diff --git a/lib/emitter/docs/examples/AssignmentGraded.json b/lib/emitter/docs/examples/AssignmentGraded.json
index 1a82e093245a4c821a8db4c7a02842aece25d730..cc00d0fb86f0678dc9a12a30fe1ab40182743dcd 100644
--- a/lib/emitter/docs/examples/AssignmentGraded.json
+++ b/lib/emitter/docs/examples/AssignmentGraded.json
@@ -84,7 +84,7 @@
     "verb": {
         "id": "http:\/\/adlnet.gov\/expapi\/verbs\/scored",
         "display": {
-            "en": "recieved grade for"
+            "en": "received grade for"
         }
     },
     "result": {
diff --git a/lib/emitter/src/Events/AssignmentGraded.php b/lib/emitter/src/Events/AssignmentGraded.php
index 37afef1a8dd01d0e2ab002c7ed357ef3d5aa7e1d..7f62545a5f76b58df5ae38c6bed2b0730cf22cac 100644
--- a/lib/emitter/src/Events/AssignmentGraded.php
+++ b/lib/emitter/src/Events/AssignmentGraded.php
@@ -1,8 +1,8 @@
 <?php namespace XREmitter\Events;
 
 class AssignmentGraded extends Event {
-    protected static $verb_display = [
-        'en' => 'recieved grade for'
+    protected static $verbDisplay = [
+        'en' => 'received grade for'
     ];
 
     /**
diff --git a/lib/emitter/src/Events/AssignmentSubmitted.php b/lib/emitter/src/Events/AssignmentSubmitted.php
index bca3fbae9b4ef533a34a8d8e81c96b048b45887d..3c3bff7e5f4cc67a71fb0f2999160fdaed47bf3f 100644
--- a/lib/emitter/src/Events/AssignmentSubmitted.php
+++ b/lib/emitter/src/Events/AssignmentSubmitted.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class AssignmentSubmitted extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'completed'
     ];
 
diff --git a/lib/emitter/src/Events/AttemptCompleted.php b/lib/emitter/src/Events/AttemptCompleted.php
index ad7e4cfbf1dc00aebb07cf6e5d55720b17f5c515..4fc9efb9539d3fc46dfd5ce96ce42c781068ab9d 100644
--- a/lib/emitter/src/Events/AttemptCompleted.php
+++ b/lib/emitter/src/Events/AttemptCompleted.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class AttemptCompleted extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'completed'
     ];
 
diff --git a/lib/emitter/src/Events/AttemptStarted.php b/lib/emitter/src/Events/AttemptStarted.php
index 9a326599311fd1ab7726e5ff8eb33aef29712bd6..6c1d5ca23d82bf8ee9448137d2b6f365401a2daf 100644
--- a/lib/emitter/src/Events/AttemptStarted.php
+++ b/lib/emitter/src/Events/AttemptStarted.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class AttemptStarted extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'started'
     ];
 
diff --git a/lib/emitter/src/Events/Attended.php b/lib/emitter/src/Events/Attended.php
index 99beff8ee8f8592f1503efaaf57e54add5a6da22..1b524c1b4edc5db51c9c56dfe96884fb5b795e05 100755
--- a/lib/emitter/src/Events/Attended.php
+++ b/lib/emitter/src/Events/Attended.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class Attended extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'attended'
     ];
 
diff --git a/lib/emitter/src/Events/CourseCompleted.php b/lib/emitter/src/Events/CourseCompleted.php
index 8abc0b829246a1f6c8dc0f44e380791b83ba66fe..456a7a7bf7a8240699fb9716682306fac873670e 100644
--- a/lib/emitter/src/Events/CourseCompleted.php
+++ b/lib/emitter/src/Events/CourseCompleted.php
@@ -19,7 +19,7 @@ class CourseCompleted extends Event
      * Sets the language equivalent for completed. 
      * @var array
      */
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'completed'
     ];
     /**
diff --git a/lib/emitter/src/Events/EnrolmentCreated.php b/lib/emitter/src/Events/EnrolmentCreated.php
index 1f2213fc0bf2d16bfdd62af957730ad7485ba1eb..5382deaee653cfeb50ae831aaa8ff37a969e5d99 100644
--- a/lib/emitter/src/Events/EnrolmentCreated.php
+++ b/lib/emitter/src/Events/EnrolmentCreated.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class EnrolmentCreated extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'enrolled onto'
     ];
 
diff --git a/lib/emitter/src/Events/Event.php b/lib/emitter/src/Events/Event.php
index 9b323cf0a10a4351150bca95a6e7f40a0be280f8..f3c78acb367026baeffd8fcd84b200c6b69f8a7d 100644
--- a/lib/emitter/src/Events/Event.php
+++ b/lib/emitter/src/Events/Event.php
@@ -2,7 +2,7 @@
 use \stdClass as PhpObj;
 
 abstract class Event extends PhpObj {
-    protected static $verb_display;
+    protected static $verbDisplay;
 
