diff --git a/mod/assign/classes/privacy/assignsubmission_user_provider.php b/mod/assign/classes/privacy/assignsubmission_user_provider.php
new file mode 100644
index 00000000000..1a9331cd0e9
--- /dev/null
+++ b/mod/assign/classes/privacy/assignsubmission_user_provider.php
@@ -0,0 +1,54 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * This file contains the assignsubmission_user_provider interface.
+ *
+ * Assignment Sub plugins should implement this if they store personal information and can retrieve a userid.
+ *
+ * @package mod_assign
+ * @copyright 2018 Adrian Greeve <adrian@moodle.com>
+ *
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+namespace mod_assign\privacy;
+
+use core_privacy\local\request\userlist;
+
+defined('MOODLE_INTERNAL') || die();
+
+interface assignsubmission_user_provider extends \core_privacy\local\request\plugin\subplugin_provider {
+
+    /**
+     * If you have tables that contain userids and you can generate entries in your tables without creating an
+     * entry in the assign_submission table then please fill in this method.
+     *
+     * @param  userlist $userlist The userlist object
+     */
+    public static function get_userids_from_context(userlist $userlist);
+
+    /**
+     * Deletes all submissions for the submission ids / userids provided in a context.
+     * assign_plugin_request_data contains:
+     * - context
+     * - assign object
+     * - submission ids (pluginids)
+     * - user ids
+     * @param  assign_plugin_request_data $deletedata A class that contains the relevant information required for deletion.
+     */
+    public static function delete_submissions(assign_plugin_request_data $deletedata);
+
+}
\ No newline at end of file
diff --git a/mod/assign/submission/comments/classes/privacy/provider.php b/mod/assign/submission/comments/classes/privacy/provider.php
index 6f95fd2487d..bc7507bd003 100644
--- a/mod/assign/submission/comments/classes/privacy/provider.php
+++ b/mod/assign/submission/comments/classes/privacy/provider.php
@@ -41,7 +41,9 @@ use \mod_assign\privacy\assign_plugin_request_data;
  * @copyright  2018 Adrian Greeve <adrian@moodle.com>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class provider implements metadataprovider, \mod_assign\privacy\assignsubmission_provider {
+class provider implements metadataprovider,
+        \mod_assign\privacy\assignsubmission_provider,
+        \mod_assign\privacy\assignsubmission_user_provider {
 
     /**
      * Return meta data about this plugin.
@@ -89,6 +91,28 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
         $useridlist->add_from_sql($sql, $params);
     }
 
+    /**
+     * If you have tables that contain userids and you can generate entries in your tables without creating an
+     * entry in the assign_submission table then please fill in this method.
+     *
+     * @param  \core_privacy\local\request\userlist $userlist The userlist object
+     */
+    public static function get_userids_from_context(\core_privacy\local\request\userlist $userlist) {
+        $context = $userlist->get_context();
+        if ($context->contextlevel != CONTEXT_MODULE) {
+            return;
+        }
+        $sql = "SELECT userid
+                  FROM {comments}
+                 WHERE contextid = :contextid
+                   AND component = :component
+                   AND commentarea = :commentarea";
+        $userlist->add_from_sql('userid', $sql, [
+                'contextid' => $context->id,
+                'component' => 'assignsubmission_comments',
+                'commentarea' => 'submission_comments']);
+    }
+
     /**
      * Export all user data for this plugin.
      *
@@ -128,4 +152,20 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
             [$exportdata->get_context()->id]);
         comments_provider::delete_comments_for_user($contextlist, 'assignsubmission_comments', 'submission_comments');
     }
+
+    /**
+     * Deletes all submissions for the submission ids / userids provided in a context.
+     * assign_plugin_request_data contains:
+     * - context
+     * - assign object
+     * - submission ids (pluginids)
+     * - user ids
+     * @param  assign_plugin_request_data $deletedata A class that contains the relevant information required for deletion.
+     */
+    public static function delete_submissions(assign_plugin_request_data $deletedata) {
+        $userlist = new \core_privacy\local\request\approved_userlist($deletedata->get_context(), 'assignsubmission_comments',
+                $deletedata->get_userids());
+        comments_provider::delete_comments_for_users($userlist, 'assignsubmission_comments', 'submission_comments');
+    }
+
 }
diff --git a/mod/assign/submission/comments/tests/privacy_test.php b/mod/assign/submission/comments/tests/privacy_test.php
index e5917e66d35..c02e7959abf 100644
--- a/mod/assign/submission/comments/tests/privacy_test.php
+++ b/mod/assign/submission/comments/tests/privacy_test.php
@@ -134,6 +134,51 @@ class assignsubmission_comments_privacy_testcase extends \mod_assign\tests\mod_a
         $this->assertEquals($user1->id, $useridlist->get_userids()[0]->id);
     }
 
