), 'number'),
+    test(import('./2nd-param_FIXTURE.js', {with:{'': Symbol('')}}), 'symbol'),
+    test(import('./2nd-param_FIXTURE.js', {with:{'': 23n}}), 'bigint'),
+    test(import('./2nd-param_FIXTURE.js', {with:{'': {}}}), 'object')
   ])
   .then(function() {})
   .then($DONE, $DONE);
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-expr.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-expr.js
index b1482ac9e8..dc001512d4 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-expr.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-expr.js
@@ -8,7 +8,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-invalid.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-invalid.js
index 56971e8031..304562c714 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-invalid.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-invalid.js
@@ -8,7 +8,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [onlyStrict]
 negative:
   phase: parse
diff --git a/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-valid.js b/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-valid.js
index 39a8fe7d6e..19224503a3 100644
--- a/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-valid.js
+++ b/test/language/expressions/dynamic-import/import-attributes/2nd-param-yield-ident-valid.js
@@ -8,7 +8,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async, noStrict]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/trailing-comma-fulfill.js b/test/language/expressions/dynamic-import/import-attributes/trailing-comma-fulfill.js
index 0d3689b37e..8b8b0a04a6 100644
--- a/test/language/expressions/dynamic-import/import-attributes/trailing-comma-fulfill.js
+++ b/test/language/expressions/dynamic-import/import-attributes/trailing-comma-fulfill.js
@@ -9,7 +9,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
diff --git a/test/language/expressions/dynamic-import/import-attributes/trailing-comma-reject.js b/test/language/expressions/dynamic-import/import-attributes/trailing-comma-reject.js
index d257eccc32..053b489c5b 100644
--- a/test/language/expressions/dynamic-import/import-attributes/trailing-comma-reject.js
+++ b/test/language/expressions/dynamic-import/import-attributes/trailing-comma-reject.js
@@ -9,7 +9,7 @@ info: |
   ImportCall[Yield, Await]:
     import ( AssignmentExpression[+In, ?Yield, ?Await] ,opt )
     import ( AssignmentExpression[+In, ?Yield, ?Await] , AssignmentExpression[+In, ?Yield, ?Await] ,opt )
-features: [dynamic-import, import-assertions]
+features: [dynamic-import, import-attributes]
 flags: [async]
 ---*/
 
diff --git a/test/language/import/import-attributes/json-extensibility-array.js b/test/language/import/import-attributes/json-extensibility-array.js
index 4dc80018b9..8fb21c6bd6 100644
--- a/test/language/import/import-attributes/json-extensibility-array.js
+++ b/test/language/import/import-attributes/json-extensibility-array.js
@@ -5,10 +5,10 @@ esid: sec-parse-json-module
 description: Creates extensible arrays
 flags: [module]
 includes: [propertyHelper.js]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-array_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-array_FIXTURE.json' with { type: 'json' };
 
 value.test262property = 'test262 value';
 
diff --git a/test/language/import/import-attributes/json-extensibility-object.js b/test/language/import/import-attributes/json-extensibility-object.js
index fb4c8ed2c4..3cdeb79bf6 100644
--- a/test/language/import/import-attributes/json-extensibility-object.js
+++ b/test/language/import/import-attributes/json-extensibility-object.js
@@ -5,10 +5,10 @@ esid: sec-parse-json-module
 description: Creates extensible objects
 flags: [module]
 includes: [propertyHelper.js]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-object_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-object_FIXTURE.json' with { type: 'json' };
 
 value.test262property = 'test262 value';
 
diff --git a/test/language/import/import-attributes/json-idempotency-indirect_FIXTURE.js b/test/language/import/import-attributes/json-idempotency-indirect_FIXTURE.js
index 61c440b333..15f28b68b7 100644
--- a/test/language/import/import-attributes/json-idempotency-indirect_FIXTURE.js
+++ b/test/language/import/import-attributes/json-idempotency-indirect_FIXTURE.js
@@ -1,6 +1,6 @@
 // Copyright (C) 2021 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
-import value from './json-idempotency_FIXTURE.json' assert { type: 'json' };
+import value from './json-idempotency_FIXTURE.json' with { type: 'json' };
 
