diff --git a/src/Tests/ProfileCRUDTest.php b/src/Tests/ProfileCRUDTest.php
index 7572e42..07f794e 100644
--- a/src/Tests/ProfileCRUDTest.php
+++ b/src/Tests/ProfileCRUDTest.php
@@ -248,9 +248,121 @@ class ProfileCRUDTest extends ProfileTestBase {
     $this->drupalGet('admin/config');
     $this->clickLink('User profiles');
     $this->assertResponse(200);
-    $this->assertUrl('admin/config/people/profiles');
+    $this->assertUrl($profile1->toUrl('collection')->toString());
 
     $this->assertLink($profile1->label());
     $this->assertLinkByHref($profile2->toUrl('canonical')->toString());
   }
+
+  /**
+   * Tests mark as default action.
+   */
+  public function testDefaultAction() {
+    $types_data = [
+      'profile_type_0' => [
+        'label' => $this->randomMachineName(),
+        'multiple' => TRUE,
+      ],
+      'profile_type_1' => [
+        'label' => $this->randomMachineName(),
+        'multiple' => TRUE,
+      ],
+    ];
+
+    /** @var ProfileType[] $types */
+    $types = [];
+    foreach ($types_data as $id => $values) {
+      $types[$id] = $this->createProfileType($id, $values['label']);
+    }
+
+    $this->user1 = User::create([
+      'name' => $this->randomMachineName(),
+      'mail' => $this->randomMachineName() . '@example.com',
+    ]);
+    $this->user1->save();
+    $this->user2 = User::create([
+      'name' => $this->randomMachineName(),
+      'mail' => $this->randomMachineName() . '@example.com',
+    ]);
+    $this->user2->save();
+
+    // Create new profiles.
+    $profile_profile_type_0_user1_1 = Profile::create($expected = [
+      'type' => $types['profile_type_0']->id(),
+      'uid' => $this->user1->id(),
+      'status' => PROFILE_ACTIVE,
+    ]);
+    $profile_profile_type_0_user1_1->save();
+    $profile_profile_type_0_user1_2 = Profile::create($expected = [
+      'type' => $types['profile_type_0']->id(),
+      'uid' => $this->user1->id(),
+      'status' => PROFILE_ACTIVE,
+    ]);
+    $profile_profile_type_0_user1_2->save();
+    $profile_profile_type_1_user1 = Profile::create($expected = [
+      'type' => $types['profile_type_1']->id(),
+      'uid' => $this->user1->id(),
+      'status' => PROFILE_ACTIVE,
+    ]);
+    $profile_profile_type_1_user1->save();
+    $profile_profile_type_1_user2 = Profile::create($expected = [
+      'type' => $types['profile_type_1']->id(),
+      'uid' => $this->user2->id(),
+      'status' => PROFILE_ACTIVE,
+    ]);
+    $profile_profile_type_1_user2->save();
+    $profile_profile_type_1_user1_inactive = Profile::create($expected = [
+      'type' => $types['profile_type_1']->id(),
+      'uid' => $this->user1->id(),
+      'status' => PROFILE_NOT_ACTIVE,
+    ]);
+    $profile_profile_type_1_user1_inactive->save();
+    $profile_profile_type_1_user1_active = Profile::create($expected = [
+      'type' => $types['profile_type_1']->id(),
+      'uid' => $this->user1->id(),
+      'status' => PROFILE_ACTIVE,
+    ]);
+    $profile_profile_type_1_user1_active->save();
+
+    $this->drupalLogin($this->adminUser);
+
+    $this->drupalGet('admin/config');
+    $this->clickLink('User profiles');
+    $this->assertResponse(200);
+
+    // Check whether all have links "Mark as default".
+    $this->assertLinkByHref($profile_profile_type_0_user1_1->toUrl('set-default')->toString());
+    $this->assertLinkByHref($profile_profile_type_0_user1_2->toUrl('set-default')->toString());
+    $this->assertLinkByHref($profile_profile_type_1_user1->toUrl('set-default')->toString());
+    $this->assertLinkByHref($profile_profile_type_1_user2->toUrl('set-default')->toString());
+    $this->assertLinkByHref($profile_profile_type_1_user1_inactive->toUrl('set-default')->toString());
+    $this->assertLinkByHref($profile_profile_type_1_user1_active->toUrl('set-default')->toString());
+
+    // @todo mark $profile_profile_type_0_user1_1 as default $profile_profile_type_0_user1_2 should stay not default
+    $this->drupalGet($profile_profile_type_0_user1_1->toUrl('set-default')->toString());
+    $this->verbose($profile_profile_type_0_user1_1->isDefault() == 1 ? 'true' : 'false');
+    $this->assertTrue($profile_profile_type_0_user1_1->isDefault());
+    $this->assertFalse($profile_profile_type_0_user1_2->isDefault());
+    // @todo mark $profile_profile_type_0_user1_2 as default $profile_profile_type_0_user1_1 should become not default
+    $this->drupalGet($profile_profile_type_0_user1_2->toUrl('set-default')->toString());
+    $this->assertTrue($profile_profile_type_0_user1_2->isDefault());
+    $this->assertFalse($profile_profile_type_0_user1_1->isDefault());
+    // @todo mark $profile_profile_type_1_user1 as default $profile_profile_type_1_user2 should stay not default
+    $this->drupalGet($profile_profile_type_1_user1->toUrl('set-default')->toString());
+    $this->assertTrue($profile_profile_type_1_user1->isDefault());
+    $this->assertFalse($profile_profile_type_1_user2->isDefault());
+    // @todo mark $profile_profile_type_1_user2 as default $profile_profile_type_1_user1 should stay default
+    $this->drupalGet($profile_profile_type_1_user2->toUrl('set-default')->toString());
+    $this->assertTrue($profile_profile_type_1_user2->isDefault());
+    $this->assertTrue($profile_profile_type_1_user1->isDefault());
+    // @todo mark $profile_profile_type_1_user1_inactive as default $profile_profile_type_1_user1_active should stay not default
+    $this->drupalGet($profile_profile_type_1_user1_inactive->toUrl('set-default')->toString());
+    $this->assertTrue($profile_profile_type_1_user1_inactive->isDefault());
+    $this->assertFalse($profile_profile_type_1_user1_active->isDefault());
+    // @todo mark $profile_profile_type_1_user1_active as default $profile_profile_type_1_user1_inactive should stay default
+    $this->drupalGet($profile_profile_type_1_user1_active->toUrl('set-default')->toString());
+    $this->assertTrue($profile_profile_type_1_user1_active->isDefault());
+    $this->assertTrue($profile_profile_type_1_user1_inactive->isDefault());
+  }
+
 }
diff --git a/src/Tests/ProfileTabTest.php b/src/Tests/ProfileTabTest.php
index 182eb3c..45af17b 100644
--- a/src/Tests/ProfileTabTest.php
+++ b/src/Tests/ProfileTabTest.php
@@ -95,7 +95,7 @@ class ProfileTabTest extends LocalTasksTest {
     $this->drupalGet('admin/config');
     $this->clickLink('User profiles');
     $this->assertResponse(200);
-    $this->assertUrl('admin/config/people/profiles');
+    $this->assertUrl($profile1->toUrl('collection')->toString());
 
     $this->assertLink($profile1->label());
     $this->assertLinkByHref($profile2->toUrl('canonical')->toString());