diff --git a/src/transformer/get_event_function_map.php b/src/transformer/get_event_function_map.php
index 6ef9b2660..253613de7 100644
--- a/src/transformer/get_event_function_map.php
+++ b/src/transformer/get_event_function_map.php
@@ -56,6 +56,7 @@ function get_event_function_map() {
         '\core\event\course_module_completion_updated' => 'core\course_module_completion_updated',
         '\mod_assign\event\assessable_submitted' => 'mod_assign\assignment_submitted',
         '\mod_assign\event\submission_graded' => 'mod_assign\assignment_graded',
+        '\mod_assign\event\course_module_viewed' => 'all\course_module_viewed',
         '\mod_bigbluebuttonbn\event\activity_viewed' => 'mod_bigbluebuttonbn\activity_viewed',
         '\mod_bigbluebuttonbn\event\activity_management_viewed' => 'mod_bigbluebuttonbn\activity_management_viewed',
         '\mod_bigbluebuttonbn\event\live_session_event' => 'mod_bigbluebuttonbn\live_session',
diff --git a/tests/mod_assign/course_module_viewed/existing_module/data.json b/tests/mod_assign/course_module_viewed/existing_module/data.json
new file mode 100644
index 000000000..92a47ecc5
--- /dev/null
+++ b/tests/mod_assign/course_module_viewed/existing_module/data.json
@@ -0,0 +1,14 @@
+{
+  "modules": [
+    {
+      "id": 1,
+      "name": "assign"
+    }
+  ],
+  "assign": [
+    {
+      "id": 1,
+      "name": "test_name"
+    }
+  ]
+}
diff --git a/tests/mod_assign/course_module_viewed/existing_module/event.json b/tests/mod_assign/course_module_viewed/existing_module/event.json
new file mode 100644
index 000000000..b0dd18e3f
--- /dev/null
+++ b/tests/mod_assign/course_module_viewed/existing_module/event.json
@@ -0,0 +1,8 @@
+{
+  "id": 1,
+  "userid": 1,
+  "courseid": 1,
+  "timecreated": 1433946701,
+  "contextinstanceid": 1,
+  "eventname": "\\mod_assign\\event\\course_module_viewed"
+}
diff --git a/tests/mod_assign/course_module_viewed/existing_module/existing_module_test.php b/tests/mod_assign/course_module_viewed/existing_module/existing_module_test.php
new file mode 100644
index 000000000..f2deecc40
--- /dev/null
+++ b/tests/mod_assign/course_module_viewed/existing_module/existing_module_test.php
@@ -0,0 +1,70 @@
+<?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/>.
+
+namespace logstore_xapi\mod_assign\course_module_viewed\existing_module;
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+
+require_once($CFG->dirroot . '/admin/tool/log/store/xapi/tests/xapi_test_case.php');
+
+/**
+ * Unit test for mod_assign module viewed event.
+ *
+ * @package   logstore_xapi
+ * @copyright Milt Reder <milt@yetanalytics.com>
+ * @license   https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class existing_module_test extends \logstore_xapi\xapi_test_case {
+
+    /**
+     * Retrieve the directory of the unit test.
+     *
+     * @return string
+     */
+    protected function get_test_dir() {
+        return __DIR__;
+    }
+
+    /**
+     * Retrieve the plugin type being tested.
+     *
+     * @return string
+     */
+    protected function get_plugin_type() {
+        return "mod";
+    }
+
+    /**
+     * Retrieve the plugin name being tested.
+     *
+     * @return string
+     */
+    protected function get_plugin_name() {
+        return "assign";
+    }
+
+    /**
+     * Appease auto-detecting of test cases. xapi_test_case has default test cases.
+     *
+     * @covers ::course_module_viewed
+     * @return void
+     */
+    public function test_init() {
+
+    }
+}
diff --git a/tests/mod_assign/course_module_viewed/existing_module/statements.json b/tests/mod_assign/course_module_viewed/existing_module/statements.json
new file mode 100644
index 000000000..20ca6e6a9
--- /dev/null
+++ b/tests/mod_assign/course_module_viewed/existing_module/statements.json
@@ -0,0 +1,71 @@
+[
+  {
+    "actor": {
+      "name": "test_fullname",
+      "account": {
+        "homePage": "http://www.example.org",
+        "name": "1"
+      }
+    },
+    "verb": {
+      "id": "http://id.tincanapi.com/verb/viewed",
+      "display": {
+        "en": "viewed"
+      }
+    },
+    "object": {
+      "id": "http://www.example.org/mod/assign/view.php?id=1",
+      "definition": {
+        "type": "https://xapi.edlm/profiles/edlm-lms/concepts/activity-types/assignment",
+        "name": {
+          "en": "test_name"
+        }
+      }
+    },
+    "context": {
+      "language": "en",
+      "extensions": {
+        "http://lrs.learninglocker.net/define/extensions/info": {
+          "http://moodle.org": "1.0.0",
+          "https://github.com/xAPI-vle/moodle-logstore_xapi": "0.0.0-development",
+          "event_name": "\\mod_assign\\event\\course_module_viewed",
+          "event_function": "\\src\\transformer\\events\\all\\course_module_viewed"
+        }
+      },
+      "contextActivities": {
+        "parent": [
+          {
+            "id": "http://www.example.org/course/section.php?id=1",
+            "objectType": "Activity",
+            "definition": {
+              "name": {
+                "en": "test_name Section 0"
+              },
+              "type": "http://id.tincanapi.com/activitytype/section"
+            }
+          },
+          {
+            "id": "http://www.example.org/course/view.php?id=1",
+            "definition": {
+              "type": "https://w3id.org/xapi/cmi5/activitytype/course",
+              "name": {
+                "en": "test_name"
+              }
+            }
+          }
+        ],
+        "category": [
+          {
+            "id": "http://www.example.org",
+            "definition": {
+              "type": "http://id.tincanapi.com/activitytype/lms",
+              "name": {
+                "en": "test_name"
+              }
+            }
+          }
+        ]
+      }
+    }
+  }
+]