diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index c75da59c7a..d23a1f3f53 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -449,10 +449,10 @@ function install_begin_request($class_loader, &$install_state) {
   $container->get('string_translation')
     ->addTranslator($container->get('string_translator.file_translation'));
 
-  // Add list of all available profiles to the installation state.
+  // Add list of all available profiles to the installation state, including
+  // test profiles.
   $listing = new ExtensionDiscovery($container->get('app.root'));
-  $listing->setProfileDirectories([]);
-  $install_state['profiles'] += $listing->scan('profile');
+  $install_state['profiles'] += $listing->scan('profile', TRUE);
 
   // Prime drupal_get_filename()'s static cache.
   foreach ($install_state['profiles'] as $name => $profile) {
diff --git a/core/lib/Drupal/Core/Command/InstallCommand.php b/core/lib/Drupal/Core/Command/InstallCommand.php
index bff4bc471d..1bd5069bbc 100644
--- a/core/lib/Drupal/Core/Command/InstallCommand.php
+++ b/core/lib/Drupal/Core/Command/InstallCommand.php
@@ -310,12 +310,11 @@ protected function validateProfile($install_profile, SymfonyStyle $io) {
    *   An array of profile descriptions keyed by the profile machine name.
    */
   protected function getProfiles($include_hidden = FALSE, $auto_select_distributions = TRUE) {
-    // Build a list of all available profiles.
+    // Build a list of all available profiles, including test profiles.
     $listing = new ExtensionDiscovery(getcwd(), FALSE);
-    $listing->setProfileDirectories([]);
     $profiles = [];
     $info_parser = new InfoParserDynamic();
-    foreach ($listing->scan('profile') as $profile) {
+    foreach ($listing->scan('profile', TRUE) as $profile) {
       $details = $info_parser->parse($profile->getPathname());
       // Don't show hidden profiles.
       if (!$include_hidden && !empty($details['hidden'])) {
diff --git a/core/modules/config/tests/src/Functional/ConfigInstallProfileUnmetDependenciesTest.php b/core/modules/config/tests/src/Functional/ConfigInstallProfileUnmetDependenciesTest.php
index ab71faa3a2..466310d4a8 100644
--- a/core/modules/config/tests/src/Functional/ConfigInstallProfileUnmetDependenciesTest.php
+++ b/core/modules/config/tests/src/Functional/ConfigInstallProfileUnmetDependenciesTest.php
@@ -58,7 +58,7 @@ protected function setUp() {
   protected function copyTestingOverrides() {
     $dest = $this->siteDirectory . '/profiles/testing_config_overrides';
     mkdir($dest, 0777, TRUE);
-    $source = DRUPAL_ROOT . '/core/profiles/testing_config_overrides';
+    $source = DRUPAL_ROOT . '/core/modules/config/tests/profiles/testing_config_overrides';
     $iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($source, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::SELF_FIRST);
     foreach ($iterator as $item) {
       if ($item->isDir()) {
diff --git a/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php b/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php
index 1ff6a84550..26137e68e8 100644
--- a/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php
+++ b/core/modules/system/tests/src/Kernel/Common/SystemListingTest.php
@@ -23,7 +23,7 @@ public function testDirectoryPrecedence() {
       // When both copies of the module are compatible with Drupal core, the
       // copy in the profile directory takes precedence.
       'drupal_system_listing_compatible_test' => [
-        'core/profiles/testing/modules',
+        'core/profiles/tests/testing/modules',
         'core/modules/system/tests/modules',
       ],
     ];
@@ -41,7 +41,7 @@ public function testDirectoryPrecedence() {
     // Now scan the directories and check that the files take precedence as
     // expected.
     $listing = new ExtensionDiscovery($this->root);
-    $listing->setProfileDirectories(['core/profiles/testing']);
+    $listing->setProfileDirectories(['core/profiles/tests/testing']);
     $files = $listing->scan('module');
     foreach ($expected_directories as $module => $directories) {
       $expected_directory = array_shift($directories);
@@ -58,7 +58,7 @@ public function testDirectoryPrecedence() {
    */
   public function testFileScanIgnoreDirectory() {
     $listing = new ExtensionDiscovery($this->root, FALSE);
-    $listing->setProfileDirectories(['core/profiles/testing']);
+    $listing->setProfileDirectories(['core/profiles/tests/testing']);
     $files = $listing->scan('module');
     $this->assertArrayHasKey('drupal_system_listing_compatible_test', $files);
 
@@ -70,7 +70,7 @@ public function testFileScanIgnoreDirectory() {
 
     $this->setSetting('file_scan_ignore_directories', ['drupal_system_listing_compatible_test']);
     $listing = new ExtensionDiscovery($this->root, FALSE);
-    $listing->setProfileDirectories(['core/profiles/testing']);
+    $listing->setProfileDirectories(['core/profiles/tests/testing']);
     $files = $listing->scan('module');
     $this->assertArrayNotHasKey('drupal_system_listing_compatible_test', $files);
   }
diff --git a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
index 698de170a6..ac85c714c5 100644
--- a/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
+++ b/core/modules/system/tests/src/Kernel/Extension/ModuleHandlerTest.php
@@ -166,7 +166,7 @@ public function testUninstallProfileDependencyBC() {
     // testing profile as it is not the currently active profile and we don't
     // yet have any cached way to retrieve its location.
     // @todo Remove as part of https://www.drupal.org/node/2186491
-    drupal_get_filename('profile', $profile, 'core/profiles/' . $profile . '/' . $profile . '.info.yml');
+    drupal_get_filename('profile', $profile, 'core/profiles/tests/' . $profile . '/' . $profile . '.info.yml');
     $this->enableModules(['module_test', $profile]);
 
