diff --git a/tests/src/Kernel/FieldTest.php b/tests/src/Kernel/FieldTest.php
index 20839ac..6990c77 100644
--- a/tests/src/Kernel/FieldTest.php
+++ b/tests/src/Kernel/FieldTest.php
@@ -26,6 +26,11 @@ use Drupal\node\Entity\NodeType;
 class FieldTest extends KernelTestBase {
 
   /**
+   * @var \Drupal\filter\FilterFormatInterface
+   */
+  protected $testFormat;
+
+  /**
    * Modules to enable.
    *
    * @var array
@@ -61,28 +66,28 @@ class FieldTest extends KernelTestBase {
       'label' => 'Test field',
     ]);
     $field->save();
-  }
 
-  /**
-   * Tests [entity:field_name] tokens.
-   */
-  public function testEntityFieldTokens() {
-    // Create a node with a value in the text field and test its token.
-    $format = FilterFormat::create([
+    $this->testFormat = FilterFormat::create([
       'format' => 'test',
       'weight' => 1,
       'filters' => [
         'filter_html_escape' => ['status' => TRUE],
       ],
     ]);
-    $format->save();
+    $this->testFormat->save();
+  }
 
+  /**
+   * Tests [entity:field_name] tokens.
+   */
+  public function testEntityFieldTokens() {
+    // Create a node with a value in the text field and test its token.
     $entity = Node::create([
       'title' => 'Test node title',
       'type' => 'article',
       'test_field' => [
         'value' => 'foo',
-        'format' => $format->id(),
+        'format' => $this->testFormat->id(),
       ],
     ]);
     $entity->save();
@@ -152,24 +157,20 @@ class FieldTest extends KernelTestBase {
    */
   public function testTokenViewMode() {
     $value = 'A really long string that should be trimmed by the special formatter on token view we are going to have.';
+
+    // The formatter we are going to use will eventually call Unicode::strlen.
+    // This expects that the Unicode has already been explicitly checked, which
+    // happens in DrupalKernel. But since that doesn't run in kernel tests, we
+    // explicitly call this here.
     Unicode::check();
 
     // Create a node with a value in the text field and test its token.
-    $format = FilterFormat::create([
-      'format' => 'test',
-      'weight' => 1,
-      'filters' => [
-        'filter_html_escape' => ['status' => TRUE],
-      ],
-    ]);
-    $format->save();
-
     $entity = Node::create([
       'title' => 'Test node title',
       'type' => 'article',
       'test_field' => [
         'value' => $value,
-        'format' => $format->id(),
+        'format' => $this->testFormat->id(),
       ],
     ]);
     $entity->save();
@@ -178,6 +179,10 @@ class FieldTest extends KernelTestBase {
       'test_field' => Markup::create($value),
     ]);
 
+    // Now, create a token view mode which sets a different format for
+    // test_field. When replacing tokens, this formatter should be picked over
+    // the default formatter for the field type.
+    // @see field_tokens().
     $view_mode = EntityViewMode::create([
       'id' => 'node.token',
       'targetEntityType' => 'node',