diff --git a/modules/facets_form_date_range/tests/src/Kernel/Plugin/facets/widget/DateRangeWidgetTest.php b/modules/facets_form_date_range/tests/src/Kernel/Plugin/facets/widget/DateRangeWidgetTest.php
index 7e5cc24..5daf944 100644
--- a/modules/facets_form_date_range/tests/src/Kernel/Plugin/facets/widget/DateRangeWidgetTest.php
+++ b/modules/facets_form_date_range/tests/src/Kernel/Plugin/facets/widget/DateRangeWidgetTest.php
@@ -68,7 +68,7 @@ class DateRangeWidgetTest extends KernelTestBase {
    * @return array[]
    *   Test cases.
    */
-  public function providerTestPlugin(): array {
+  public static function providerTestPlugin(): array {
     return [
       'date_granularity' => [
         [
diff --git a/tests/src/Kernel/Plugin/facets/widget/CheckboxWidgetTest.php b/tests/src/Kernel/Plugin/facets/widget/CheckboxWidgetTest.php
index faba961..9cb5c60 100644
--- a/tests/src/Kernel/Plugin/facets/widget/CheckboxWidgetTest.php
+++ b/tests/src/Kernel/Plugin/facets/widget/CheckboxWidgetTest.php
@@ -81,7 +81,7 @@ class CheckboxWidgetTest extends KernelTestBase {
    * @return array[]
    *   Test cases.
    */
-  public function providerTestPlugin(): array {
+  public static function providerTestPlugin(): array {
     return [
       'default' => [
         [
diff --git a/tests/src/Kernel/Plugin/facets/widget/DropdownWidgetTest.php b/tests/src/Kernel/Plugin/facets/widget/DropdownWidgetTest.php
index 7cf8c03..1c80a6b 100644
--- a/tests/src/Kernel/Plugin/facets/widget/DropdownWidgetTest.php
+++ b/tests/src/Kernel/Plugin/facets/widget/DropdownWidgetTest.php
@@ -108,7 +108,7 @@ class DropdownWidgetTest extends KernelTestBase {
    * @return array[]
    *   Test cases.
    */
-  public function providerTestPlugin(): array {
+  public static function providerTestPlugin(): array {
     return [
       'default' => [
         [