diff --git a/framework/validators/BooleanValidator.php b/framework/validators/BooleanValidator.php
index 09b45f3c3b..91e534a08e 100644
--- a/framework/validators/BooleanValidator.php
+++ b/framework/validators/BooleanValidator.php
@@ -67,13 +67,13 @@ class BooleanValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         $options = [
             'trueValue' => $this->trueValue,
             'falseValue' => $this->falseValue,
             'message' => Yii::$app->getI18n()->format($this->message, [
-                'attribute' => $object->getAttributeLabel($attribute),
+                'attribute' => $model->getAttributeLabel($attribute),
                 'true' => $this->trueValue,
                 'false' => $this->falseValue,
             ], Yii::$app->language),
diff --git a/framework/validators/CompareValidator.php b/framework/validators/CompareValidator.php
index 70bc3ffd3a..44c18e84b0 100644
--- a/framework/validators/CompareValidator.php
+++ b/framework/validators/CompareValidator.php
@@ -117,11 +117,11 @@ class CompareValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
-        $value = $object->$attribute;
+        $value = $model->$attribute;
         if (is_array($value)) {
-            $this->addError($object, $attribute, Yii::t('yii', '{attribute} is invalid.'));
+            $this->addError($model, $attribute, Yii::t('yii', '{attribute} is invalid.'));
 
             return;
         }
@@ -129,12 +129,12 @@ class CompareValidator extends Validator
             $compareLabel = $compareValue = $this->compareValue;
         } else {
             $compareAttribute = $this->compareAttribute === null ? $attribute . '_repeat' : $this->compareAttribute;
-            $compareValue = $object->$compareAttribute;
-            $compareLabel = $object->getAttributeLabel($compareAttribute);
+            $compareValue = $model->$compareAttribute;
+            $compareLabel = $model->getAttributeLabel($compareAttribute);
         }
 
         if (!$this->compareValues($this->operator, $this->type, $value, $compareValue)) {
-            $this->addError($object, $attribute, $this->message, [
+            $this->addError($model, $attribute, $this->message, [
                 'compareAttribute' => $compareLabel,
                 'compareValue' => $compareValue,
             ]);
@@ -201,7 +201,7 @@ class CompareValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         $options = [
             'operator' => $this->operator,
@@ -213,8 +213,8 @@ class CompareValidator extends Validator
             $compareValue = $this->compareValue;
         } else {
             $compareAttribute = $this->compareAttribute === null ? $attribute . '_repeat' : $this->compareAttribute;
-            $compareValue = $object->getAttributeLabel($compareAttribute);
-            $options['compareAttribute'] = Html::getInputId($object, $compareAttribute);
+            $compareValue = $model->getAttributeLabel($compareAttribute);
+            $options['compareAttribute'] = Html::getInputId($model, $compareAttribute);
         }
 
         if ($this->skipOnEmpty) {
@@ -222,7 +222,7 @@ class CompareValidator extends Validator
         }
 
         $options['message'] = Yii::$app->getI18n()->format($this->message, [
-            'attribute' => $object->getAttributeLabel($attribute),
+            'attribute' => $model->getAttributeLabel($attribute),
             'compareAttribute' => $compareValue,
             'compareValue' => $compareValue,
         ], Yii::$app->language);
diff --git a/framework/validators/DateValidator.php b/framework/validators/DateValidator.php
index eee0ca3db5..8ee5210281 100644
--- a/framework/validators/DateValidator.php
+++ b/framework/validators/DateValidator.php
@@ -94,14 +94,14 @@ class DateValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
-        $value = $object->$attribute;
+        $value = $model->$attribute;
         $timestamp = $this->parseDateValue($value);
         if ($timestamp === false) {
-            $this->addError($object, $attribute, $this->message, []);
+            $this->addError($model, $attribute, $this->message, []);
         } elseif ($this->timestampAttribute !== null) {
-            $object->{$this->timestampAttribute} = $timestamp;
+            $model->{$this->timestampAttribute} = $timestamp;
         }
     }
 
