diff --git a/core/modules/config/tests/config_test/config/install/config_test.validation.yml b/core/modules/config/tests/config_test/config/install/config_test.validation.yml
index 47b397dec8..37414689fd 100644
--- a/core/modules/config/tests/config_test/config/install/config_test.validation.yml
+++ b/core/modules/config/tests/config_test/config/install/config_test.validation.yml
@@ -1,4 +1,4 @@
-llama: meh
+llama: llama
 cat:
   type: kitten
   count: 2
diff --git a/core/modules/config/tests/config_test/src/ConfigValidation.php b/core/modules/config/tests/config_test/src/ConfigValidation.php
index c8e04d88cc..8cb57b8eed 100644
--- a/core/modules/config/tests/config_test/src/ConfigValidation.php
+++ b/core/modules/config/tests/config_test/src/ConfigValidation.php
@@ -18,7 +18,7 @@ class ConfigValidation {
    *   The validation execution context.
    */
   public static function validateLlama($object, ExecutionContextInterface $context) {
-    if (in_array($object, ['llama', 'alpaca', 'guanaco', 'vicuña'], TRUE)) {
+    if (!in_array($object, ['llama', 'alpaca', 'guanaco', 'vicuña'], TRUE)) {
       $context->addViolation('no valid llama');
     }
   }
diff --git a/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php b/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php
index d7b9ea2139..f8042dfcfa 100644
--- a/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php
+++ b/core/tests/Drupal/KernelTests/Config/TypedConfigTest.php
@@ -43,7 +43,7 @@ public function testTypedDataAPI() {
     // Test a primitive.
     $string_data = $typed_config->get('llama');
     $this->assertInstanceOf(StringInterface::class, $string_data);
-    $this->assertEquals('meh', $string_data->getValue());
+    $this->assertEquals('llama', $string_data->getValue());
 
     // Test complex data.
     $mapping = $typed_config->get('cat');
@@ -85,7 +85,7 @@ public function testSimpleConfigValidation() {
     $this->assertEmpty($result);
 
     // Test constraints on primitive types.
-    $config->set('llama', 'muh');
+    $config->set('llama', 'elephant');
     $config->save();
 
     $typed_config = $typed_config_manager->get('config_test.validation');
@@ -95,7 +95,7 @@ public function testSimpleConfigValidation() {
     $this->assertEquals('no valid llama', $result->get(0)->getMessage());
 
     // Test constraints on mapping.
-    $config->set('llama', 'meh');
+    $config->set('llama', 'llama');
     $config->set('cat.type', 'nyans');
     $config->save();