     /**
      * Reads data for an event.
@@ -130,8 +130,8 @@ abstract class Event extends PhpObj {
 
     protected function readVerbDisplay($opts) {
         $lang = $opts['context_lang'];
-        $lang = isset(static::$verb_display[$lang]) ? $lang : array_keys(static::$verb_display)[0];
-        return [$lang => static::$verb_display[$lang]];
+        $lang = isset(static::$verbDisplay[$lang]) ? $lang : array_keys(static::$verbDisplay)[0];
+        return [$lang => static::$verbDisplay[$lang]];
     }
 
 }
diff --git a/lib/emitter/src/Events/EventEnrol.php b/lib/emitter/src/Events/EventEnrol.php
index ab0230ff6c423894a53752d482aa5a45c067ddda..949f2d5b142372e0664e7d7b6b7a5f57c7cf60b4 100755
--- a/lib/emitter/src/Events/EventEnrol.php
+++ b/lib/emitter/src/Events/EventEnrol.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class EventEnrol extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'registered for'
     ];
 
diff --git a/lib/emitter/src/Events/EventUnenrol.php b/lib/emitter/src/Events/EventUnenrol.php
index 9a00e46120a6c7d31ea47969e966aafe701b111b..a4e63935da49ac9e94717e556025926c252d6b4d 100755
--- a/lib/emitter/src/Events/EventUnenrol.php
+++ b/lib/emitter/src/Events/EventUnenrol.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class EventUnenrol extends EventEnrol {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'unregistered from'
     ];
 
diff --git a/lib/emitter/src/Events/QuestionAnswered.php b/lib/emitter/src/Events/QuestionAnswered.php
index f757fa87266e1a5cc0364c0c05f7e754941a7ea7..cffed7ae5eef417937746c9ec57bef1804605618 100644
--- a/lib/emitter/src/Events/QuestionAnswered.php
+++ b/lib/emitter/src/Events/QuestionAnswered.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class QuestionAnswered extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'answered'
     ];
 
diff --git a/lib/emitter/src/Events/ScormEvent.php b/lib/emitter/src/Events/ScormEvent.php
index 0f59da326fcf3a21c1d60d55b17d5884d1283d81..2181f755cb84cb2d3ebfde6705098aa3ae7e3ae6 100644
--- a/lib/emitter/src/Events/ScormEvent.php
+++ b/lib/emitter/src/Events/ScormEvent.php
@@ -40,7 +40,7 @@ class ScormEvent extends Event {
                 $verb = 'completed';
         }
 
-        static::$verb_display = ['en' => $verb];
+        static::$verbDisplay = ['en' => $verb];
 
         $lang = [
             'id' => $verbUrl,
diff --git a/lib/emitter/src/Events/ScormLaunched.php b/lib/emitter/src/Events/ScormLaunched.php
index dc2e4526ca2478601a825e2d3ba96a6f4c1332fb..a43d584a8bd0dbbd09354e1d9cfa5b1aaf971d4f 100644
--- a/lib/emitter/src/Events/ScormLaunched.php
+++ b/lib/emitter/src/Events/ScormLaunched.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class ScormLaunched extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'launched'
     ];
 
diff --git a/lib/emitter/src/Events/ScormScoreRawSubmitted.php b/lib/emitter/src/Events/ScormScoreRawSubmitted.php
index 7285a78a7d8aded3628b8f84361d646b3533a22e..e32142de2461070ee44c1be86db0f77c6bd2e4e1 100644
--- a/lib/emitter/src/Events/ScormScoreRawSubmitted.php
+++ b/lib/emitter/src/Events/ScormScoreRawSubmitted.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class ScormScoreRawSubmitted extends ScormEvent {
-    protected static $verb_display;
+    protected static $verbDisplay;
 