     $data = \Drupal::service('extension.list.module')->getList();
@@ -201,7 +201,7 @@ public function testUninstallProfileDependency() {
     // active profile and we don't yet have any cached way to retrieve its
     // location.
     // @todo Remove as part of https://www.drupal.org/node/2186491
-    drupal_get_filename('profile', $profile, 'core/profiles/' . $profile . '/' . $profile . '.info.yml');
+    drupal_get_filename('profile', $profile, 'core/profiles/tests/' . $profile . '/' . $profile . '.info.yml');
     $this->enableModules(['module_test', $profile]);
 
     $data = \Drupal::service('extension.list.module')->reset()->getList();
@@ -241,7 +241,7 @@ public function testProfileAllDependencies() {
     // active profile and we don't yet have any cached way to retrieve its
     // location.
     // @todo Remove as part of https://www.drupal.org/node/2186491
-    drupal_get_filename('profile', $profile, 'core/profiles/' . $profile . '/' . $profile . '.info.yml');
+    drupal_get_filename('profile', $profile, 'core/profiles/tests/' . $profile . '/' . $profile . '.info.yml');
     $this->enableModules(['module_test', $profile]);
 
     $data = \Drupal::service('extension.list.module')->reset()->getList();
diff --git a/core/modules/system/tests/src/Kernel/Installer/InstallerDependenciesResolutionTest.php b/core/modules/system/tests/src/Kernel/Installer/InstallerDependenciesResolutionTest.php
index d4d4c3194a..fd313ef495 100644
--- a/core/modules/system/tests/src/Kernel/Installer/InstallerDependenciesResolutionTest.php
+++ b/core/modules/system/tests/src/Kernel/Installer/InstallerDependenciesResolutionTest.php
@@ -24,7 +24,7 @@ public function testDependenciesResolution() {
     // testing profile as it is not the currently active profile and we don't
     // yet have any cached way to retrieve its location.
     // @todo Remove as part of https://www.drupal.org/node/2186491
-    drupal_get_filename('profile', 'testing_missing_dependencies', 'core/profiles/testing_missing_dependencies/testing_missing_dependencies.info.yml');
+    drupal_get_filename('profile', 'testing_missing_dependencies', 'core/profiles/tests/testing_missing_dependencies/testing_missing_dependencies.info.yml');
 
     $info = drupal_verify_profile([
       'parameters' => ['profile' => 'testing_missing_dependencies'],
diff --git a/core/tests/Drupal/FunctionalTests/Installer/InstallProfileDependenciesBcTest.php b/core/tests/Drupal/FunctionalTests/Installer/InstallProfileDependenciesBcTest.php
index 4152633344..41e2da3384 100644
--- a/core/tests/Drupal/FunctionalTests/Installer/InstallProfileDependenciesBcTest.php
+++ b/core/tests/Drupal/FunctionalTests/Installer/InstallProfileDependenciesBcTest.php
@@ -20,7 +20,7 @@ class InstallProfileDependenciesBcTest extends BrowserTestBase {
   /**
    * Tests that the install profile BC layer for dependencies key works.
    *
-   * @expectedDeprecation The install profile core/profiles/testing_install_profile_dependencies_bc/testing_install_profile_dependencies_bc.info.yml only implements a 'dependencies' key. As of Drupal 8.6.0 profile's support a new 'install' key for modules that should be installed but not depended on. See https://www.drupal.org/node/2952947.
+   * @expectedDeprecation The install profile core/profiles/tests/testing_install_profile_dependencies_bc/testing_install_profile_dependencies_bc.info.yml only implements a 'dependencies' key. As of Drupal 8.6.0 profile's support a new 'install' key for modules that should be installed but not depended on. See https://www.drupal.org/node/2952947.
    */
   public function testUninstallingModules() {
     $user = $this->drupalCreateUser(['administer modules']);
diff --git a/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php b/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php
index 4772366c11..0faad70c2f 100644
--- a/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Bootstrap/GetFilenameTest.php
@@ -42,7 +42,7 @@ public function testDrupalGetFilename() {
 
     // Retrieving the location of a profile. Profiles are a special case with
     // a fixed location and naming.
-    $this->assertIdentical(drupal_get_filename('profile', 'testing'), 'core/profiles/testing/testing.info.yml');
+    $this->assertIdentical(drupal_get_filename('profile', 'testing'), 'core/profiles/tests/testing/testing.info.yml');
 
     // Set a custom error handler so we can ignore the file not found error.
     set_error_handler(function ($severity, $message, $file, $line) {