 globalThis.viaSecondModule = value;
diff --git a/test/language/import/import-attributes/json-idempotency.js b/test/language/import/import-attributes/json-idempotency.js
index 54832a1cad..e2c1b8e9d9 100644
--- a/test/language/import/import-attributes/json-idempotency.js
+++ b/test/language/import/import-attributes/json-idempotency.js
@@ -4,17 +4,17 @@
 esid: sec-parse-json-module
 description: The same object representation is returned to all import sites
 flags: [module, async]
-features: [import-assertions, json-modules, globalThis, dynamic-import]
+features: [import-attributes, json-modules, globalThis, dynamic-import]
 ---*/
 
-import viaStaticImport1 from './json-idempotency_FIXTURE.json' assert { type: 'json' };
-import {default as viaStaticImport2} from './json-idempotency_FIXTURE.json' assert { type: 'json' };
+import viaStaticImport1 from './json-idempotency_FIXTURE.json' with { type: 'json' };
+import {default as viaStaticImport2} from './json-idempotency_FIXTURE.json' with { type: 'json' };
 import './json-idempotency-indirect_FIXTURE.js';
 
 assert.sameValue(viaStaticImport1, viaStaticImport2);
 assert.sameValue(globalThis.viaSecondModule, viaStaticImport1);
 
-import('./json-idempotency_FIXTURE.json', { assert: { type: 'json' } })
+import('./json-idempotency_FIXTURE.json', { with: { type: 'json' } })
   .then(function(viaDynamicImport) {
     assert.sameValue(viaDynamicImport.default, viaStaticImport1);
   })
diff --git a/test/language/import/import-attributes/json-invalid.js b/test/language/import/import-attributes/json-invalid.js
index 855d8566f7..490083940f 100644
--- a/test/language/import/import-attributes/json-invalid.js
+++ b/test/language/import/import-attributes/json-invalid.js
@@ -12,7 +12,7 @@ info: |
   1. Let json be ? Call(%JSON.parse%, undefined, « source »).
   2. Return CreateDefaultExportSyntheticModule(json).
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 negative:
   phase: parse
   type: SyntaxError
@@ -20,4 +20,4 @@ negative:
 
 $DONOTEVALUATE();
 
-import value from './json-invalid_FIXTURE.json' assert { type: 'json' };
+import value from './json-invalid_FIXTURE.json' with { type: 'json' };
diff --git a/test/language/import/import-attributes/json-named-bindings.js b/test/language/import/import-attributes/json-named-bindings.js
index 7900fe38f8..01873fe99e 100644
--- a/test/language/import/import-attributes/json-named-bindings.js
+++ b/test/language/import/import-attributes/json-named-bindings.js
@@ -9,7 +9,7 @@ info: |
   This was ultimately rejected, so attempting to import in this way should
   produce a SyntaxError.
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 negative:
   phase: parse
   type: SyntaxError
@@ -17,4 +17,4 @@ negative:
 
 $DONOTEVALUATE();
 
-import {name} from './json-named-bindings_FIXTURE.json' assert { type: 'json' };
+import {name} from './json-named-bindings_FIXTURE.json' with { type: 'json' };
diff --git a/test/language/import/import-attributes/json-value-array.js b/test/language/import/import-attributes/json-value-array.js
index 90d64b96d9..e819357e66 100644
--- a/test/language/import/import-attributes/json-value-array.js
+++ b/test/language/import/import-attributes/json-value-array.js
@@ -16,10 +16,10 @@ info: |
   module record includes non-printable characters (specifically, all four forms
   of JSON's so-called "whitespace" token) both before and after the "value."
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-array_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-array_FIXTURE.json' with { type: 'json' };
 
