diff --git a/modules/localgov_services_navigation/tests/src/FunctionalJavascript/EntityReferenceServicesAutocompleteTest.php b/modules/localgov_services_navigation/tests/src/FunctionalJavascript/EntityReferenceServicesAutocompleteTest.php
index a522fbe..34d8445 100644
--- a/modules/localgov_services_navigation/tests/src/FunctionalJavascript/EntityReferenceServicesAutocompleteTest.php
+++ b/modules/localgov_services_navigation/tests/src/FunctionalJavascript/EntityReferenceServicesAutocompleteTest.php
@@ -16,6 +16,9 @@
 class EntityReferenceServicesAutocompleteTest extends WebDriverTestBase {
 
   use ContentTypeCreationTrait;
+  // FIXME: Replace with EntityReferenceFieldCreationTrait when Drupal 10.1 is
+  // end of life.
+  // @phpstan-ignore-next-line.
   use EntityReferenceTestTrait;
   use NodeCreationTrait;
 
diff --git a/modules/localgov_services_navigation/tests/src/Kernel/ChildReferencesTest.php b/modules/localgov_services_navigation/tests/src/Kernel/ChildReferencesTest.php
index 726b08b..4a456dc 100644
--- a/modules/localgov_services_navigation/tests/src/Kernel/ChildReferencesTest.php
+++ b/modules/localgov_services_navigation/tests/src/Kernel/ChildReferencesTest.php
@@ -24,6 +24,9 @@
 class ChildReferencesTest extends KernelTestBase {
 
   use ContentTypeCreationTrait;
+  // FIXME: Replace with EntityReferenceFieldCreationTrait when Drupal 10.1 is
+  // end of life.
+  // @phpstan-ignore-next-line.
   use EntityReferenceTestTrait;
   use NodeCreationTrait;
   use PathautoTestHelperTrait;
diff --git a/modules/localgov_services_navigation/tests/src/Kernel/ParentFieldPathautoTest.php b/modules/localgov_services_navigation/tests/src/Kernel/ParentFieldPathautoTest.php
index c49a934..5191078 100644
--- a/modules/localgov_services_navigation/tests/src/Kernel/ParentFieldPathautoTest.php
+++ b/modules/localgov_services_navigation/tests/src/Kernel/ParentFieldPathautoTest.php
@@ -18,6 +18,9 @@
 class ParentFieldPathautoTest extends KernelTestBase {
 
   use ContentTypeCreationTrait;
+  // FIXME: Replace with EntityReferenceFieldCreationTrait when Drupal 10.1 is
+  // end of life.
+  // @phpstan-ignore-next-line.
   use EntityReferenceTestTrait;
   use NodeCreationTrait;
   use PathautoTestHelperTrait;