| PASS @@toStringTag exists with the appropriate descriptor | |
| PASS Object.prototype.toString | |
| PASS Object.prototype.toString applied after modifying @@toStringTag | |
| PASS Object.prototype.toString applied to a null-prototype instance | |
| PASS Object.prototype.toString applied after nulling the prototype | |
| PASS Object.prototype.toString applied after deleting @@toStringTag | |