 assert(Array.isArray(value), 'the exported value is an array');
 assert.sameValue(
diff --git a/test/language/import/import-attributes/json-value-boolean.js b/test/language/import/import-attributes/json-value-boolean.js
index 0ab3fd371e..82433ef8df 100644
--- a/test/language/import/import-attributes/json-value-boolean.js
+++ b/test/language/import/import-attributes/json-value-boolean.js
@@ -12,9 +12,9 @@ info: |
   1. Let json be ? Call(%JSON.parse%, undefined, « source »).
   2. Return CreateDefaultExportSyntheticModule(json).
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-boolean_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-boolean_FIXTURE.json' with { type: 'json' };
 
 assert.sameValue(value, true);
diff --git a/test/language/import/import-attributes/json-value-null.js b/test/language/import/import-attributes/json-value-null.js
index cb651b33b0..cbc8e435e7 100644
--- a/test/language/import/import-attributes/json-value-null.js
+++ b/test/language/import/import-attributes/json-value-null.js
@@ -12,9 +12,9 @@ info: |
   1. Let json be ? Call(%JSON.parse%, undefined, « source »).
   2. Return CreateDefaultExportSyntheticModule(json).
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-null_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-null_FIXTURE.json' with { type: 'json' };
 
 assert.sameValue(value, null);
diff --git a/test/language/import/import-attributes/json-value-number.js b/test/language/import/import-attributes/json-value-number.js
index da4cada9d2..0c5a9f322f 100644
--- a/test/language/import/import-attributes/json-value-number.js
+++ b/test/language/import/import-attributes/json-value-number.js
@@ -12,9 +12,9 @@ info: |
   1. Let json be ? Call(%JSON.parse%, undefined, « source »).
   2. Return CreateDefaultExportSyntheticModule(json).
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-number_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-number_FIXTURE.json' with { type: 'json' };
 
 assert.sameValue(value, -1.2345);
diff --git a/test/language/import/import-attributes/json-value-object.js b/test/language/import/import-attributes/json-value-object.js
index 815ab9f896..b8d7a9f0aa 100644
--- a/test/language/import/import-attributes/json-value-object.js
+++ b/test/language/import/import-attributes/json-value-object.js
@@ -17,10 +17,10 @@ info: |
   of JSON's so-called "whitespace" token) both before and after the "value."
 flags: [module]
 includes: [propertyHelper.js]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-object_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-object_FIXTURE.json' with { type: 'json' };
 
 assert.sameValue(Object.getPrototypeOf(value), Object.prototype);
 assert.sameValue(Object.getOwnPropertyNames(value).length, 6);
diff --git a/test/language/import/import-attributes/json-value-string.js b/test/language/import/import-attributes/json-value-string.js
index ce0ebcf323..5e5ce171a8 100644
--- a/test/language/import/import-attributes/json-value-string.js
+++ b/test/language/import/import-attributes/json-value-string.js
@@ -12,9 +12,9 @@ info: |
   1. Let json be ? Call(%JSON.parse%, undefined, « source »).
   2. Return CreateDefaultExportSyntheticModule(json).
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import value from './json-value-string_FIXTURE.json' assert { type: 'json' };
+import value from './json-value-string_FIXTURE.json' with { type: 'json' };
 
 assert.sameValue(value, 'a string value');
diff --git a/test/language/import/import-attributes/json-via-namespace.js b/test/language/import/import-attributes/json-via-namespace.js
index f0eedb379b..0ce54422d2 100644
--- a/test/language/import/import-attributes/json-via-namespace.js
+++ b/test/language/import/import-attributes/json-via-namespace.js
@@ -4,10 +4,10 @@
 esid: sec-parse-json-module
 description: May be imported via a module namespace object
 flags: [module]
-features: [import-assertions, json-modules]
+features: [import-attributes, json-modules]
 ---*/
 
