diff --git a/Jint.Tests.Test262/Test262Test.cs b/Jint.Tests.Test262/Test262Test.cs
index 3561669fb9..d41d6dad2c 100644
--- a/Jint.Tests.Test262/Test262Test.cs
+++ b/Jint.Tests.Test262/Test262Test.cs
@@ -51,7 +51,11 @@ private static Engine BuildTestExecutor(Test262File file, Test262AgentManager? a
             // Capture Test262 async test markers from $DONE via doneprintHandle.js
             if (message.StartsWith("Test262:AsyncTest", StringComparison.Ordinal))
             {
-                _asyncResult = message;
+                // AsyncTestFailure takes priority - once recorded, never overwrite with AsyncTestComplete
+                if (_asyncResult is null || !_asyncResult.StartsWith("Test262:AsyncTestFailure:", StringComparison.Ordinal))
+                {
+                    _asyncResult = message;
+                }
             }
             return message;
         }));
diff --git a/Jint/AstExtensions.cs b/Jint/AstExtensions.cs
index 55ab488298..0dbfa72940 100644
--- a/Jint/AstExtensions.cs
+++ b/Jint/AstExtensions.cs
@@ -79,7 +79,8 @@ or NodeType.FunctionExpression
             or NodeType.YieldExpression
             or NodeType.TemplateLiteral
             or NodeType.ArrayExpression
-            or NodeType.ObjectExpression)
+            or NodeType.ObjectExpression
+            or NodeType.AwaitExpression)
         {
             var context = engine._activeEvaluationContext ?? new EvaluationContext(engine);
             var result = JintExpression.Build(expression).GetValue(context);
diff --git a/Jint/Native/Function/ScriptFunction.cs b/Jint/Native/Function/ScriptFunction.cs
index 90554e2073..3b3f3dda2d 100644
--- a/Jint/Native/Function/ScriptFunction.cs
+++ b/Jint/Native/Function/ScriptFunction.cs
@@ -47,7 +47,8 @@ internal ScriptFunction(
 
         if (!function.Strict
             && function.Function is not ArrowFunctionExpression
-            && !function.Function.Generator)
+            && !function.Function.Generator
+            && !function.Function.Async)
         {
             SetProperty(KnownKeys.Arguments, new GetSetPropertyDescriptor.ThrowerPropertyDescriptor(engine, PropertyFlag.Configurable));
             SetProperty(KnownKeys.Caller, new PropertyDescriptor(Undefined, PropertyFlag.Configurable));