diff --git a/modules/apigee_m10n_add_credit/tests/src/Functional/ApigeeX/GeneralSettingsConfigFormTest.php b/modules/apigee_m10n_add_credit/tests/src/Functional/ApigeeX/GeneralSettingsConfigFormTest.php
index 18aacba1..071d5011 100644
--- a/modules/apigee_m10n_add_credit/tests/src/Functional/ApigeeX/GeneralSettingsConfigFormTest.php
+++ b/modules/apigee_m10n_add_credit/tests/src/Functional/ApigeeX/GeneralSettingsConfigFormTest.php
@@ -39,6 +39,13 @@ class GeneralSettingsConfigFormTest extends AddCreditFunctionalTestBase {
    */
   protected $product;
 
+  /**
+   * A developer user.
+   *
+   * @var \Drupal\user\UserInterface
+   */
+  protected $developer;
+
   /**
    * {@inheritdoc}
    *
diff --git a/modules/apigee_m10n_add_credit/tests/src/FunctionalJavascript/ApigeeX/UpdateBillingTypeTest.php b/modules/apigee_m10n_add_credit/tests/src/FunctionalJavascript/ApigeeX/UpdateBillingTypeTest.php
index ac58ca9a..399aa59a 100644
--- a/modules/apigee_m10n_add_credit/tests/src/FunctionalJavascript/ApigeeX/UpdateBillingTypeTest.php
+++ b/modules/apigee_m10n_add_credit/tests/src/FunctionalJavascript/ApigeeX/UpdateBillingTypeTest.php
@@ -38,6 +38,13 @@ class UpdateBillingTypeTest extends AddCreditFunctionalJavascriptTestBase {
    */
   protected $developer;
 
+  /**
+   * A developer user.
+   *
+   * @var \Drupal\user\UserInterface
+   */
+  protected $developeruser;
+
   /**
    * {@inheritdoc}
    */
diff --git a/tests/src/Kernel/Plugin/Field/FieldFormatter/DateAndTextFormatterKernelTest.php b/tests/src/Kernel/Plugin/Field/FieldFormatter/DateAndTextFormatterKernelTest.php
index 858b8343..fbeb5ab8 100644
--- a/tests/src/Kernel/Plugin/Field/FieldFormatter/DateAndTextFormatterKernelTest.php
+++ b/tests/src/Kernel/Plugin/Field/FieldFormatter/DateAndTextFormatterKernelTest.php
@@ -54,6 +54,34 @@ class DateAndTextFormatterKernelTest extends MonetizationKernelTestBase {
    */
   protected $settings;
 
+  /**
+   * The name of the entity type to use in this test.
+   *
+   * @var string
+   */
+  protected $entityType;
+
+  /**
+   * The bundle being tested.
+   *
+   * @var string
+   */
+  protected $bundle;
+
+  /**
+   * Holds the randomly-generated name of a field.
+   *
+   * @var string
+   */
+  protected $fieldName;
+
+  /**
+   * Testing profile type entity view display.
+   *
+   * @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface
+   */
+  protected $display;
+
   /**
    * Extra modules to enable.
    *