-import * as ns from './json-via-namespace_FIXTURE.json' assert { type: 'json' };
+import * as ns from './json-via-namespace_FIXTURE.json' with { type: 'json' };
 
 assert.sameValue(Object.getOwnPropertyNames(ns).length, 1);
 assert.sameValue(ns.default, 262);
diff --git a/test/language/module-code/import-attributes/allow-nlt-before-with.js b/test/language/module-code/import-attributes/allow-nlt-before-with.js
new file mode 100644
index 0000000000..4bfe15e17c
--- /dev/null
+++ b/test/language/module-code/import-attributes/allow-nlt-before-with.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: >
+  `with` AttributesKeyword in WithClause in ImportDeclaration can
+  be preceded by a line terminator
+esid: sec-modules
+info: |
+  ImportDeclaration:
+    import ModuleSpecifier[no LineTerminator here] WithClause;
+
+  WithClause:
+    AttributesKeyword {}
+    AttributesKeyword { WithEntries ,opt }
+
+  AttributesKeyword:
+    with
+    [no LineTerminator here] assert
+
+negative:
+  phase: resolution
+  type: SyntaxError
+features: [import-attributes, globalThis]
+flags: [module, raw]
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+import "./ensure-linking-error_FIXTURE.js";
+
+import * as x from './import-attribute-1_FIXTURE.js'
+with
+{ type: 'foo' };
diff --git a/test/language/module-code/import-attributes/early-dup-attribute-key-export.js b/test/language/module-code/import-attributes/early-dup-attribute-key-export.js
index 9f44e359a0..27022fcf60 100644
--- a/test/language/module-code/import-attributes/early-dup-attribute-key-export.js
+++ b/test/language/module-code/import-attributes/early-dup-attribute-key-export.js
@@ -8,7 +8,7 @@ info: |
 
   - It is a Syntax Error if WithClauseToAttributes of WithClause has two
     entries a and b such that a.[[Key]] is b.[[Key]].
-features: [import-assertions]
+features: [import-attributes]
 flags: [module]
 negative:
   phase: parse
@@ -17,7 +17,7 @@ negative:
 
 $DONOTEVALUATE();
 
-export * from './import-assertion-3_FIXTURE.js' assert {
+export * from './import-attribute-3_FIXTURE.js' with {
   type: 'json',
   'typ\u0065': ''
 };
diff --git a/test/language/module-code/import-attributes/early-dup-attribute-key-import-nobinding.js b/test/language/module-code/import-attributes/early-dup-attribute-key-import-nobinding.js
index 7c48699630..08492373a6 100644
--- a/test/language/module-code/import-attributes/early-dup-attribute-key-import-nobinding.js
+++ b/test/language/module-code/import-attributes/early-dup-attribute-key-import-nobinding.js
@@ -9,7 +9,7 @@ info: |
 
   - It is a Syntax Error if WithClauseToAttributes of WithClause has two
     entries a and b such that a.[[Key]] is b.[[Key]].
-features: [import-assertions]
+features: [import-attributes]
 flags: [module]
 negative:
   phase: parse
@@ -18,7 +18,7 @@ negative:
 
 $DONOTEVALUATE();
 
-import './import-assertion-2_FIXTURE.js' assert {
+import './import-attribute-2_FIXTURE.js' with {
   type: 'json',
   'typ\u0065': ''
 };
diff --git a/test/language/module-code/import-attributes/early-dup-attribute-key-import-withbinding.js b/test/language/module-code/import-attributes/early-dup-attribute-key-import-withbinding.js
index 0874455882..e6ef63f605 100644
--- a/test/language/module-code/import-attributes/early-dup-attribute-key-import-withbinding.js
+++ b/test/language/module-code/import-attributes/early-dup-attribute-key-import-withbinding.js
@@ -9,7 +9,7 @@ info: |
 
   - It is a Syntax Error if WithClauseToAttributes of WithClause has two
     entries a and b such that a.[[Key]] is b.[[Key]].
-features: [import-assertions]
+features: [import-attributes]
 flags: [module]
 negative:
   phase: parse
@@ -18,7 +18,7 @@ negative:
 
 $DONOTEVALUATE();
 