     /**
      * Reads data for an event.
diff --git a/lib/emitter/src/Events/ScormStatusSubmitted.php b/lib/emitter/src/Events/ScormStatusSubmitted.php
index 9ecab95ee00831fd103c2cef603894bf703f7d0a..9837023c69aa2463e76a5b54333ce977eda5a983 100644
--- a/lib/emitter/src/Events/ScormStatusSubmitted.php
+++ b/lib/emitter/src/Events/ScormStatusSubmitted.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class ScormStatusSubmitted extends ScormEvent {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'completed'
     ];
 
diff --git a/lib/emitter/src/Events/UserLoggedin.php b/lib/emitter/src/Events/UserLoggedin.php
index 70f8e87a0b283027397ff4fa0a8b882d0941a8b7..e6bf20daf1d421c4e50f62e217aaffba7ff9422c 100644
--- a/lib/emitter/src/Events/UserLoggedin.php
+++ b/lib/emitter/src/Events/UserLoggedin.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class UserLoggedin extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'logged in to'
     ];
 
diff --git a/lib/emitter/src/Events/UserLoggedout.php b/lib/emitter/src/Events/UserLoggedout.php
index c6616950d1789f710d13b63448ea1f7bc3b1a796..33f6aaf76a41c77b738684956007a8e88a70656e 100644
--- a/lib/emitter/src/Events/UserLoggedout.php
+++ b/lib/emitter/src/Events/UserLoggedout.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class UserLoggedout extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'logged out of'
     ];
 
diff --git a/lib/emitter/src/Events/UserRegistered.php b/lib/emitter/src/Events/UserRegistered.php
index f756484f1213ef52cdaf0aeb2043dcb6c37037ad..0b43d260873b5b0b5893b156f153b06c7e32c55e 100644
--- a/lib/emitter/src/Events/UserRegistered.php
+++ b/lib/emitter/src/Events/UserRegistered.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 class UserRegistered extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'registered to'
     ];
 
diff --git a/lib/emitter/src/Events/Viewed.php b/lib/emitter/src/Events/Viewed.php
index be1976f4096e99c84a52f677a3c8c61db2e83132..9e218d44bb53620c7b1d8428b6595b36e8d170c1 100644
--- a/lib/emitter/src/Events/Viewed.php
+++ b/lib/emitter/src/Events/Viewed.php
@@ -1,7 +1,7 @@
 <?php namespace XREmitter\Events;
 
 abstract class Viewed extends Event {
-    protected static $verb_display = [
+    protected static $verbDisplay = [
         'en' => 'viewed'
     ];
 
diff --git a/lib/emitter/tests/AssignmentGradedTest.php b/lib/emitter/tests/AssignmentGradedTest.php
index 78881606692ec49743c85dca55dc36b456859eeb..2456c152b653801eee606f69f90135b16c2b78da 100644
--- a/lib/emitter/tests/AssignmentGradedTest.php
+++ b/lib/emitter/tests/AssignmentGradedTest.php
@@ -40,7 +40,7 @@ class AssignmentGradedTest extends EventTest {
             $output['context']['extensions']['http://lrs.learninglocker.net/define/extensions/info']
         );
         $this->assertValidXapiStatement($output);
-        $this->assertVerb('http://adlnet.gov/expapi/verbs/scored', 'recieved grade for', $output['verb']);
+        $this->assertVerb('http://adlnet.gov/expapi/verbs/scored', 'received grade for', $output['verb']);
         $this->assertObject('module', $input, $output['object']);
         $this->assertObject('course', $input, $output['context']['contextActivities']['parent'][0]);
         $this->assertEquals($input['grade_score_raw'], $output['result']['score']['raw']);
diff --git a/lib/emitter/tests/EventTest.php b/lib/emitter/tests/EventTest.php
index dffb7c8cb39c553ce490942e33f6f4100a462b7f..ba74959f171855d995a6c94b6142a9bcd0c35801 100644
--- a/lib/emitter/tests/EventTest.php
+++ b/lib/emitter/tests/EventTest.php
@@ -170,8 +170,8 @@ abstract class EventTest extends PhpUnitTestCase {
         $this->assertEquals($input[$type.'_description'], $output['definition']['description'][$input['context_lang']]);
     }
 