diff --git a/framework/validators/DefaultValueValidator.php b/framework/validators/DefaultValueValidator.php
index 0d803111f7..d31c2f4a19 100644
--- a/framework/validators/DefaultValueValidator.php
+++ b/framework/validators/DefaultValueValidator.php
@@ -41,13 +41,13 @@ class DefaultValueValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
-        if ($this->isEmpty($object->$attribute)) {
+        if ($this->isEmpty($model->$attribute)) {
             if ($this->value instanceof \Closure) {
-                $object->$attribute = call_user_func($this->value, $object, $attribute);
+                $model->$attribute = call_user_func($this->value, $model, $attribute);
             } else {
-                $object->$attribute = $this->value;
+                $model->$attribute = $this->value;
             }
         }
     }
diff --git a/framework/validators/EmailValidator.php b/framework/validators/EmailValidator.php
index ee8c77efa3..3a1f82b366 100644
--- a/framework/validators/EmailValidator.php
+++ b/framework/validators/EmailValidator.php
@@ -92,14 +92,14 @@ class EmailValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         $options = [
             'pattern' => new JsExpression($this->pattern),
             'fullPattern' => new JsExpression($this->fullPattern),
             'allowName' => $this->allowName,
             'message' => Yii::$app->getI18n()->format($this->message, [
-                'attribute' => $object->getAttributeLabel($attribute),
+                'attribute' => $model->getAttributeLabel($attribute),
             ], Yii::$app->language),
             'enableIDN' => (boolean) $this->enableIDN,
         ];
diff --git a/framework/validators/ExistValidator.php b/framework/validators/ExistValidator.php
index 20236f00dd..2657391477 100644
--- a/framework/validators/ExistValidator.php
+++ b/framework/validators/ExistValidator.php
@@ -81,7 +81,7 @@ class ExistValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
         $targetAttribute = $this->targetAttribute === null ? $attribute : $this->targetAttribute;
 
@@ -91,31 +91,31 @@ class ExistValidator extends Validator
             }
             $params = [];
             foreach ($targetAttribute as $k => $v) {
-                $params[$v] = is_integer($k) ? $object->$v : $object->$k;
+                $params[$v] = is_integer($k) ? $model->$v : $model->$k;
             }
         } else {
-            $params = [$targetAttribute => $object->$attribute];
+            $params = [$targetAttribute => $model->$attribute];
         }
 
         if (!$this->allowArray) {
             foreach ($params as $value) {
                 if (is_array($value)) {
-                    $this->addError($object, $attribute, Yii::t('yii', '{attribute} is invalid.'));
+                    $this->addError($model, $attribute, Yii::t('yii', '{attribute} is invalid.'));
 
                     return;
                 }
             }
         }
 
-        $targetClass = $this->targetClass === null ? get_class($object) : $this->targetClass;
+        $targetClass = $this->targetClass === null ? get_class($model) : $this->targetClass;
         $query = $this->createQuery($targetClass, $params);
 
-        if (is_array($object->$attribute)) {
-            if ($query->count("DISTINCT [[$targetAttribute]]") != count($object->$attribute)) {
-                $this->addError($object, $attribute, $this->message);
+        if (is_array($model->$attribute)) {
+            if ($query->count("DISTINCT [[$targetAttribute]]") != count($model->$attribute)) {
+                $this->addError($model, $attribute, $this->message);
             }
         } elseif (!$query->exists()) {
-            $this->addError($object, $attribute, $this->message);
+            $this->addError($model, $attribute, $this->message);
         }
     }
 
diff --git a/framework/validators/FileValidator.php b/framework/validators/FileValidator.php
index d43119c524..16c38ba830 100644
--- a/framework/validators/FileValidator.php
+++ b/framework/validators/FileValidator.php
@@ -166,12 +166,12 @@ class FileValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
         if ($this->maxFiles > 1) {
-            $files = $object->$attribute;
+            $files = $model->$attribute;
             if (!is_array($files)) {
-                $this->addError($object, $attribute, $this->uploadRequired);
+                $this->addError($model, $attribute, $this->uploadRequired);
 