-import x from './import-assertion-1_FIXTURE.js' assert {
+import x from './import-attribute-1_FIXTURE.js' with {
   type: 'json',
   'typ\u0065': ''
 };
diff --git a/test/language/module-code/import-attributes/eval-gtbndng-indirect-faux-attribute.js b/test/language/module-code/import-attributes/eval-gtbndng-indirect-faux-attribute.js
deleted file mode 100644
index 46b6069510..0000000000
--- a/test/language/module-code/import-attributes/eval-gtbndng-indirect-faux-attribute.js
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright (C) 2021 the V8 project authors. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-/*---
-description: >
-  `assert` AttributesKeyword in WithClause in ImportDeclaration may not
-  be preceded by a line terminator
-esid: sec-modules
-info: |
-  ImportDeclaration:
-    import ModuleSpecifier[no LineTerminator here] WithClause;
-
-  WithClause:
-    AttributesKeyword {}
-    AttributesKeyword { WithEntries ,opt }
-
-  AttributesKeyword:
-    with
-    [no LineTerminator here] assert
-
-  The restriction LineTerminator could be verified more simply with a negative
-  syntax test. This test is designed to parse successfully in order to verify
-  the restriction more precisely.
-features: [import-assertions, globalThis]
-flags: [module, raw]
----*/
-
-var callCount = 0;
-
-// Define a property on the global "this" value so that the effect of the
-// expected IdentifierReference can be observed.
-Object.defineProperty(globalThis, 'assert', {
-  get: function() {
-    callCount += 1;
-  }
-});
-
-import * as x from './import-assertion-1_FIXTURE.js'
-assert
-{ type: 'json' };
-
-if (x.default !== 262.1) {
-  throw 'module value incorrectly imported - first declaration';
-}
-
-if (callCount !== 1) {
-  throw 'IdentifierReference not recognized - first declaration';
-}
diff --git a/test/language/module-code/import-attributes/import-attribute-empty.js b/test/language/module-code/import-attributes/import-attribute-empty.js
index 11ba46ac7c..6c556819ae 100644
--- a/test/language/module-code/import-attributes/import-attribute-empty.js
+++ b/test/language/module-code/import-attributes/import-attribute-empty.js
@@ -8,8 +8,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -18,12 +18,12 @@ info: |
   AttributeKey:
     IdentifierName
     StringLiteral
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 flags: [module]
 ---*/
 
-import x from './import-assertion-1_FIXTURE.js' assert {};
-import './import-assertion-2_FIXTURE.js' assert {};
-export * from './import-assertion-3_FIXTURE.js' assert {};
+import x from './import-attribute-1_FIXTURE.js' with {};
+import './import-attribute-2_FIXTURE.js' with {};
+export * from './import-attribute-3_FIXTURE.js' with {};
 
 assert.sameValue(x, 262.1);
diff --git a/test/language/module-code/import-attributes/import-attribute-key-identifiername.js b/test/language/module-code/import-attributes/import-attribute-key-identifiername.js
index 605b49f739..28d10211cf 100644
--- a/test/language/module-code/import-attributes/import-attribute-key-identifiername.js
+++ b/test/language/module-code/import-attributes/import-attribute-key-identifiername.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -22,7 +22,7 @@ info: |
 negative:
   phase: resolution
   type: SyntaxError
-features: [import-assertions]
+features: [import-attributes]
 flags: [module]
 ---*/
 
@@ -30,8 +30,8 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert {if:''};
-import './import-assertion-2_FIXTURE.js' assert {if:''};
-export * from './import-assertion-3_FIXTURE.js' assert {if:''};
+import x from './import-attribute-1_FIXTURE.js' with {if:''};
+import './import-attribute-2_FIXTURE.js' with {if:''};
+export * from './import-attribute-3_FIXTURE.js' with {if:''};
 
 assert.sameValue(x, 262.1);
diff --git a/test/language/module-code/import-attributes/import-attribute-key-string-double.js b/test/language/module-code/import-attributes/import-attribute-key-string-double.js
index 0a6491686a..6182740696 100644
--- a/test/language/module-code/import-attributes/import-attribute-key-string-double.js
+++ b/test/language/module-code/import-attributes/import-attribute-key-string-double.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -22,7 +22,7 @@ info: |
 negative:
   phase: resolution
   type: SyntaxError
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 flags: [module]
 ---*/
 
