# Script tests ## Import attributes & JSON/CSS modules The import attributes proposal changed the keyword from `assert` to `with`, after that it was already been implemented and shipped in some browsers. Thus, there are some implementations that only support the `assert` syntax and others that only support the `with` syntax. For this reason, the import attributes, JSON modules and CSS modules are duplicated to use both keywords: | `with` keyword | `assert` keyword | |:----------------------|:---------------------------| | `./import-attributes` | `./import-assertions` | | `./json-module` | `./json-module-assertions` | | `./css-module` | `./css-module-assertions` | All changes in one folder should be reflected in the corresponding folder, because the two syntaxes have the same semantics. The web compatibility of removing the `assert` keyword is being investigated. If it will be deemed feasible, it will be removed from the proposal and the `assert` tests can be deleted.