diff --git a/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php b/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php
index b37260800b..6f0cec3bbe 100644
--- a/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/TestDiscoveryTest.php
@@ -93,7 +93,7 @@ public function infoParserProvider() {
         'group' => 'simpletest',
         'groups' => ['simpletest'],
         'description' => 'Tests the Simpletest UI internal browser.',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
       ],
       // Classname.
       'Drupal\simpletest\Tests\ExampleSimpleTest',
@@ -114,7 +114,7 @@ public function infoParserProvider() {
         'group' => 'simpletest',
         'groups' => ['simpletest'],
         'description' => 'Tests the Simpletest UI internal browser.',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
       ],
       // Classname.
       'Drupal\simpletest\Tests\ExampleSimpleTest',
@@ -137,7 +137,7 @@ public function infoParserProvider() {
         'group' => 'simpletest',
         'groups' => ['simpletest'],
         'description' => 'Tests the Simpletest UI internal browser. * @',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
       ],
       // Classname.
       'Drupal\simpletest\Tests\ExampleSimpleTest',
@@ -158,7 +158,7 @@ public function infoParserProvider() {
         'group' => 'Test',
         'groups' => ['Test', 'simpletest'],
         'description' => 'Tests the Simpletest UI internal browser.',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
       ],
       // Classname.
       'Drupal\simpletest\Tests\ExampleSimpleTest',
@@ -180,7 +180,7 @@ public function infoParserProvider() {
         'group' => 'Test',
         'groups' => ['Test', 'simpletest', 'another', 'more', 'many', 'enough', 'whoa'],
         'description' => 'Tests the Simpletest UI internal browser.',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
       ],
       // Classname.
       'Drupal\simpletest\Tests\ExampleSimpleTest',
@@ -205,7 +205,7 @@ public function infoParserProvider() {
       [
         'name' => 'Drupal\simpletest\Tests\ExampleSimpleTest',
         'description' => 'Tests the Simpletest UI internal browser.',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
         'requires' => ['module' => ['test']],
         'group' => 'simpletest',
         'groups' => ['simpletest'],
@@ -228,7 +228,7 @@ public function infoParserProvider() {
       [
         'name' => 'Drupal\simpletest\Tests\ExampleSimpleTest',
         'description' => 'Tests the Simpletest UI internal browser.',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
         'requires' => ['module' => ['test', 'test1', 'test2']],
         'group' => 'simpletest',
         'groups' => ['simpletest'],
@@ -251,7 +251,7 @@ public function infoParserProvider() {
       [
         'name' => 'Drupal\simpletest\Tests\ExampleSimpleTest',
         'description' => 'Tests the Simpletest UI internal browser. And the summary line continues an there is no gap to the annotation.',
-        'type' => 'Simpletest',
+        'type' => 'UNKNOWN',
         'group' => 'simpletest',
         'groups' => ['simpletest'],
       ],