@@ -30,8 +30,8 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert {"test262\u0078":''};
-import './import-assertion-2_FIXTURE.js' assert {"test262\u0078":''};
-export * from './import-assertion-3_FIXTURE.js' assert {"test262\u0078":''};
+import x from './import-attribute-1_FIXTURE.js' with {"test262\u0078":''};
+import './import-attribute-2_FIXTURE.js' with {"test262\u0078":''};
+export * from './import-attribute-3_FIXTURE.js' with {"test262\u0078":''};
 
 assert.sameValue(x, 262.1);
diff --git a/test/language/module-code/import-attributes/import-attribute-key-string-single.js b/test/language/module-code/import-attributes/import-attribute-key-string-single.js
index edccfeb08e..1d5869d77f 100644
--- a/test/language/module-code/import-attributes/import-attribute-key-string-single.js
+++ b/test/language/module-code/import-attributes/import-attribute-key-string-single.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -22,7 +22,7 @@ info: |
 negative:
   phase: resolution
   type: SyntaxError
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 flags: [module]
 ---*/
 
@@ -30,8 +30,8 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert {'test262\u0078':''};
-import './import-assertion-2_FIXTURE.js' assert {'test262\u0078':''};
-export * from './import-assertion-3_FIXTURE.js' assert {'test262\u0078':''};
+import x from './import-attribute-1_FIXTURE.js' with {'test262\u0078':''};
+import './import-attribute-2_FIXTURE.js' with {'test262\u0078':''};
+export * from './import-attribute-3_FIXTURE.js' with {'test262\u0078':''};
 
 assert.sameValue(x, 262.1);
diff --git a/test/language/module-code/import-attributes/import-attribute-many.js b/test/language/module-code/import-attributes/import-attribute-many.js
index fccf8be5c2..cfd42baf08 100644
--- a/test/language/module-code/import-attributes/import-attribute-many.js
+++ b/test/language/module-code/import-attributes/import-attribute-many.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -22,7 +22,7 @@ info: |
 negative:
   phase: resolution
   type: SyntaxError
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 flags: [module]
 ---*/
 
@@ -30,6 +30,6 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert {test262_1:'',test262_2:'',test262_3:'',test262_4:''};
-import './import-assertion-2_FIXTURE.js' assert {test262_1:'',test262_2:'',test262_3:'',test262_4:''};
-export * from './import-assertion-3_FIXTURE.js' assert {test262_1:'',test262_2:'',test262_3:'',test262_4:''};
+import x from './import-attribute-1_FIXTURE.js' with {test262_1:'',test262_2:'',test262_3:'',test262_4:''};
+import './import-attribute-2_FIXTURE.js' with {test262_1:'',test262_2:'',test262_3:'',test262_4:''};
+export * from './import-attribute-3_FIXTURE.js' with {test262_1:'',test262_2:'',test262_3:'',test262_4:''};
diff --git a/test/language/module-code/import-attributes/import-attribute-newlines.js b/test/language/module-code/import-attributes/import-attribute-newlines.js
index 10cfba52a4..a6bfdfb1ca 100644
--- a/test/language/module-code/import-attributes/import-attribute-newlines.js
+++ b/test/language/module-code/import-attributes/import-attribute-newlines.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -25,7 +25,7 @@ info: |
 negative:
   phase: resolution
   type: SyntaxError
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 flags: [module]
 ---*/
 
@@ -33,7 +33,7 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert
+import x from './import-attribute-1_FIXTURE.js' with
 
 

{
 
@@ -44,7 +44,7 @@ import x from './import-assertion-1_FIXTURE.js' assert
 

''
 
 