+    /**
+     * Test returning users related to a given context.
+     */
+    public function test_get_userids_from_context() {
+        // Get a bunch of users making comments.
+        // Some in one context some in another.
+        $this->resetAfterTest();
+        $course = $this->getDataGenerator()->create_course();
+        // Only in first context.
+        $user1 = $this->getDataGenerator()->create_user();
+        $user2 = $this->getDataGenerator()->create_user();
+        // First and second context.
+        $user3 = $this->getDataGenerator()->create_user();
+        // Second context only.
+        $user4 = $this->getDataGenerator()->create_user();
+        $this->getDataGenerator()->enrol_user($user1->id, $course->id, 'student');
+        $assign1 = $this->create_instance(['course' => $course]);
+        $assign2 = $this->create_instance(['course' => $course]);
+
+        $assigncontext1 = $assign1->get_context();
+        $assigncontext2 = $assign2->get_context();
+
+        $user1comment = 'Comment from user 1';
+        list($plugin, $submission, $comment) = $this->create_comment_submission($assign1, $user1, $user1comment);
+        $user2comment = 'From user 2';
+        $this->setUser($user2);
+        $comment->add($user2comment);
+        $user3comment = 'User 3 comment';
+        $this->setUser($user3);
+        $comment->add($user3comment);
+        $user4comment = 'Comment from user 4';
+        list($plugin, $submission, $comment) = $this->create_comment_submission($assign2, $user4, $user4comment);
+        $user3secondcomment = 'Comment on user 4 post.';
+        $this->setUser($user3);
+        $comment->add($user3comment);
+
+        $userlist = new \core_privacy\local\request\userlist($assigncontext1, 'assignsubmission_comments');
+        \assignsubmission_comments\privacy\provider::get_userids_from_context($userlist);
+        $userids = $userlist->get_userids();
+        $this->assertCount(3, $userids);
+        // Two is the key for user 3.
+        $this->assertEquals(2, array_search($user3->id, $userids));
+        $this->assertFalse(array_search($user4->id, $userids));
+    }
+
     /**
      * Test that comments are exported for a user.
      */
@@ -259,4 +304,55 @@ class assignsubmission_comments_privacy_testcase extends \mod_assign\tests\mod_a
             $this->assertNotEquals($user1->id, $result->userid);
         }
     }
+
+    /**
+     * Test deletion of all submissions for a context works.
+     */
+    public function test_delete_submissions() {
+        global $DB;
+        // Get a bunch of users making comments.
+        // Some in one context some in another.
+        $this->resetAfterTest();
+        $course = $this->getDataGenerator()->create_course();
+        // Only in first context.
+        $user1 = $this->getDataGenerator()->create_user();
+        $user2 = $this->getDataGenerator()->create_user();
+        // First and second context.
+        $user3 = $this->getDataGenerator()->create_user();
+        // Second context only.
+        $user4 = $this->getDataGenerator()->create_user();
+        $this->getDataGenerator()->enrol_user($user1->id, $course->id, 'student');
+        $assign1 = $this->create_instance(['course' => $course]);
+        $assign2 = $this->create_instance(['course' => $course]);
+
+        $assigncontext1 = $assign1->get_context();
+        $assigncontext2 = $assign2->get_context();
+
+        $user1comment = 'Comment from user 1';
+        list($plugin, $submission, $comment) = $this->create_comment_submission($assign1, $user1, $user1comment);
+        $user2comment = 'From user 2';
+        $this->setUser($user2);
+        $comment->add($user2comment);
+        $user3comment = 'User 3 comment';
+        $this->setUser($user3);
+        $comment->add($user3comment);
+        $user4comment = 'Comment from user 4';
+        list($plugin, $submission, $comment) = $this->create_comment_submission($assign2, $user4, $user4comment);
+        $user3secondcomment = 'Comment on user 4 post.';
+        $this->setUser($user3);
+        $comment->add($user3comment);
+
+        // There should be three entries. One for the first three users.
+        $results = $DB->get_records('comments', ['contextid' => $assigncontext1->id]);
+        $this->assertCount(3, $results);
+
+        $deletedata = new \mod_assign\privacy\assign_plugin_request_data($assigncontext1, $assign1);
+        $deletedata->set_userids([$user1->id, $user3->id]);
+        \assignsubmission_comments\privacy\provider::delete_submissions($deletedata);
+
+        // We should be left with just a comment from user 2.
+        $results = $DB->get_records('comments', ['contextid' => $assigncontext1->id]);
+        $this->assertCount(1, $results);
+        $this->assertEquals($user2comment, current($results)->content);
+    }
 }
diff --git a/mod/assign/submission/file/classes/privacy/provider.php b/mod/assign/submission/file/classes/privacy/provider.php
index a10e67a281b..f02f6dc70ab 100644
--- a/mod/assign/submission/file/classes/privacy/provider.php
+++ b/mod/assign/submission/file/classes/privacy/provider.php
@@ -29,7 +29,6 @@ defined('MOODLE_INTERNAL') || die();
 require_once($CFG->dirroot . '/mod/assign/locallib.php');
 
