diff --git a/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php b/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
index 0baf1e19e7c..4c424e55f5e 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/ThemeInstallerTest.php
@@ -242,7 +242,7 @@ class ThemeInstallerTest extends KernelTestBase {
     $this->assertTrue(isset($themes[$other_name]));
 
     try {
-      $message = 'ThemeInstaller::uninstall() throws InvalidArgumentException upon disabling default theme.';
+      $message = 'ThemeInstaller::uninstall() throws InvalidArgumentException upon uninstalling default theme.';
       $this->themeInstaller()->uninstall([$name]);
       $this->fail($message);
     }
diff --git a/core/tests/Drupal/KernelTests/KernelTestBase.php b/core/tests/Drupal/KernelTests/KernelTestBase.php
index c98b77fd9fe..5544dc32470 100644
--- a/core/tests/Drupal/KernelTests/KernelTestBase.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBase.php
@@ -722,7 +722,7 @@ abstract class KernelTestBase extends TestCase implements ServiceProviderInterfa
   protected function installConfig($modules) {
     foreach ((array) $modules as $module) {
       if (!$this->container->get('module_handler')->moduleExists($module)) {
-        throw new \LogicException("$module module is not enabled.");
+        throw new \LogicException("$module module is not installed.");
       }
       try {
         $this->container->get('config.installer')->installDefaultConfig('module', $module);
@@ -754,7 +754,7 @@ abstract class KernelTestBase extends TestCase implements ServiceProviderInterfa
     // failures, we only allow the schema of explicitly loaded/enabled modules
     // to be installed.
     if (!$module_handler->moduleExists($module)) {
-      throw new \LogicException("$module module is not enabled.");
+      throw new \LogicException("$module module is not installed.");
     }
     $specification = SchemaInspector::getTablesSpecification($module_handler, $module);
     /** @var \Drupal\Core\Database\Schema $schema */
@@ -858,7 +858,7 @@ abstract class KernelTestBase extends TestCase implements ServiceProviderInterfa
     $module_handler->reload();
     foreach ($modules as $module) {
       if (!$module_handler->moduleExists($module)) {
-        throw new \RuntimeException("$module module is not enabled after enabling it.");
+        throw new \RuntimeException("$module module is not installed after installing it.");
       }
     }
   }
@@ -884,7 +884,7 @@ abstract class KernelTestBase extends TestCase implements ServiceProviderInterfa
     $extension_config = $this->config('core.extension');
     foreach ($modules as $module) {
       if (!$module_handler->moduleExists($module)) {
-        throw new \LogicException("$module module cannot be disabled because it is not enabled.");
+        throw new \LogicException("$module module cannot be uninstalled because it is not installed.");
       }
       unset($module_filenames[$module]);
       $extension_config->clear('module.' . $module);
@@ -903,7 +903,7 @@ abstract class KernelTestBase extends TestCase implements ServiceProviderInterfa
     $module_handler->reload();
     foreach ($modules as $module) {
       if ($module_handler->moduleExists($module)) {
-        throw new \RuntimeException("$module module is not disabled after disabling it.");
+        throw new \RuntimeException("$module module is not uninstalled after uninstalling it.");
       }
     }
   }