                 return;
             }
@@ -180,24 +180,24 @@ class FileValidator extends Validator
                     unset($files[$i]);
                 }
             }
-            $object->$attribute = array_values($files);
+            $model->$attribute = array_values($files);
             if (empty($files)) {
-                $this->addError($object, $attribute, $this->uploadRequired);
+                $this->addError($model, $attribute, $this->uploadRequired);
             }
             if (count($files) > $this->maxFiles) {
-                $this->addError($object, $attribute, $this->tooMany, ['limit' => $this->maxFiles]);
+                $this->addError($model, $attribute, $this->tooMany, ['limit' => $this->maxFiles]);
             } else {
                 foreach ($files as $file) {
                     $result = $this->validateValue($file);
                     if (!empty($result)) {
-                        $this->addError($object, $attribute, $result[0], $result[1]);
+                        $this->addError($model, $attribute, $result[0], $result[1]);
                     }
                 }
             }
         } else {
-            $result = $this->validateValue($object->$attribute);
+            $result = $this->validateValue($model->$attribute);
             if (!empty($result)) {
-                $this->addError($object, $attribute, $result[0], $result[1]);
+                $this->addError($model, $attribute, $result[0], $result[1]);
             }
         }
     }
@@ -334,22 +334,22 @@ class FileValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         ValidationAsset::register($view);
-        $options = $this->getClientOptions($object, $attribute);
+        $options = $this->getClientOptions($model, $attribute);
         return 'yii.validation.file(attribute, messages, ' . json_encode($options, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) . ');';
     }
 
     /**
      * Returns the client side validation options.
-     * @param \yii\base\Model $object the model being validated
+     * @param \yii\base\Model $model the model being validated
      * @param string $attribute the attribute name being validated
      * @return array the client side validation options
      */
-    protected function getClientOptions($object, $attribute)
+    protected function getClientOptions($model, $attribute)
     {
-        $label = $object->getAttributeLabel($attribute);
+        $label = $model->getAttributeLabel($attribute);
 
         $options = [];
         if ($this->message !== null) {
diff --git a/framework/validators/FilterValidator.php b/framework/validators/FilterValidator.php
index edc171d037..bd0404e695 100644
--- a/framework/validators/FilterValidator.php
+++ b/framework/validators/FilterValidator.php
@@ -65,11 +65,11 @@ class FilterValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
-        $value = $object->$attribute;
+        $value = $model->$attribute;
         if (!$this->skipOnArray || !is_array($value)) {
-            $object->$attribute = call_user_func($this->filter, $value);
+            $model->$attribute = call_user_func($this->filter, $value);
         }
     }
 }
diff --git a/framework/validators/ImageValidator.php b/framework/validators/ImageValidator.php
index 6643c6ceb0..9fa38d5efd 100644
--- a/framework/validators/ImageValidator.php
+++ b/framework/validators/ImageValidator.php
@@ -162,21 +162,21 @@ class ImageValidator extends FileValidator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         ValidationAsset::register($view);
-        $options = $this->getClientOptions($object, $attribute);
+        $options = $this->getClientOptions($model, $attribute);
         return 'yii.validation.image(attribute, messages, ' . json_encode($options, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) . ', deferred);';
     }
 
     /**
      * @inheritdoc
      */
-    protected function getClientOptions($object, $attribute)
+    protected function getClientOptions($model, $attribute)
     {
-        $options = parent::getClientOptions($object, $attribute);
+        $options = parent::getClientOptions($model, $attribute);
 