-    protected function assertVerb($verb_id, $verb_name, $output) {
-        $this->assertEquals($verb_id, $output['id']);
+    protected function assertVerb($verbId, $verb_name, $output) {
+        $this->assertEquals($verbId, $output['id']);
         $this->assertEquals($verb_name, $output['display']['en']);
     }
 
@@ -199,9 +199,9 @@ abstract class EventTest extends PhpUnitTestCase {
     }
 
     protected function createExampleFile($output) {
-        $class_array = explode('\\', get_class($this));
-        $event_name = str_replace('Test', '', array_pop($class_array));
-        $example_file = __DIR__.'/../docs/examples/'.$event_name.'.json';
-        file_put_contents($example_file, json_encode($output, JSON_PRETTY_PRINT));
+        $classArray = explode('\\', get_class($this));
+        $eventName = str_replace('Test', '', array_pop($classArray));
+        $exampleFile = __DIR__.'/../docs/examples/'.$eventName.'.json';
+        file_put_contents($exampleFile, json_encode($output, JSON_PRETTY_PRINT));
     }
 }
diff --git a/lib/expander/docs/examples/FeedbackSubitted.json b/lib/expander/docs/examples/FeedbackSubitted.json
index dced4766b22a47de72e2b841efd5020572bb345b..6944c74ee1e88afbd85bcee2475b6c3ca16497a4 100644
--- a/lib/expander/docs/examples/FeedbackSubitted.json
+++ b/lib/expander/docs/examples/FeedbackSubitted.json
@@ -116,6 +116,6 @@
                 "type": "object"
             }
         },
-        "timemodified": 1497207558
+        "timemodified": 1497208516
     }
 }
\ No newline at end of file
diff --git a/lib/expander/src/Events/AssignmentGraded.php b/lib/expander/src/Events/AssignmentGraded.php
index c1c8d0ff1d6435ee515580754c1b2ba04be84c96..5ad816cb0c8205e401ce598c5f4a6a024b3bb326 100644
--- a/lib/expander/src/Events/AssignmentGraded.php
+++ b/lib/expander/src/Events/AssignmentGraded.php
@@ -9,12 +9,12 @@ class AssignmentGraded extends Event {
      */
     public function read(array $opts) {
         $grade = $this->repo->readObject($opts['objectid'], $opts['objecttable']);
-        $grade_comment = $this->repo->readGradeComment($grade->id, $grade->assignment)->commenttext;
-        $grade_items = $this->repo->readGradeItems($grade->assignment, 'assign');
+        $gradeComment = $this->repo->readGradeComment($grade->id, $grade->assignment)->commenttext;
+        $gradeItems = $this->repo->readGradeItems($grade->assignment, 'assign');
         return array_merge(parent::read($opts), [
             'grade' => $grade,
-            'grade_comment' => $grade_comment,
-            'grade_items' => $grade_items,
+            'grade_comment' => $gradeComment,
+            'grade_items' => $gradeItems,
             'graded_user' => $this->repo->readUser($grade->userid),
             'module' => $this->repo->readModule($grade->assignment, 'assign'),
         ]);
diff --git a/lib/expander/src/Events/AttemptEvent.php b/lib/expander/src/Events/AttemptEvent.php
index 62085512f5cb30eead9e3485e269b39cff677100..9946d487947c7dc7d413d2f568467f01418fd0aa 100644
--- a/lib/expander/src/Events/AttemptEvent.php
+++ b/lib/expander/src/Events/AttemptEvent.php
@@ -9,14 +9,14 @@ class AttemptEvent extends Event {
      */
     public function read(array $opts) {
         $attempt = $this->repo->readAttempt($opts['objectid']);
-        $grade_items = $this->repo->readGradeItems($attempt->quiz, 'quiz');
+        $gradeItems = $this->repo->readGradeItems($attempt->quiz, 'quiz');
         $attempt->questions = $this->repo->readQuestionAttempts($attempt->id);
         $questions = $this->repo->readQuestions($attempt->quiz);
 
