diff --git a/.travis.yml b/.travis.yml
index 890e1c30..a1fa5f95 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,7 +30,7 @@ env:
 matrix:
   include:
     - php: 7.0
-      env: WP_VERSION=
+      env: WP_VERSION= DB_CHARSET=utf8mb4
     - php: 5.3
       env: WP_VERSION=
     - php: 5.4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9aad1b7b..35a43606 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,21 @@
 ## Changelog ##
 
 
+### 0.21.10 ###
+
+Improve database charset operations
+
+* If your DB_CHARSET was set to utf8mb4, then you could have issues in plugin activation
+* If your DB_CHARSET was set to latin1, then you could have issues with scales showing
+
+To completely clear DB from wp-testing in case of activation issues you can use the script:
+
+  https://github.com/garex/wp-testing/blob/master/db/sql/drop-all.sql
+
+
+This hotfix is mostly for those, who was having troubles with plugin activation.
+
+
 ### 0.21.9 ###
 
 Update readme to latest plugin directory format.
diff --git a/README.md b/README.md
index b8391831..b7970e7a 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 **Tested up to:** 4.9
 
-**Stable tag:** 0.21.9
+**Stable tag:** 0.21.10
 
 **License:** GPLv3
 
diff --git a/composer.json b/composer.json
index 85f8af23..c682c8d2 100644
--- a/composer.json
+++ b/composer.json
@@ -149,10 +149,10 @@
                 "source": {
                     "url": "https://github.com/garex/flourish-classes",
                     "type": "git",
-                    "reference": "0a5b2536d9736b6fe12d8ab1b8f9ad341d2397bf"
+                    "reference": "c826410c3edb9da885e70c6f05d714b357fb2a4a"
                 },
                 "dist": {
-                    "url": "https://github.com/garex/flourish-classes/archive/0a5b2536d9736b6fe12d8ab1b8f9ad341d2397bf.zip",
+                    "url": "https://github.com/garex/flourish-classes/archive/c826410c3edb9da885e70c6f05d714b357fb2a4a.zip",
                     "type": "zip"
                 }
             }
diff --git a/composer.lock.dist b/composer.lock.dist
index 895230a1..bbf939c9 100644
--- a/composer.lock.dist
+++ b/composer.lock.dist
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "617c766c15cc0c7a37ad96d17b98cf6c",
-    "content-hash": "a29878b55574f5f4db7e877534d849b9",
+    "hash": "3609284e2b5a713f8a7eb70c8d29e467",
+    "content-hash": "a7d9019a859b7d6219377847c504cb4d",
     "packages": [
         {
             "name": "broofa/node-uuid",
@@ -18,7 +18,7 @@
             "dist": {
                 "type": "zip",
                 "url": "https://github.com/broofa/node-uuid/archive/v1.4.7.zip",
-                "reference": null,
+                "reference": "309512573ec1c60143c257157479a20f7f1f51cd",
                 "shasum": null
             },
             "type": "library"
@@ -124,12 +124,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/garex/flourish-classes",
-                "reference": "0a5b2536d9736b6fe12d8ab1b8f9ad341d2397bf"
+                "reference": "c826410c3edb9da885e70c6f05d714b357fb2a4a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://github.com/garex/flourish-classes/archive/0a5b2536d9736b6fe12d8ab1b8f9ad341d2397bf.zip",
-                "reference": null,
+                "url": "https://github.com/garex/flourish-classes/archive/c826410c3edb9da885e70c6f05d714b357fb2a4a.zip",
+                "reference": "c826410c3edb9da885e70c6f05d714b357fb2a4a",
                 "shasum": null
             },
             "type": "library",
@@ -138,7 +138,7 @@
                     "."
                 ]
             },
-            "time": "2015-09-27 06:52:10"
+            "time": "2018-03-18 16:33:05"
         },
         {
             "name": "nikic/php-parser",
@@ -196,7 +196,7 @@
             "dist": {
                 "type": "zip",
                 "url": "https://github.com/garex/ruckusing-migrations/archive/issue/avoid-schema-constant.zip",
-                "reference": null,
+                "reference": "issue/avoid-schema-constant",
                 "shasum": null
             },
             "require": {
@@ -224,7 +224,7 @@
             "dist": {
                 "type": "zip",
                 "url": "https://github.com/samyk/evercookie/archive/977db236367c509ce6b10fb565ed5a75c8d729d5.zip",
-                "reference": null,
+                "reference": "977db236367c509ce6b10fb565ed5a75c8d729d5",
                 "shasum": null
             },
             "type": "library",
diff --git a/db/migrations/wp_testing/Base/Base.php b/db/migrations/wp_testing/Base/Base.php
index 1ac42239..6c3a770b 100644
--- a/db/migrations/wp_testing/Base/Base.php
+++ b/db/migrations/wp_testing/Base/Base.php
@@ -46,6 +46,8 @@ abstract public function down();
 
     public function execute($query)
     {
+        $this->adaptee->get_adapter()->logger->log(trim($query, ';') . ';');
+
         return $this->adaptee->execute($query);
     }
 
diff --git a/db/sql/drop-all.sql b/db/sql/drop-all.sql
index f1b44106..5669ab88 100644
--- a/db/sql/drop-all.sql
+++ b/db/sql/drop-all.sql
@@ -1,35 +1,31 @@
--- SHOW TABLE STATUS;
+-- All table names here use default table prefix "wp_"
+-- It's defined in your wp-config.php by string like:
+--    $table_prefix = 'wp_';
+-- If your setting not default, then just replace in this script "wp_" onto your setting.
 
