diff --git src/bp-groups/bp-groups-notifications.php src/bp-groups/bp-groups-notifications.php
index ac9e8c4..327da19 100644
--- src/bp-groups/bp-groups-notifications.php
+++ src/bp-groups/bp-groups-notifications.php
@@ -967,6 +967,23 @@ add_action( 'groups_reject_invite', 'bp_groups_accept_invite_mark_notifications'
 add_action( 'groups_delete_invite', 'bp_groups_accept_invite_mark_notifications', 10, 2 );
 
 /**
+ * Mark notifications read when a member's group membership request is granted.
+ *
+ * @since 2.8.0
+ *
+ * @param int $user_id  ID of the user.
+ * @param int $group_id ID of the group.
+ */
+function bp_groups_accept_request_mark_notifications( $user_id, $group_id ) {
+	if ( bp_is_active( 'notifications' ) ) {
+		// First null parameter marks read for all admins.
+		bp_notifications_mark_notifications_by_item_id( null, $group_id, buddypress()->groups->id, 'new_membership_request', $user_id );
+	}
+}
+add_action( 'groups_membership_accepted', 'bp_groups_accept_request_mark_notifications', 10, 2 );
+add_action( 'groups_membership_rejected', 'bp_groups_accept_request_mark_notifications', 10, 2 );
+
+/**
  * Mark notifications read when a member views their group memberships.
  *
  * @since 1.9.0
diff --git tests/phpunit/testcases/groups/notifications.php tests/phpunit/testcases/groups/notifications.php
index 6600daa..103c1c1 100644
--- tests/phpunit/testcases/groups/notifications.php
+++ tests/phpunit/testcases/groups/notifications.php
@@ -218,4 +218,44 @@ class BP_Tests_Groups_Notifications extends BP_UnitTestCase {
 		$this->filter_fired = current_filter();
 		return $value;
 	}
+
+	/**
+	 * @group BP7375
+	 */
+	public function test_membership_request_notifications_should_be_cleared_when_request_is_accepted() {
+		$users = $this->factory->user->create_many( 3 );
+
+		$this->add_user_to_group( $users[0], $this->group, array(
+			'is_admin' => 1,
+		) );
+		$this->add_user_to_group( $users[1], $this->group, array(
+			'is_admin' => 1,
+		) );
+
+		groups_send_membership_request( $users[2], $this->group );
+
+		// Both admins should get a notification.
+		$get_args = array(
+			'user_id' => $users[0],
+			'item_id' => $this->group,
+			'secondary_item_id' => $users[2],
+			'component_action' => 'new_membership_request',
+			'is_new' => true,
+		);
+		$u0_notifications = BP_Notifications_Notification::get( $get_args );
+		$u1_notifications = BP_Notifications_Notification::get( $get_args );
+		$this->assertNotEmpty( $u0_notifications );
+		$this->assertNotEmpty( $u1_notifications );
+
+		$this->assertTrue( groups_invite_user( array(
+			'user_id' => $users[2],
+			'group_id' => $this->group,
+		) ) );
+
+		$u0_notifications = BP_Notifications_Notification::get( $get_args );
+		$u1_notifications = BP_Notifications_Notification::get( $get_args );
+		$this->assertEmpty( $u0_notifications );
+		$this->assertEmpty( $u1_notifications );
+	}
+
 }