2c2
< index e0bda7c..0c31f8c 100644
---
> index e0bda7c..d5217b5 100644
4a5,13
> @@ -23,7 +23,7 @@ class JsonApiDefaultsFunctionalTest extends JsonApiExtrasFunctionalTestBase {
>    /**
>     * {@inheritdoc}
>     */
> -  public static $modules = [
> +  protected static $modules = [
>      'jsonapi_defaults',
>    ];
>  
58c67
< index c40a50c..d60fa0d 100644
---
> index c40a50c..aaa7e81 100644
60a70,78
> @@ -27,7 +27,7 @@ class JsonApiExtrasFunctionalTest extends JsonApiFunctionalTestBase {
>    /**
>     * {@inheritdoc}
>     */
> -  public static $modules = [
> +  protected static $modules = [
>      'jsonapi_extras',
>      'basic_auth',
>      'jsonapi_test_resource_type_building',
84c102
< index a96221b..5767ae1 100644
---
> index a96221b..968c6d6 100644
86a105,113
> @@ -29,7 +29,7 @@ class EntityResourceTest extends KernelTestBase {
>    /**
>     * {@inheritdoc}
>     */
> -  public static $modules = [
> +  protected static $modules = [
>      'node',
>      'jsonapi',
>      'serialization',
97c124
< index 72e4feb..4fb4dd6 100644
---
> index 72e4feb..b3e0e84 100644
99a127,135
> @@ -38,7 +38,7 @@ class EntityToJsonApiTest extends JsonapiKernelTestBase {
>    /**
>     * {@inheritdoc}
>     */
> -  public static $modules = [
> +  protected static $modules = [
>      'jsonapi',
>      'jsonapi_extras',
>      'field',