         return array_merge(parent::read($opts), [
             'attempt' => $attempt,
             'module' => $this->repo->readModule($attempt->quiz, 'quiz'),
-            'grade_items' => $grade_items,
+            'grade_items' => $gradeItems,
             'questions' => $questions
         ]);
     }
diff --git a/lib/expander/src/Events/ScormLaunched.php b/lib/expander/src/Events/ScormLaunched.php
index 0d0f92875cc2adb572b7d688bb1d8acdb387a2d9..67580935d02178d5d700261524d4a954ac6bab7e 100644
--- a/lib/expander/src/Events/ScormLaunched.php
+++ b/lib/expander/src/Events/ScormLaunched.php
@@ -8,10 +8,10 @@ class ScormLaunched extends Event {
      * @override Event
      */
     public function read(array $opts) {
-        $scorm_scoes = $this->repo->readObject($opts['objectid'], $opts['objecttable']);
+        $scormScoes = $this->repo->readObject($opts['objectid'], $opts['objecttable']);
         return array_merge(parent::read($opts), [
-            'module' => $this->repo->readModule($scorm_scoes->scorm, 'scorm'),
-            'scorm_scoes' => $scorm_scoes
+            'module' => $this->repo->readModule($scormScoes->scorm, 'scorm'),
+            'scorm_scoes' => $scormScoes
         ]);
     }
 }
\ No newline at end of file
diff --git a/lib/expander/tests/EventTest.php b/lib/expander/tests/EventTest.php
index a8737c6beba4f487d41a40c5610445b254ddf938..c4753e5eb17789d19754cea1755e27c42494f5bb 100644
--- a/lib/expander/tests/EventTest.php
+++ b/lib/expander/tests/EventTest.php
@@ -92,9 +92,9 @@ class EventTest extends PhpUnitTestCase {
     }
 
     protected function createExampleFile($output) {
-        $class_array = explode('\\', get_class($this));
-        $event_name = str_replace('Test', '', array_pop($class_array));
-        $example_file = __DIR__.'/../docs/examples/'.$event_name.'.json';
-        file_put_contents($example_file, json_encode($output, JSON_PRETTY_PRINT));
+        $classArray = explode('\\', get_class($this));
+        $eventName = str_replace('Test', '', array_pop($classArray));
+        $exampleFile = __DIR__.'/../docs/examples/'.$eventName.'.json';
+        file_put_contents($exampleFile, json_encode($output, JSON_PRETTY_PRINT));
     }
 }
diff --git a/lib/translator/src/Controller.php b/lib/translator/src/Controller.php
index e6b672fa969e1534e81d55bb1465e9ad15ad96a6..66dc250ee5102ceffeda6e951500f8f43f229ff9 100644
--- a/lib/translator/src/Controller.php
+++ b/lib/translator/src/Controller.php
@@ -62,10 +62,10 @@ class Controller extends PhpObj {
         foreach ($events as $index => $opts) {
             $route = isset($opts['event']['eventname']) ? $opts['event']['eventname'] : '';
             if (isset(static::$routes[$route])) {
-                    $route_events = is_array(static::$routes[$route]) ? static::$routes[$route] : [static::$routes[$route]];
-                    foreach ($route_events as $route_event) {
+                    $routeEvents = is_array(static::$routes[$route]) ? static::$routes[$route] : [static::$routes[$route]];
+                    foreach ($routeEvents as $routeEvent) {
                     try {
-                        $event = '\MXTranslator\Events\\'.$route_event;
+                        $event = '\MXTranslator\Events\\'.$routeEvent;
                         foreach ((new $event())->read($opts) as $index => $result) {
                              array_push($results, $result);
                          }
diff --git a/lib/translator/tests/AttemptStartedTest.php b/lib/translator/tests/AttemptStartedTest.php
index 4250de710f15c7163e14a58f660a8b66d5dc4216..7ad689f8439faaf65c11409c8fcc94ac095cf5a1 100644
--- a/lib/translator/tests/AttemptStartedTest.php
+++ b/lib/translator/tests/AttemptStartedTest.php
@@ -36,11 +36,11 @@ class AttemptStartedTest extends ModuleViewedTest {
     }
 
     protected function assertAttempt($input, $output) {
-        $ext_key = 'http://lrs.learninglocker.net/define/extensions/moodle_attempt';
+        $extKey = 'http://lrs.learninglocker.net/define/extensions/moodle_attempt';
         $this->assertEquals($input->url, $output['attempt_url']);
         $this->assertEquals($input->name, $output['attempt_name']);
         $this->assertEquals(static::$xapiType.$input->type, $output['attempt_type']);
         $this->assertEquals($input, $output['attempt_ext']);
-        $this->assertEquals($ext_key, $output['attempt_ext_key']);
+        $this->assertEquals($extKey, $output['attempt_ext_key']);
     }
 }
diff --git a/lib/translator/tests/CourseCompletedTest.php b/lib/translator/tests/CourseCompletedTest.php
index 70f306759776c82d3a9ca15aba833a0e10da0eca..ecf667a8f1fbb064351ea86216439e3e63ef3e4b 100644
--- a/lib/translator/tests/CourseCompletedTest.php
+++ b/lib/translator/tests/CourseCompletedTest.php
@@ -32,12 +32,12 @@ class CourseCompletedTest extends EventTest {
 