 use \core_privacy\local\metadata\collection;
-use \core_privacy\local\metadata\provider as metadataprovider;
 use \core_privacy\local\request\writer;
 use \core_privacy\local\request\contextlist;
 use \mod_assign\privacy\assign_plugin_request_data;
@@ -41,7 +40,10 @@ use \mod_assign\privacy\assign_plugin_request_data;
  * @copyright  2018 Adrian Greeve <adrian@moodle.com>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class provider implements metadataprovider, \mod_assign\privacy\assignsubmission_provider {
+class provider implements
+        \core_privacy\local\metadata\provider,
+        \mod_assign\privacy\assignsubmission_provider,
+        \mod_assign\privacy\assignsubmission_user_provider {
 
     /**
      * Return meta data about this plugin.
@@ -73,6 +75,16 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
         // No need.
     }
 
+    /**
+     * If you have tables that contain userids and you can generate entries in your tables without creating an
+     * entry in the assign_submission table then please fill in this method.
+     *
+     * @param  userlist $userlist The userlist object
+     */
+    public static function get_userids_from_context(\core_privacy\local\request\userlist $userlist) {
+        // Not required.
+    }
+
     /**
      * Export all user data for this plugin.
      *
@@ -122,7 +134,7 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
     }
 
     /**
-     * A call to this method should delete user data (where practicle) using the userid and submission.
+     * A call to this method should delete user data (where practical) using the userid and submission.
      *
      * @param  assign_plugin_request_data $deletedata Details about the user and context to focus the deletion.
      */
@@ -137,7 +149,32 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
         $fs->delete_area_files($deletedata->get_context()->id, 'assignsubmission_file', ASSIGNSUBMISSION_FILE_FILEAREA,
                 $submissionid);
 
