diff --git a/phpunit.xml b/phpunit.xml
index ce50e64..9c0f214 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,3 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="vendor/autoload.php">
+<phpunit bootstrap="vendor/autoload.php"
+    displayDetailsOnIncompleteTests="true"
+    displayDetailsOnSkippedTests="true"
+    displayDetailsOnTestsThatTriggerErrors="true"
+    displayDetailsOnTestsThatTriggerNotices="true"
+    displayDetailsOnTestsThatTriggerWarnings="true">
 </phpunit>
\ No newline at end of file
diff --git a/tests/DateFormatTest.php b/tests/DateFormatTest.php
index 666b58b..b152738 100644
--- a/tests/DateFormatTest.php
+++ b/tests/DateFormatTest.php
@@ -30,16 +30,6 @@ protected function setUp(): void
         $this->object = new DateFormat('fr-CA');
     }
 
-    /**
-     * @covers ::__construct
-     */
-    public function testDefaultConstructor(): void
-    {
-        $obj2 = new DateFormat('en-CA');
-        
-        static::assertSame('en-CA', Assert::readAttribute($obj2, 'locale'));
-    }
-
     /**
      * @covers ::__construct
      */
@@ -59,7 +49,7 @@ public function testAddResource(): void
     {
         $this->object->addResource(__DIR__ . '/resources/dateformats.json');
         
-        $ref = Assert::readAttribute($this->object, 'formatters');
+        $ref = $this->object->__debugInfo();
         
         static::assertArrayHasKey('day_date', $ref['en-CA']);
         static::assertArrayHasKey('day_date_time', $ref['fr-CA']);
@@ -85,7 +75,7 @@ public function testFormat(string $expected, $input, string $locale): void
         static::assertSame($expected, $this->object->format($input, 'day', $locale));
     }
 
-    public function formatDataProvider(): iterable
+    public static function formatDataProvider(): iterable
     {
         $date = new DateTime('2014-01-01', new DateTimeZone(self::TIMEZONE));
         $date2 = DateTime::createFromFormat('Y-m-d H:i:s', '2014-07-01 08:00:00');
diff --git a/tests/ResourceTest.php b/tests/ResourceTest.php
index 5c2daaf..a29407b 100644
--- a/tests/ResourceTest.php
+++ b/tests/ResourceTest.php
@@ -6,7 +6,6 @@
 
 use Iterator;
 use JsonI18n\Resource;
-use PHPUnit\Framework\Error\Error;
 use PHPUnit\Framework\Error\Notice;
 use PHPUnit\Framework\TestCase;
 
@@ -33,7 +32,7 @@ class ResourceTest extends TestCase
      */
     protected $data = [
         'station' => "Station",
-        'goodbye' => "Have a good day!"
+        'goodbye' => "Have a good day!",
     ];
     
     /**
@@ -44,6 +43,7 @@ class ResourceTest extends TestCase
 
     protected function setUp(): void
     {
+        error_reporting(\E_ALL);
         $this->json = json_encode([$this->locale => $this->data]);
         $this->object = new Resource($this->locale, $this->data);
     }
@@ -58,7 +58,7 @@ public function testFromJson(): void
         $resource = Resource::fromJson($this->json);
         
         static::assertSame($this->locale, $resource->getLocale());
-        static::assertSame($this->data, $this->readAttribute($this->object, 'data'));
+        static::assertSame($this->data, $this->object->getData());
     }
 
     /**
@@ -84,12 +84,12 @@ public function testAddData(): void
     {
         $new = [
             'station' => 'Terminal',
-            'greeting' => 'Hello'
+            'greeting' => 'Hello',
         ];
         
         $this->object->addData($new);
         
-        $data = $this->readAttribute($this->object, 'data');
+        $data = $this->object->getData();
         
         static::assertArrayHasKey('greeting', $data);
         static::assertSame('Terminal', $data['station']);
@@ -102,12 +102,12 @@ public function testAddDataNoOverwrite(): void
     {
         $new = [
             'station' => 'Terminal',
-            'greeting' => 'Hello'
+            'greeting' => 'Hello',
         ];
         
         $this->object->addData($new, false);
         
-        $data = $this->readAttribute($this->object, 'data');
+        $data = $this->object->getData();
         static::assertSame('Station', $data['station']);
     }
 
@@ -126,12 +126,12 @@ public function testMerge(): void
     {
         $new = [
             'station' => 'Terminal',
-            'greeting' => 'Hello'
+            'greeting' => 'Hello',
         ];
         
         $this->object->merge(new Resource($this->locale, $new));
         
-        $data = $this->readAttribute($this->object, 'data');
+        $data = $this->object->getData();
         static::assertSame('Terminal', $data['station']);
         static::assertArrayHasKey('greeting', $new);
     }
@@ -143,12 +143,12 @@ public function testMergeNoOverwrite(): void
     {
         $new = [
             'station' => 'Terminal',
-            'greeting' => 'Hello'
+            'greeting' => 'Hello',
         ];
         
         $this->object->merge(new Resource($this->locale, $new), false);
         
-        $data = $this->readAttribute($this->object, 'data');
+        $data = $this->object->getData();
         static::assertSame('Station', $data['station']);
         static::assertArrayHasKey('greeting', $new);
     }
@@ -158,7 +158,16 @@ public function testMergeNoOverwrite(): void
      */
     public function testMergeDifferentLocales(): void
     {
-        static::expectException(Notice::class);
+        set_error_handler(
+            static function ( $errno, $errstr ) {
+                restore_error_handler();
+                throw new \Exception( $errstr, $errno );
+            },
+            E_ALL
+        );
+
+        static::expectException(\Exception::class);
+        static::expectExceptionCode(\E_USER_NOTICE);
 