};
-import './import-assertion-2_FIXTURE.js' assert
+import './import-attribute-2_FIXTURE.js' with
 
 

{
 
@@ -55,7 +55,7 @@ import './import-assertion-2_FIXTURE.js' assert
 

''
 
 

};
-export * from './import-assertion-3_FIXTURE.js' assert
+export * from './import-attribute-3_FIXTURE.js' with
 
 

{
 
diff --git a/test/language/module-code/import-attributes/import-attribute-trlng-comma.js b/test/language/module-code/import-attributes/import-attribute-trlng-comma.js
index 323c61fac4..6208860560 100644
--- a/test/language/module-code/import-attributes/import-attribute-trlng-comma.js
+++ b/test/language/module-code/import-attributes/import-attribute-trlng-comma.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -22,7 +22,7 @@ info: |
 negative:
   phase: resolution
   type: SyntaxError
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 flags: [module]
 ---*/
 
@@ -30,6 +30,6 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert {test262:'',};
-import './import-assertion-2_FIXTURE.js' assert {test262:'',};
-export * from './import-assertion-3_FIXTURE.js' assert {test262:'',};
+import x from './import-attribute-1_FIXTURE.js' with {test262:'',};
+import './import-attribute-2_FIXTURE.js' with {test262:'',};
+export * from './import-attribute-3_FIXTURE.js' with {test262:'',};
diff --git a/test/language/module-code/import-attributes/import-attribute-value-string-double.js b/test/language/module-code/import-attributes/import-attribute-value-string-double.js
index fc24b2e269..5fcd3b2ef2 100644
--- a/test/language/module-code/import-attributes/import-attribute-value-string-double.js
+++ b/test/language/module-code/import-attributes/import-attribute-value-string-double.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -22,7 +22,7 @@ info: |
 negative:
   phase: resolution
   type: SyntaxError
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 flags: [module]
 ---*/
 
@@ -30,6 +30,6 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert {test262:"\u0078"};
-import './import-assertion-2_FIXTURE.js' assert {test262:"\u0078"};
-export * from './import-assertion-3_FIXTURE.js' assert {test262:"\u0078"};
+import x from './import-attribute-1_FIXTURE.js' with {test262:"\u0078"};
+import './import-attribute-2_FIXTURE.js' with {test262:"\u0078"};
+export * from './import-attribute-3_FIXTURE.js' with {test262:"\u0078"};
diff --git a/test/language/module-code/import-attributes/import-attribute-value-string-single.js b/test/language/module-code/import-attributes/import-attribute-value-string-single.js
index 0e0ef844bf..c3c1b115de 100644
--- a/test/language/module-code/import-attributes/import-attribute-value-string-single.js
+++ b/test/language/module-code/import-attributes/import-attribute-value-string-single.js
@@ -9,8 +9,8 @@ info: |
     import ModuleSpecifier[no LineTerminator here] WithClause;
 
   WithClause:
-    assert {}
-    assert {WithEntries ,opt}
+    AttributesKeyword {}
+    AttributesKeyword {WithEntries ,opt}
 
   WithEntries:
     AttributeKey : StringLiteral
@@ -19,7 +19,7 @@ info: |
   AttributeKey:
     IdentifierName
     StringLiteral
-features: [import-assertions, globalThis]
+features: [import-attributes, globalThis]
 negative:
   phase: resolution
   type: SyntaxError
@@ -30,6 +30,6 @@ $DONOTEVALUATE();
 
 import "./ensure-linking-error_FIXTURE.js";
 
-import x from './import-assertion-1_FIXTURE.js' assert {test262:'\u0078'};
-import './import-assertion-2_FIXTURE.js' assert {test262:'\u0078'};
-export * from './import-assertion-3_FIXTURE.js' assert {test262:'\u0078'};
+import x from './import-attribute-1_FIXTURE.js' with {test262:'\u0078'};
+import './import-attribute-2_FIXTURE.js' with {test262:'\u0078'};
+export * from './import-attribute-3_FIXTURE.js' with {test262:'\u0078'};