-        $DB->delete_records('assignsubmission_file', ['assignment' => $deletedata->get_assign()->get_instance()->id,
-                'submission' => $submissionid]);
+        $DB->delete_records('assignsubmission_file', ['assignment' => $deletedata->get_assignid(), 'submission' => $submissionid]);
+    }
+
+    /**
+     * Deletes all submissions for the submission ids / userids provided in a context.
+     * assign_plugin_request_data contains:
+     * - context
+     * - assign object
+     * - submission ids (pluginids)
+     * - user ids
+     * @param  assign_plugin_request_data $deletedata A class that contains the relevant information required for deletion.
+     */
+    public static function delete_submissions(assign_plugin_request_data $deletedata) {
+        global $DB;
+
+        \core_plagiarism\privacy\provider::delete_plagiarism_for_users($deletedata->get_userids(), $deletedata->get_context());
+
+        if (empty($deletedata->get_submissionids())) {
+            return;
+        }
+        $fs = get_file_storage();
+        list($sql, $params) = $DB->get_in_or_equal($deletedata->get_submissionids(), SQL_PARAMS_NAMED);
+        $fs->delete_area_files_select($deletedata->get_context()->id, 'assignsubmission_file', ASSIGNSUBMISSION_FILE_FILEAREA,
+                $sql, $params);
+
+        $params['assignid'] = $deletedata->get_assignid();
+        $DB->delete_records_select('assignsubmission_file', "assignment = :assignid AND submission $sql", $params);
     }
 }
diff --git a/mod/assign/submission/file/tests/privacy_test.php b/mod/assign/submission/file/tests/privacy_test.php
index 61f68412ad7..99dda2620f9 100644
--- a/mod/assign/submission/file/tests/privacy_test.php
+++ b/mod/assign/submission/file/tests/privacy_test.php
@@ -172,4 +172,77 @@ class assignsubmission_file_privacy_testcase extends \mod_assign\tests\mod_assig
         // There should be files here.
         $this->assertFalse($plugin2->is_empty($submission2));
     }
+
+    /**
+     * Test deletion of bulk submissions for a context.
+     */
+    public function test_delete_submissions() {
+        global $DB;
+
+        $this->resetAfterTest();
+        // Create course, assignment, submission, and then a feedback comment.
+        $course = $this->getDataGenerator()->create_course();
+        // Student.
+        $user1 = $this->getDataGenerator()->create_user();
+        $user2 = $this->getDataGenerator()->create_user();
+        $user3 = $this->getDataGenerator()->create_user();
+        $user4 = $this->getDataGenerator()->create_user();
+
+        $this->getDataGenerator()->enrol_user($user1->id, $course->id, 'student');
+        $this->getDataGenerator()->enrol_user($user2->id, $course->id, 'student');
+        $this->getDataGenerator()->enrol_user($user3->id, $course->id, 'student');
+        $this->getDataGenerator()->enrol_user($user4->id, $course->id, 'student');
+
+        $assign1 = $this->create_instance(['course' => $course]);
+        $assign2 = $this->create_instance(['course' => $course]);
+
+        $context1 = $assign1->get_context();
+        $context2 = $assign2->get_context();
+
+        $student1filename = 'user1file.pdf';
+        list($plugin1, $submission1) = $this->create_file_submission($assign1, $user1, $student1filename);
+        $student2filename = 'user2file.pdf';
+        list($plugin2, $submission2) = $this->create_file_submission($assign1, $user2, $student2filename);
+        $student3filename = 'user3file.pdf';
+        list($plugin3, $submission3) = $this->create_file_submission($assign1, $user3, $student3filename);
+        $student4filename = 'user4file.pdf';
+        list($plugin4, $submission4) = $this->create_file_submission($assign2, $user4, $student4filename);
+        $student5filename = 'user5file.pdf';
+        list($plugin5, $submission5) = $this->create_file_submission($assign2, $user3, $student5filename);
+
+        $submissionids = [
+            $submission1->id,
+            $submission3->id
+        ];
+
+        $userids = [
+            $user1->id,
+            $user3->id
+        ];
+
+        $data = $DB->get_records('files', ['contextid' => $context1->id, 'component' => 'assignsubmission_file']);
+        $this->assertCount(6, $data);
+
+        $data = $DB->get_records('assignsubmission_file', ['assignment' => $assign1->get_instance()->id]);
+        $this->assertCount(3, $data);
+
+        // Records in the second assignment (not being touched).
+        $data = $DB->get_records('assignsubmission_file', ['assignment' => $assign2->get_instance()->id]);
+        $this->assertCount(2, $data);
+
+        $deletedata = new \mod_assign\privacy\assign_plugin_request_data($context1, $assign1);
+        $deletedata->set_userids($userids);
+        $deletedata->populate_submissions_and_grades();
+        \assignsubmission_file\privacy\provider::delete_submissions($deletedata);
+        $data = $DB->get_records('files', ['contextid' => $context1->id, 'component' => 'assignsubmission_file']);
+        $this->assertCount(2, $data);
+
+        // Submission 1 and 3 have been removed. We should be left with submission2.
+        $data = $DB->get_records('assignsubmission_file', ['assignment' => $assign1->get_instance()->id]);
+        $this->assertCount(1, $data);
+
+        // This should be untouched.
+        $data = $DB->get_records('assignsubmission_file', ['assignment' => $assign2->get_instance()->id]);
+        $this->assertCount(2, $data);
+    }
 }
diff --git a/mod/assign/submission/onlinetext/classes/privacy/provider.php b/mod/assign/submission/onlinetext/classes/privacy/provider.php
index fc5e2746312..fa660b9769a 100644
--- a/mod/assign/submission/onlinetext/classes/privacy/provider.php
+++ b/mod/assign/submission/onlinetext/classes/privacy/provider.php
@@ -29,7 +29,6 @@ defined('MOODLE_INTERNAL') || die();
 require_once($CFG->dirroot . '/mod/assign/locallib.php');
 