     /**
      * Constructs the event with the given event name
-     * @param $event_name
+     * @param $eventName
      * @return array
      */
-    private function constructEvent($event_name) {
+    private function constructEvent($eventName) {
         return [
-            'eventname' => $event_name,
+            'eventname' => $eventName,
             'timecreated' => 1433946701,
         ];
     }
diff --git a/lib/translator/tests/DiscussionViewedTest.php b/lib/translator/tests/DiscussionViewedTest.php
index 2b6149364172b1c9b566d65ebdb82231fa65f945..661c89200a2477857a51371a7143efc641161d8f 100644
--- a/lib/translator/tests/DiscussionViewedTest.php
+++ b/lib/translator/tests/DiscussionViewedTest.php
@@ -34,12 +34,12 @@ class DiscussionViewedTest extends ModuleViewedTest {
     }
 
     private function assertDiscussion($input, $output, $type) {
-        $ext_key = 'http://lrs.learninglocker.net/define/extensions/moodle_discussion';
+        $extKey = 'http://lrs.learninglocker.net/define/extensions/moodle_discussion';
         $this->assertEquals($input->url, $output[$type.'_url']);
         $this->assertEquals($input->name, $output[$type.'_name']);
         $this->assertEquals('A Moodle discussion.', $output[$type.'_description']);
         $this->assertEquals(static::$xapiType.$input->type, $output[$type.'_type']);
         $this->assertEquals($input, $output[$type.'_ext']);
-        $this->assertEquals($ext_key, $output[$type.'_ext_key']);
+        $this->assertEquals($extKey, $output[$type.'_ext_key']);
     }
 }
diff --git a/lib/translator/tests/EventTest.php b/lib/translator/tests/EventTest.php
index 49ce6b50366e8b7aec8c4404a0ee9a807912ccb4..55ae99215a222d95ed38ed329c5ea17e9589eb10 100644
--- a/lib/translator/tests/EventTest.php
+++ b/lib/translator/tests/EventTest.php
@@ -56,9 +56,9 @@ abstract class EventTest extends PhpUnitTestCase {
         ];
     }
 
-    private function constructEvent($event_name) {
+    private function constructEvent($eventName) {
         return [
-            'eventname' => $event_name,
+            'eventname' => $eventName,
             'timecreated' => 1433946701,
         ];
     }
@@ -116,18 +116,18 @@ abstract class EventTest extends PhpUnitTestCase {
     }
 
     protected function assertCourse($input, $output, $type) {
-        $ext_key = 'http://lrs.learninglocker.net/define/extensions/moodle_course';
+        $extKey = 'http://lrs.learninglocker.net/define/extensions/moodle_course';
         $this->assertEquals($input->lang, $output['context_lang']);
         $this->assertEquals($input->url, $output[$type.'_url']);
         $this->assertEquals($input->fullname, $output[$type.'_name']);
         $this->assertEquals(strip_tags($input->summary), $output[$type.'_description']);
         $this->assertEquals(static::$xapiType.$input->type, $output[$type.'_type']);
         $this->assertEquals($input, $output[$type.'_ext']);
-        $this->assertEquals($ext_key, $output[$type.'_ext_key']);
+        $this->assertEquals($extKey, $output[$type.'_ext_key']);
     }
 
     protected function assertApp($input, $output, $type) {
-        $ext_key = 'http://lrs.learninglocker.net/define/extensions/moodle_course';
+        $extKey = 'http://lrs.learninglocker.net/define/extensions/moodle_course';
         $app_type = 'http://id.tincanapi.com/activitytype/site';
         $this->assertEquals($input->lang, $output['context_lang']);
         $this->assertEquals($input->url, $output[$type.'_url']);
@@ -135,7 +135,7 @@ abstract class EventTest extends PhpUnitTestCase {
         $this->assertEquals(strip_tags($input->summary), $output[$type.'_description']);
         $this->assertEquals($app_type, $output[$type.'_type']);
         $this->assertEquals($input, $output[$type.'_ext']);
-        $this->assertEquals($ext_key, $output[$type.'_ext_key']);
+        $this->assertEquals($extKey, $output[$type.'_ext_key']);
     }
 