-        $label = $object->getAttributeLabel($attribute);
+        $label = $model->getAttributeLabel($attribute);
 
         if ($this->notImage !== null) {
             $options['notImage'] = Yii::$app->getI18n()->format($this->notImage, [
diff --git a/framework/validators/InlineValidator.php b/framework/validators/InlineValidator.php
index 0e5cd33919..c4f4b950cf 100644
--- a/framework/validators/InlineValidator.php
+++ b/framework/validators/InlineValidator.php
@@ -58,11 +58,11 @@ class InlineValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
         $method = $this->method;
         if (is_string($method)) {
-            $method = [$object, $method];
+            $method = [$model, $method];
         }
         call_user_func($method, $attribute, $this->params);
     }
@@ -70,12 +70,12 @@ class InlineValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         if ($this->clientValidate !== null) {
             $method = $this->clientValidate;
             if (is_string($method)) {
-                $method = [$object, $method];
+                $method = [$model, $method];
             }
 
             return call_user_func($method, $attribute, $this->params);
diff --git a/framework/validators/NumberValidator.php b/framework/validators/NumberValidator.php
index e299e96eca..bd7660cdc9 100644
--- a/framework/validators/NumberValidator.php
+++ b/framework/validators/NumberValidator.php
@@ -75,22 +75,22 @@ class NumberValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
-        $value = $object->$attribute;
+        $value = $model->$attribute;
         if (is_array($value)) {
-            $this->addError($object, $attribute, $this->message);
+            $this->addError($model, $attribute, $this->message);
             return;
         }
         $pattern = $this->integerOnly ? $this->integerPattern : $this->numberPattern;
         if (!preg_match($pattern, "$value")) {
-            $this->addError($object, $attribute, $this->message);
+            $this->addError($model, $attribute, $this->message);
         }
         if ($this->min !== null && $value < $this->min) {
-            $this->addError($object, $attribute, $this->tooSmall, ['min' => $this->min]);
+            $this->addError($model, $attribute, $this->tooSmall, ['min' => $this->min]);
         }
         if ($this->max !== null && $value > $this->max) {
-            $this->addError($object, $attribute, $this->tooBig, ['max' => $this->max]);
+            $this->addError($model, $attribute, $this->tooBig, ['max' => $this->max]);
         }
     }
 
@@ -117,9 +117,9 @@ class NumberValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
-        $label = $object->getAttributeLabel($attribute);
+        $label = $model->getAttributeLabel($attribute);
 
         $options = [
             'pattern' => new JsExpression($this->integerOnly ? $this->integerPattern : $this->numberPattern),
diff --git a/framework/validators/RangeValidator.php b/framework/validators/RangeValidator.php
index 370a1d5554..04f37b293c 100644
--- a/framework/validators/RangeValidator.php
+++ b/framework/validators/RangeValidator.php
@@ -79,7 +79,7 @@ class RangeValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         $range = [];
         foreach ($this->range as $value) {
@@ -89,7 +89,7 @@ class RangeValidator extends Validator
             'range' => $range,
             'not' => $this->not,
             'message' => Yii::$app->getI18n()->format($this->message, [
-                'attribute' => $object->getAttributeLabel($attribute),
+                'attribute' => $model->getAttributeLabel($attribute),
             ], Yii::$app->language),
         ];
         if ($this->skipOnEmpty) {
diff --git a/framework/validators/RegularExpressionValidator.php b/framework/validators/RegularExpressionValidator.php
index dee81ff12f..acf7482db5 100644
--- a/framework/validators/RegularExpressionValidator.php
+++ b/framework/validators/RegularExpressionValidator.php
@@ -62,7 +62,7 @@ class RegularExpressionValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         $pattern = $this->pattern;
         $pattern = preg_replace('/\\\\x\{?([0-9a-fA-F]+)\}?/', '\u$1', $pattern);
@@ -82,7 +82,7 @@ class RegularExpressionValidator extends Validator
             'pattern' => new JsExpression($pattern),
             'not' => $this->not,
             'message' => Yii::$app->getI18n()->format($this->message, [
-                'attribute' => $object->getAttributeLabel($attribute),
+                'attribute' => $model->getAttributeLabel($attribute),
             ], Yii::$app->language),
         ];
         if ($this->skipOnEmpty) {
diff --git a/framework/validators/RequiredValidator.php b/framework/validators/RequiredValidator.php
index 3b57876a09..e416b10864 100644
--- a/framework/validators/RequiredValidator.php
+++ b/framework/validators/RequiredValidator.php
@@ -86,7 +86,7 @@ class RequiredValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         $options = [];
         if ($this->requiredValue !== null) {
@@ -102,7 +102,7 @@ class RequiredValidator extends Validator
         }
 
