diff --git a/modules/apigee_edge_teams/tests/src/Functional/ApigeeX/TeamMembershipManagerTest.php b/modules/apigee_edge_teams/tests/src/Functional/ApigeeX/TeamMembershipManagerTest.php
new file mode 100644
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+++ b/modules/apigee_edge_teams/tests/src/Functional/ApigeeX/TeamMembershipManagerTest.php
@@ -0,0 +1,193 @@
+<?php
+
+/**
+ * Copyright 2023 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+namespace Drupal\Tests\apigee_edge_teams\Functional\ApigeeX;
+
+use Apigee\Edge\Structure\AttributesProperty;
+use Drupal\Core\Session\UserSession;
+use Drupal\user\Entity\User;
+
+/**
+ * Team membership manager service test.
+ *
+ * @group apigee_edge
+ * @group apigee_edge_teams
+ */
+class TeamMembershipManagerTest extends ApigeeEdgeTeamsFunctionalTestBase {
+
+  /**
+   * The developer entity storage.
+   *
+   * @var \Drupal\apigee_edge\Entity\Storage\DeveloperStorageInterface
+   */
+  protected $developerStorage;
+
+  /**
+   * The team entity storage.
+   *
+   * @var \Drupal\apigee_edge_teams\Entity\Storage\TeamStorageInterface
+   */
+  protected $teamStorage;
+
+  /**
+   * Team entity to test.
+   *
+   * @var \Drupal\apigee_edge_teams\Entity\TeamInterface
+   */
+  protected $team;
+
+  /**
+   * Array of developers to test.
+   *
+   * @var \Drupal\apigee_edge\Entity\DeveloperInterface[]
+   */
+  protected $developers;
+
+  /**
+   * Drupal developer user account.
+   *
+   * @var \Drupal\Core\Session\AccountInterface
+   */
+  protected $account;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp(): void {
+    parent::setUp();
+
+    $this->developerStorage = $this->container->get('entity_type.manager')->getStorage('developer');
+    $this->teamStorage = $this->container->get('entity_type.manager')->getStorage('team');
+
+    for ($i = 0; $i < 2; $i++) {
+      $name = strtolower($this->randomMachineName());
+
+      // Developer.
+      $account = $this->createAccount(array_keys(\Drupal::service('user.permissions')->getPermissions()));
+      $this->account = new UserSession([
+        'uid' => $account->id(),
+        'uuid' => $account->id(),
+        'name' => $account->getAccountName(),
+        'roles' => $account->getRoles(),
+        'mail' => $account->getEmail(),
+      ]);
+      $this->developers[$i] = $account;
+    }
+
+    $this->team = $this->teamStorage->create([
+      'name' => $this->getRandomGenerator()->name(),
+      'attributes' => new AttributesProperty([
+        'name' => '__apigee_reserved__developer_details',
+        'value' => '[{\"developer\":\"doe@example.com\",\"roles\":[\"admin\"]}]'
+      ]),
+    ]);
+    $this->team->save();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function tearDown(): void {
+    foreach ($this->developers as $developer) {
+      try {
+        $this->developerStorage->delete([$developer]);
+      }
+      catch (\Exception $exception) {
+        $this->logException($exception);
+      }
+    }
+
+    if ($this->team !== NULL) {
+      try {
+        $this->teamStorage->delete([$this->team]);
+      }
+      catch (\Exception $exception) {
+        $this->logException($exception);
+      }
+    }
+
+    parent::tearDown();
+  }
+
+  /**
+   * Tests team membership manager service.
+   */
+  public function testTeamMembershipManager() {
+
+    $team_membership_manager = $this->container->get('apigee_edge_teams.team_membership_manager');
+    $team_membership_cache = $this->container->get('apigee_edge_teams.cache.appgroup_membership_object');
+
+    // Ensure that the appgroup's member list is empty.
+    foreach ($this->developers as $developer) {
+      $this->assertEmpty($team_membership_manager->getTeams($developer->getEmail(), $this->team->getName()));
+      $this->assertEmpty($team_membership_manager->getMembers($this->team->getName()));
+    }
+    // Ensure that team membership cache is empty.
+    $this->assertEmpty($team_membership_cache->getMembership($this->team->getName())->getMembers());
+
+    // Adding the team members.
+    foreach ($this->developers as $developer) {
+      /** @var \Drupal\apigee_edge_teams\Entity\TeamMemberRoleInterface $team_member_roles */
+      $team_member_role_storage = \Drupal::entityTypeManager()->getStorage('team_member_role');
+      $team_member_role_storage->addTeamRoles($developer, $this->team, ['member']);
+      $team_member_roles = $team_member_role_storage->loadByDeveloperAndTeam($developer, $this->team);
+      $team_member_roles->save();
+    }
+
+    // Add developers to the team and check whether the related membership
+    // service functions work properly.
+    $team_membership_manager->addMembers($this->team->getName(), [$this->developers[0]->getEmail() => ['admin'], $this->developers[1]->getEmail() => ['member']]);
+
+    foreach ($this->developers as $developer) {
+      $this->assertContains($this->team->getName(), $team_membership_manager->getTeams($developer->getEmail(), $this->team->getName()));
+      $this->assertContains($developer->getEmail(), $team_membership_manager->getMembers($this->team->getName()));
+
+      // Check whether the team membership is correctly cached.
+      $this->assertArrayHasKey($developer->getEmail(), $team_membership_cache->getMembership($this->team->getName())->getMembers());
+    }
+
+    // Remove developers from the team and check whether the related
+    // membership service functions work properly.
+    foreach ($this->developers as $developer) {
+      $team_membership_manager->removeMembers($this->team->getName(), [$developer->getEmail()]);
+      $this->assertNotContains($this->team->getName(), $team_membership_manager->getTeams($developer->getEmail(), $this->team->getName()));
+      $this->assertNotContains($developer->getEmail(), $team_membership_manager->getMembers($this->team->getName()));
+
+      // Check whether the team membership is correctly cached.
+      $this->assertArrayNotHasKey($developer->getEmail(), $team_membership_cache->getMembership($this->team->getName())->getMembers());
+    }
+
+    // Ensure that team membership cache is empty.
+    $this->assertEmpty($team_membership_cache->getMembership($this->team->getName())->getMembers());
+
+    // Add developer to appgroup then delete developer and check whether the
+    // developer is no longer member of the team.
+    $team_membership_manager->addMembers($this->team->getName(), [$this->developers[0]->getEmail() => ['admin'], $this->developers[1]->getEmail() => ['member']]);
+    $developer1 = $this->developerStorage->load($this->developers[0]->getEmail());
+    $developer1->delete([$this->developers[0]]);
+    $this->assertNotContains($this->developers[0]->getEmail(), $team_membership_manager->getMembers($this->team->getName()));
+    // Check whether the team membership is correctly cached.
+    $this->assertArrayNotHasKey($this->developers[0]->getEmail(), $team_membership_cache->getMembership($this->team->getName())->getMembers());
+
+    // Delete the team and ensure that the team is removed from the team
+    // membership cache.
+    $this->teamStorage->delete([$this->team]);
+  }
+
+}