     protected function assertSource($input, $output, $type) {
@@ -148,10 +148,10 @@ abstract class EventTest extends PhpUnitTestCase {
     }
 
     private function assertEvent($input, $output) {
-        $ext_key = 'http://lrs.learninglocker.net/define/extensions/moodle_logstore_standard_log';
+        $extKey = 'http://lrs.learninglocker.net/define/extensions/moodle_logstore_standard_log';
         $this->assertEquals('Moodle', $output['context_platform']);
         $this->assertEquals($input, $output['context_ext']);
-        $this->assertEquals($ext_key, $output['context_ext_key']);
+        $this->assertEquals($extKey, $output['context_ext_key']);
         $this->assertEquals(date('c', $input['timecreated']), $output['time']);
     }
 
@@ -163,9 +163,9 @@ abstract class EventTest extends PhpUnitTestCase {
     }
 
     protected function createExampleFile($output) {
-        $class_array = explode('\\', get_class($this));
-        $event_name = str_replace('Test', '', array_pop($class_array));
-        $example_file = __DIR__.'/../docs/examples/'.$event_name.'.json';
-        file_put_contents($example_file, json_encode($output, JSON_PRETTY_PRINT));
+        $classArray = explode('\\', get_class($this));
+        $eventName = str_replace('Test', '', array_pop($classArray));
+        $exampleFile = __DIR__.'/../docs/examples/'.$eventName.'.json';
+        file_put_contents($exampleFile, json_encode($output, JSON_PRETTY_PRINT));
     }
 }
diff --git a/lib/translator/tests/FeedbackSubmittedTest.php b/lib/translator/tests/FeedbackSubmittedTest.php
index 651e16f8b1990335bdb6e73d7eb896c04f8b8492..e81b05fca11d98926df2b9a7e5c1b2a103f3dc7a 100644
--- a/lib/translator/tests/FeedbackSubmittedTest.php
+++ b/lib/translator/tests/FeedbackSubmittedTest.php
@@ -68,12 +68,12 @@ class FeedbackSubmittedTest extends ModuleViewedTest {
     }
 
     protected function assertAttempt($input, $output) {
-        $ext_key = 'http://lrs.learninglocker.net/define/extensions/moodle_feedback_attempt';
+        $extKey = 'http://lrs.learninglocker.net/define/extensions/moodle_feedback_attempt';
         $this->assertEquals($input->url, $output['attempt_url']);
         $this->assertEquals($input->name, $output['attempt_name']);
         $this->assertEquals(static::$xapiType.$input->type, $output['attempt_type']);
         $this->assertEquals($input, $output['attempt_ext']);
-        $this->assertEquals($ext_key, $output['attempt_ext_key']);
+        $this->assertEquals($extKey, $output['attempt_ext_key']);
     }
 
 }
diff --git a/lib/translator/tests/ModuleViewedTest.php b/lib/translator/tests/ModuleViewedTest.php
index 59d5e540f6b77c4ad156cc9a28415863f830febc..1f1ec61211413980bcf718ce2751a0e875703857 100644
--- a/lib/translator/tests/ModuleViewedTest.php
+++ b/lib/translator/tests/ModuleViewedTest.php
@@ -33,12 +33,12 @@ class ModuleViewedTest extends CourseViewedTest {
     }
 
     private function assertModule($input, $output, $type) {
-        $ext_key = 'http://lrs.learninglocker.net/define/extensions/moodle_module';
+        $extKey = 'http://lrs.learninglocker.net/define/extensions/moodle_module';
         $this->assertEquals($input->url, $output[$type.'_url']);
         $this->assertEquals($input->name, $output[$type.'_name']);
         $this->assertEquals($input->intro, $output[$type.'_description']);
         $this->assertEquals(static::$xapiType.$input->type, $output[$type.'_type']);
         $this->assertEquals($input, $output[$type.'_ext']);
-        $this->assertEquals($ext_key, $output[$type.'_ext_key']);
+        $this->assertEquals($extKey, $output[$type.'_ext_key']);
     }
 }