         $this->object->merge(new Resource('zh-CN'));
     }
@@ -201,7 +210,7 @@ public function testOffsetGet(): void
      */
     public function testOffsetGetInexistent(): void
     {
-        static::expectException(Error::class);
+        static::expectException(\TypeError::class);
 
         $this->object['foo'];
     }
@@ -213,7 +222,7 @@ public function testOffsetSet(): void
     {
         $this->object['greeting'] = 'Hello';
         
-        static::assertArrayHasKey('greeting', $this->readAttribute($this->object, 'data'));
+        static::assertArrayHasKey('greeting', $this->object->getData());
     }
 
     /**
@@ -223,7 +232,7 @@ public function testOffsetUnset(): void
     {
         unset($this->object['station']);
         
-        static::assertArrayNotHasKey('station', $this->readAttribute($this->object, 'data'));
+        static::assertArrayNotHasKey('station', $this->object->getData());
     }
 
     /**
diff --git a/tests/TranslateTest.php b/tests/TranslateTest.php
index e224a4c..33e5030 100644
--- a/tests/TranslateTest.php
+++ b/tests/TranslateTest.php
@@ -8,7 +8,6 @@
 use JsonI18n\Translate;
 use LengthException;
 use OutOfBoundsException;
-use PHPUnit\Framework\Assert;
 use PHPUnit\Framework\TestCase;
 use TypeError;
 use const JSON_ERROR_SYNTAX;
@@ -38,7 +37,7 @@ class TranslateTest extends TestCase
         'headsign_en' => 'Blackbird Mall',
         'headsign_fr' => 'Centre commercial Blackbird',
         'subtext_en' => 'Main Street',
-        'subtext_fr' => 'Rue Main'
+        'subtext_fr' => 'Rue Main',
     ];
 
     /**
@@ -48,7 +47,7 @@ class TranslateTest extends TestCase
     protected $arr2D = [
         ['headsign_en' => 'University', 'headsign_fr' => 'Université'],
         ['headsign_en' => 'College', 'headsign_fr' => 'Collège'],
-        ['headsign_en' => 'Airport', 'headsign_fr' => 'Aéroport']
+        ['headsign_en' => 'Airport', 'headsign_fr' => 'Aéroport'],
     ];
 
     /**
@@ -62,8 +61,8 @@ class TranslateTest extends TestCase
         'crosstown' => [
             ['headsign_en' => 'Blackbird Mall', 'headsign_fr' => 'Centre commercial Blackbird'],
             ['headsign_en' => 'University', 'headsign_fr' => 'Université'],
-            ['headsign_en' => 'College', 'headsign_fr' => 'Collège']
-        ]
+            ['headsign_en' => 'College', 'headsign_fr' => 'Collège'],
+        ],
     ];
 
     protected function setUp(): void
@@ -78,7 +77,7 @@ public function testDefaultConstructor(): void
     {
         $obj2 = new Translate('en-CA');
         
-        static::assertSame('en-CA', Assert::readAttribute($obj2, 'lang'));
+        static::assertSame('en-CA', $this->object->getLanguage());
     }
 
     /**
@@ -135,12 +134,11 @@ public function testAddResourceFile(): void
     {
         $this->object->addResource(__DIR__ . '/resources/test.json');
 
-        $data = Assert::readAttribute($this->object, 'data');
+        $data = $this->object->__debugInfo();
 
         static::assertNotEmpty($data);
         static::assertArrayHasKey('en-CA', $data);
         static::assertArrayHasKey('fr-CA', $data);
-        static::assertNotEmpty(Assert::readAttribute($this->object, 'arrayGroups'));
     }
     
     /**
@@ -156,7 +154,7 @@ public function testAddResourceArray(): void
         
         $this->object->addResource($array);
         
-        $data = Assert::readAttribute($this->object, 'data');
+        $data = $this->object->__debugInfo();
 
         static::assertArrayHasKey('en-CA', $data);
         static::assertArrayHasKey('fr-CA', $data);
@@ -171,12 +169,11 @@ public function testAddResourceJson(): void
     {
         $this->object->addResource($this->json, 'json');
 
-        $data = Assert::readAttribute($this->object, 'data');
+        $data = $this->object->__debugInfo();
 
         static::assertNotEmpty($data);
         static::assertArrayHasKey('en-CA', $data);
         static::assertArrayHasKey('fr-CA', $data);
-        static::assertNotEmpty(Assert::readAttribute($this->object, 'arrayGroups'));
     }
     
     /**
@@ -362,7 +359,7 @@ public function testLocalize1DArray(): void
         
         static::assertEquals([
             'headsign' => 'Blackbird Mall',
-            'subtext' => 'Rue Main'
+            'subtext' => 'Rue Main',
         ], $arr1);
     }
 
@@ -381,13 +378,13 @@ public function testLocalize2DArray(): void
         static::assertEquals([
             ['headsign' => 'University'],
             ['headsign' => 'College'],
-            ['headsign' => 'Airport']
+            ['headsign' => 'Airport'],
         ], $arr1);
 
         static::assertEquals([
             ['headsign' => 'Université'],
             ['headsign' => 'Collège'],
-            ['headsign' => 'Aéroport']
+            ['headsign' => 'Aéroport'],
         ], $arr2);
     }
 
@@ -408,9 +405,9 @@ public function testLocalize3DArray(): void
             'crosstown' => [
                 ['headsign' => 'Blackbird Mall'],
                 ['headsign' => 'University'],
-                ['headsign' => 'College']
-            ]], $arr
-        );
+                ['headsign' => 'College'],
+            ],
+        ], $arr);
     }
     
     /**