         $options['message'] = Yii::$app->getI18n()->format($options['message'], [
-            'attribute' => $object->getAttributeLabel($attribute),
+            'attribute' => $model->getAttributeLabel($attribute),
         ], Yii::$app->language);
 
         ValidationAsset::register($view);
diff --git a/framework/validators/SafeValidator.php b/framework/validators/SafeValidator.php
index fcb8440ec5..846d63e68a 100644
--- a/framework/validators/SafeValidator.php
+++ b/framework/validators/SafeValidator.php
@@ -18,7 +18,7 @@ class SafeValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
     }
 }
diff --git a/framework/validators/StringValidator.php b/framework/validators/StringValidator.php
index 0ca40c6c69..a9a34b24db 100644
--- a/framework/validators/StringValidator.php
+++ b/framework/validators/StringValidator.php
@@ -96,12 +96,12 @@ class StringValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
-        $value = $object->$attribute;
+        $value = $model->$attribute;
 
         if (!is_string($value)) {
-            $this->addError($object, $attribute, $this->message);
+            $this->addError($model, $attribute, $this->message);
 
             return;
         }
@@ -109,13 +109,13 @@ class StringValidator extends Validator
         $length = mb_strlen($value, $this->encoding);
 
         if ($this->min !== null && $length < $this->min) {
-            $this->addError($object, $attribute, $this->tooShort, ['min' => $this->min]);
+            $this->addError($model, $attribute, $this->tooShort, ['min' => $this->min]);
         }
         if ($this->max !== null && $length > $this->max) {
-            $this->addError($object, $attribute, $this->tooLong, ['max' => $this->max]);
+            $this->addError($model, $attribute, $this->tooLong, ['max' => $this->max]);
         }
         if ($this->length !== null && $length !== $this->length) {
-            $this->addError($object, $attribute, $this->notEqual, ['length' => $this->length]);
+            $this->addError($model, $attribute, $this->notEqual, ['length' => $this->length]);
         }
     }
 
@@ -146,9 +146,9 @@ class StringValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
-        $label = $object->getAttributeLabel($attribute);
+        $label = $model->getAttributeLabel($attribute);
 
         $options = [
             'message' => Yii::$app->getI18n()->format($this->message, [
diff --git a/framework/validators/UniqueValidator.php b/framework/validators/UniqueValidator.php
index 9b0388a9f3..eb90494a9e 100644
--- a/framework/validators/UniqueValidator.php
+++ b/framework/validators/UniqueValidator.php
@@ -74,24 +74,24 @@ class UniqueValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
         /* @var $targetClass ActiveRecordInterface */
-        $targetClass = $this->targetClass === null ? get_class($object) : $this->targetClass;
+        $targetClass = $this->targetClass === null ? get_class($model) : $this->targetClass;
         $targetAttribute = $this->targetAttribute === null ? $attribute : $this->targetAttribute;
 
         if (is_array($targetAttribute)) {
             $params = [];
             foreach ($targetAttribute as $k => $v) {
-                $params[$v] = is_integer($k) ? $object->$v : $object->$k;
+                $params[$v] = is_integer($k) ? $model->$v : $model->$k;
             }
         } else {
-            $params = [$targetAttribute => $object->$attribute];
+            $params = [$targetAttribute => $model->$attribute];
         }
 
         foreach ($params as $value) {
             if (is_array($value)) {
-                $this->addError($object, $attribute, Yii::t('yii', '{attribute} is invalid.'));
+                $this->addError($model, $attribute, Yii::t('yii', '{attribute} is invalid.'));
 
                 return;
             }
@@ -106,14 +106,14 @@ class UniqueValidator extends Validator
             $query->andWhere($this->filter);
         }
 