 use \core_privacy\local\metadata\collection;
-use \core_privacy\local\metadata\provider as metadataprovider;
 use \core_privacy\local\request\writer;
 use \core_privacy\local\request\contextlist;
 use \mod_assign\privacy\assign_plugin_request_data;
@@ -41,7 +40,10 @@ use \mod_assign\privacy\assign_plugin_request_data;
  * @copyright  2018 Adrian Greeve <adrian@moodle.com>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class provider implements metadataprovider, \mod_assign\privacy\assignsubmission_provider {
+class provider implements
+        \core_privacy\local\metadata\provider,
+        \mod_assign\privacy\assignsubmission_provider,
+        \mod_assign\privacy\assignsubmission_user_provider {
 
     /**
      * Return meta data about this plugin.
@@ -79,6 +81,16 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
         // No need.
     }
 
+    /**
+     * If you have tables that contain userids and you can generate entries in your tables without creating an
+     * entry in the assign_submission table then please fill in this method.
+     *
+     * @param  \core_privacy\local\request\userlist $userlist The userlist object
+     */
+    public static function get_userids_from_context(\core_privacy\local\request\userlist $userlist) {
+        // Not required.
+    }
+
     /**
      * Export all user data for this plugin.
      *
@@ -136,7 +148,7 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
                 ASSIGNSUBMISSION_ONLINETEXT_FILEAREA);
 
         // Delete the records in the table.
-        $DB->delete_records('assignsubmission_onlinetext', ['assignment' => $requestdata->get_assign()->get_instance()->id]);
+        $DB->delete_records('assignsubmission_onlinetext', ['assignment' => $requestdata->get_assignid()]);
     }
 
     /**
@@ -157,7 +169,33 @@ class provider implements metadataprovider, \mod_assign\privacy\assignsubmission
                 $submissionid);
 
