diff --git a/extensions/apidoc/renderers/BaseRenderer.php b/extensions/apidoc/renderers/BaseRenderer.php
index eb0ceb7ec5..44842276f8 100644
--- a/extensions/apidoc/renderers/BaseRenderer.php
+++ b/extensions/apidoc/renderers/BaseRenderer.php
@@ -21,7 +21,6 @@ use yii\apidoc\models\TraitDoc;
 use yii\apidoc\models\TypeDoc;
 use yii\base\Component;
 use yii\console\Controller;
-use yii\helpers\Html;
 
 /**
  * Base class for all documentation renderers
diff --git a/extensions/apidoc/templates/bootstrap/ApiRenderer.php b/extensions/apidoc/templates/bootstrap/ApiRenderer.php
index a24cbf2c18..39b54584cf 100644
--- a/extensions/apidoc/templates/bootstrap/ApiRenderer.php
+++ b/extensions/apidoc/templates/bootstrap/ApiRenderer.php
@@ -7,11 +7,8 @@
 
 namespace yii\apidoc\templates\bootstrap;
 
-use yii\apidoc\models\Context;
-use yii\console\Controller;
 use Yii;
 use yii\helpers\Console;
-use yii\helpers\Html;
 
 /**
  *
diff --git a/extensions/apidoc/templates/bootstrap/GuideRenderer.php b/extensions/apidoc/templates/bootstrap/GuideRenderer.php
index 2df637d593..97672acedd 100644
--- a/extensions/apidoc/templates/bootstrap/GuideRenderer.php
+++ b/extensions/apidoc/templates/bootstrap/GuideRenderer.php
@@ -8,7 +8,6 @@
 namespace yii\apidoc\templates\bootstrap;
 
 use Yii;
-use yii\helpers\Html;
 
 /**
  *
diff --git a/extensions/apidoc/templates/online/ApiRenderer.php b/extensions/apidoc/templates/online/ApiRenderer.php
index 664162beed..5fa317a728 100644
--- a/extensions/apidoc/templates/online/ApiRenderer.php
+++ b/extensions/apidoc/templates/online/ApiRenderer.php
@@ -7,9 +7,7 @@
 
 namespace yii\apidoc\templates\online;
 
-use yii\apidoc\models\Context;
 use yii\apidoc\models\TypeDoc;
-use yii\console\Controller;
 use Yii;
 use yii\helpers\Console;
 
diff --git a/extensions/authclient/views/redirect.php b/extensions/authclient/views/redirect.php
index 3b5bb5bf15..5f8e51d89a 100644
--- a/extensions/authclient/views/redirect.php
+++ b/extensions/authclient/views/redirect.php
@@ -1,5 +1,4 @@
 <?php
-use yii\helpers\Html;
 use yii\helpers\Json;
 
 /* @var $this \yii\base\View */
diff --git a/extensions/mongodb/Collection.php b/extensions/mongodb/Collection.php
index 58294b34b1..d3c22b0191 100644
--- a/extensions/mongodb/Collection.php
+++ b/extensions/mongodb/Collection.php
@@ -10,7 +10,6 @@ namespace yii\mongodb;
 use yii\base\InvalidParamException;
 use yii\base\Object;
 use Yii;
-use yii\helpers\Json;
 
 /**
  * Collection represents the Mongo collection information.
diff --git a/framework/helpers/BaseUrl.php b/framework/helpers/BaseUrl.php
index 27970cf7d8..9971274f08 100644
--- a/framework/helpers/BaseUrl.php
+++ b/framework/helpers/BaseUrl.php
@@ -9,7 +9,6 @@ namespace yii\helpers;
 
 use Yii;
 use yii\base\InvalidParamException;
-use yii\web\Controller;
 
 /**
  * BaseUrl provides concrete implementation for [[Url]].
diff --git a/framework/rest/Controller.php b/framework/rest/Controller.php
index 6c760df300..4412ef0be9 100644
--- a/framework/rest/Controller.php
+++ b/framework/rest/Controller.php
@@ -12,7 +12,6 @@ use yii\filters\auth\CompositeAuth;
 use yii\filters\ContentNegotiator;
 use yii\filters\RateLimiter;
 use yii\web\Response;
-use yii\web\UnsupportedMediaTypeHttpException;
 use yii\filters\VerbFilter;
 use yii\web\ForbiddenHttpException;
 
diff --git a/tests/unit/framework/web/GroupUrlRuleTest.php b/tests/unit/framework/web/GroupUrlRuleTest.php
index 7a84ee5a14..29482d49f4 100644
--- a/tests/unit/framework/web/GroupUrlRuleTest.php
+++ b/tests/unit/framework/web/GroupUrlRuleTest.php
@@ -3,7 +3,6 @@
 namespace yiiunit\framework\web;
 
 use yii\web\UrlManager;
-use yii\web\UrlRule;
 use yii\web\GroupUrlRule;
 use yii\web\Request;
 use yiiunit\TestCase;