-        if (!$object instanceof ActiveRecordInterface || $object->getIsNewRecord()) {
-            // if current $object isn't in the database yet then it's OK just to call exists()
+        if (!$model instanceof ActiveRecordInterface || $model->getIsNewRecord()) {
+            // if current $model isn't in the database yet then it's OK just to call exists()
             $exists = $query->exists();
         } else {
-            // if current $object is in the database already we can't use exists()
-            /* @var $objects ActiveRecordInterface[] */
-            $objects = $query->limit(2)->all();
-            $n = count($objects);
+            // if current $model is in the database already we can't use exists()
+            /* @var $models ActiveRecordInterface[] */
+            $models = $query->limit(2)->all();
+            $n = count($models);
             if ($n === 1) {
                 $keys = array_keys($params);
                 $pks = $targetClass::primaryKey();
@@ -121,10 +121,10 @@ class UniqueValidator extends Validator
                 sort($pks);
                 if ($keys === $pks) {
                     // primary key is modified and not unique
-                    $exists = $object->getOldPrimaryKey() != $object->getPrimaryKey();
+                    $exists = $model->getOldPrimaryKey() != $model->getPrimaryKey();
                 } else {
                     // non-primary key, need to exclude the current record based on PK
-                    $exists = $objects[0]->getPrimaryKey() != $object->getOldPrimaryKey();
+                    $exists = $models[0]->getPrimaryKey() != $model->getOldPrimaryKey();
                 }
             } else {
                 $exists = $n > 1;
@@ -132,7 +132,7 @@ class UniqueValidator extends Validator
         }
 
         if ($exists) {
-            $this->addError($object, $attribute, $this->message);
+            $this->addError($model, $attribute, $this->message);
         }
     }
 }
diff --git a/framework/validators/UrlValidator.php b/framework/validators/UrlValidator.php
index 4c2c0a5291..11b67cd46c 100644
--- a/framework/validators/UrlValidator.php
+++ b/framework/validators/UrlValidator.php
@@ -66,14 +66,14 @@ class UrlValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function validateAttribute($object, $attribute)
+    public function validateAttribute($model, $attribute)
     {
-        $value = $object->$attribute;
+        $value = $model->$attribute;
         $result = $this->validateValue($value);
         if (!empty($result)) {
-            $this->addError($object, $attribute, $result[0], $result[1]);
+            $this->addError($model, $attribute, $result[0], $result[1]);
         } elseif ($this->defaultScheme !== null && strpos($value, '://') === false) {
-            $object->$attribute = $this->defaultScheme . '://' . $value;
+            $model->$attribute = $this->defaultScheme . '://' . $value;
         }
     }
 
@@ -111,7 +111,7 @@ class UrlValidator extends Validator
     /**
      * @inheritdoc
      */
-    public function clientValidateAttribute($object, $attribute, $view)
+    public function clientValidateAttribute($model, $attribute, $view)
     {
         if (strpos($this->pattern, '{schemes}') !== false) {
             $pattern = str_replace('{schemes}', '(' . implode('|', $this->validSchemes) . ')', $this->pattern);
@@ -122,7 +122,7 @@ class UrlValidator extends Validator
         $options = [
             'pattern' => new JsExpression($pattern),
             'message' => Yii::$app->getI18n()->format($this->message, [
-                'attribute' => $object->getAttributeLabel($attribute),
+                'attribute' => $model->getAttributeLabel($attribute),
             ], Yii::$app->language),
             'enableIDN' => (boolean) $this->enableIDN,
         ];