         // Delete the records in the table.
-        $DB->delete_records('assignsubmission_onlinetext', ['assignment' => $deletedata->get_assign()->get_instance()->id,
+        $DB->delete_records('assignsubmission_onlinetext', ['assignment' => $deletedata->get_assignid(),
                 'submission' => $submissionid]);
     }
+
+    /**
+     * Deletes all submissions for the submission ids / userids provided in a context.
+     * assign_plugin_request_data contains:
+     * - context
+     * - assign object
+     * - submission ids (pluginids)
+     * - user ids
+     * @param  assign_plugin_request_data $deletedata A class that contains the relevant information required for deletion.
+     */
+    public static function delete_submissions(assign_plugin_request_data $deletedata) {
+        global $DB;
+
+        \core_plagiarism\privacy\provider::delete_plagiarism_for_users($deletedata->get_userids(), $deletedata->get_context());
+        if (empty($deletedata->get_submissionids())) {
+            return;
+        }
+
+        $fs = get_file_storage();
+        list($sql, $params) = $DB->get_in_or_equal($deletedata->get_submissionids(), SQL_PARAMS_NAMED);
+        $fs->delete_area_files_select($deletedata->get_context()->id,
+                'assignsubmission_onlinetext', ASSIGNSUBMISSION_ONLINETEXT_FILEAREA, $sql, $params);
+
+        $params['assignid'] = $deletedata->get_assignid();
+        $DB->delete_records_select('assignsubmission_onlinetext', "assignment = :assignid AND submission $sql", $params);
+    }
 }
diff --git a/mod/assign/submission/onlinetext/tests/privacy_test.php b/mod/assign/submission/onlinetext/tests/privacy_test.php
index ce1dd5062ad..ed7342c307a 100644
--- a/mod/assign/submission/onlinetext/tests/privacy_test.php
+++ b/mod/assign/submission/onlinetext/tests/privacy_test.php
@@ -67,7 +67,7 @@ class assignsubmission_online_privacy_testcase extends \mod_assign\tests\mod_ass
      * Quick test to make sure that get_metadata returns something.
      */
     public function test_get_metadata() {
-        $collection = new \core_privacy\local\metadata\collection('assignsubmission_file');
+        $collection = new \core_privacy\local\metadata\collection('assignsubmission_onlinetext');
         $collection = \assignsubmission_onlinetext\privacy\provider::get_metadata($collection);
         $this->assertNotEmpty($collection);
     }
@@ -161,4 +161,56 @@ class assignsubmission_online_privacy_testcase extends \mod_assign\tests\mod_ass
         // But there is for the second submission.
         $this->assertFalse($plugin2->is_empty($submission2));
     }
+
+    public function test_delete_submissions() {
+        global $DB;
+
+        $this->resetAfterTest();
+
+        $course = $this->getDataGenerator()->create_course();
+        $user1 = $this->getDataGenerator()->create_user();
+        $user2 = $this->getDataGenerator()->create_user();
+        $user3 = $this->getDataGenerator()->create_user();
+        // Only makes submissions in the second assignment.
+        $user4 = $this->getDataGenerator()->create_user();
+
+        $this->getDataGenerator()->enrol_user($user1->id, $course->id, 'student');
+        $this->getDataGenerator()->enrol_user($user2->id, $course->id, 'student');
+        $this->getDataGenerator()->enrol_user($user3->id, $course->id, 'student');
+        $this->getDataGenerator()->enrol_user($user4->id, $course->id, 'student');
+
+        $assign1 = $this->create_instance(['course' => $course]);
+        $assign2 = $this->create_instance(['course' => $course]);
+
+        $context1 = $assign1->get_context();
+        $context2 = $assign2->get_context();
+
+        $student1text = 'Student one\'s text.';
+        list($plugin1, $submission1) = $this->create_online_submission($assign1, $user1, $student1text);
+        $student2text = 'Student two\'s text.';
+        list($plugin2, $submission2) = $this->create_online_submission($assign1, $user2, $student2text);
+        $student3text = 'Student two\'s text.';
+        list($plugin3, $submission3) = $this->create_online_submission($assign1, $user3, $student3text);
+        // Now for submissions in assignment two.
+        $student3text2 = 'Student two\'s text for the second assignment.';
+        list($plugin4, $submission4) = $this->create_online_submission($assign2, $user3, $student3text2);
+        $student4text = 'Student four\'s text.';
+        list($plugin5, $submission5) = $this->create_online_submission($assign2, $user4, $student4text);
+
+        $data = $DB->get_records('assignsubmission_onlinetext', ['assignment' => $assign1->get_instance()->id]);
+        $this->assertCount(3, $data);
+        // Delete the submissions for user 1 and 3.
+        $requestdata = new \mod_assign\privacy\assign_plugin_request_data($context1, $assign1);
+        $requestdata->set_userids([$user1->id, $user2->id]);
+        $requestdata->populate_submissions_and_grades();
+        \assignsubmission_onlinetext\privacy\provider::delete_submissions($requestdata);
+
+        // There should only be one record left for assignment one.
+        $data = $DB->get_records('assignsubmission_onlinetext', ['assignment' => $assign1->get_instance()->id]);
+        $this->assertCount(1, $data);
+
+        // Check that the second assignment has not been touched.
+        $data = $DB->get_records('assignsubmission_onlinetext', ['assignment' => $assign2->get_instance()->id]);
+        $this->assertCount(2, $data);
+    }
 }