--- DROP SCHEMA IF EXISTS wp_testing2; CREATE SCHEMA wp_testing2;
-
--- USE wp_testing;
+-- !!! WARNING !!!
+-- This script will erase completely your's database part, related to wp-testing plugin.
+-- So if you alerady has some tests/passings/scores, then you must not run this script.
+-- !!! WARNING !!!
 
 SET FOREIGN_KEY_CHECKS = 0;
 
-DROP TABLE IF EXISTS wp_t_answers;
-DROP TABLE IF EXISTS wp_t_answers_parameters;
-DROP TABLE IF EXISTS wp_t_parameters;
-DROP TABLE IF EXISTS wp_t_questions;
-DROP TABLE IF EXISTS wp_t_scales;
-DROP TABLE IF EXISTS wp_t_scales_tests;
 DROP TABLE IF EXISTS wp_t_schema_migrations;
-DROP TABLE IF EXISTS wp_t_tests;
-
+DROP TABLE IF EXISTS wp_t_field_values;
 DROP TABLE IF EXISTS wp_t_formulas;
 DROP TABLE IF EXISTS wp_t_passing_answers;
 DROP TABLE IF EXISTS wp_t_passings;
 DROP TABLE IF EXISTS wp_t_scores;
+DROP TABLE IF EXISTS wp_t_sections;
+DROP TABLE IF EXISTS wp_t_answers;
+DROP TABLE IF EXISTS wp_t_fields;
+DROP TABLE IF EXISTS wp_t_questions;
+DROP TABLE IF EXISTS wp_t_computed_variables;
 
 SET FOREIGN_KEY_CHECKS = 1;
 
-DELETE FROM wp_posts WHERE post_title LIKE '%EPI%';
-DELETE FROM wp_terms WHERE term_id > 1;
-DELETE FROM wp_postmeta WHERE post_id NOT IN (
-	SELECT ID FROM wp_posts
-);
-
-DELETE FROM wp_term_relationships WHERE object_id NOT IN (
-	SELECT ID FROM wp_posts
-);
-DELETE FROM wp_term_taxonomy where taxonomy like 'wpt\_%';
-
+DELETE FROM wp_postmeta where meta_key like 'wpt_%';
+DELETE FROM wp_posts WHERE post_type = 'wpt_test';
+DELETE FROM wp_term_taxonomy where taxonomy like 'wpt_%';
+DELETE FROM wp_term_relationships WHERE term_taxonomy_id NOT IN (SELECT term_taxonomy_id FROM wp_term_taxonomy);
+DELETE FROM wp_terms WHERE term_id NOT IN (SELECT term_id FROM wp_term_taxonomy);
diff --git a/src/Doer/Installer.php b/src/Doer/Installer.php
index 36a913e1..fba47757 100644
--- a/src/Doer/Installer.php
+++ b/src/Doer/Installer.php
@@ -112,7 +112,8 @@ private function setNetworkWide($value = null)
 
     private function upgradeOnBlog()
     {
-        $this->migrateDatabase(array(__FILE__, 'db:migrate'));
+        $this->migrateDatabase(array(__FILE__, 'db:setup',   'env=fixed-charset'));
+        $this->migrateDatabase(array(__FILE__, 'db:migrate', 'env=development'));
         new WpTesting_Doer_WordPressEntitiesRegistrator($this->wp);
         $this->flushRewrite();
     }
@@ -183,11 +184,15 @@ private function migrateDatabase($argv)
                     'pluginPrefix' => $wptPrefix,
                     'schema_version_table_name' => $wptPrefix . 'schema_migrations',
                 ),
+                'fixed-charset' => array(
+                    'charset'  => 'utf8',
+                ),
             ),
             'db_dir'         => $databaseDirectory,
             'migrations_dir' => array('default' => $databaseDirectory . '/migrations'),
             'log_dir'        => $this->wp->getTempDir() . 'wp_testing_' . md5(__FILE__),
         );
+        $config['db']['fixed-charset'] = array_merge($config['db']['development'], $config['db']['fixed-charset']);
 
         $runner = new Ruckusing_FrameworkRunner($config, $argv);
         restore_error_handler();
diff --git a/src/Facade.php b/src/Facade.php
index 2fc93ff5..c25e4bfa 100644
--- a/src/Facade.php
+++ b/src/Facade.php
@@ -224,11 +224,21 @@ public function setupORM()
         // Extract port from host. See wpdb::db_connect
         $port = null;
         $host = $this->wp->getDbHost();
+        $m = array();
         if (preg_match('/^(.+):(\d+)$/', trim($host), $m)) {
             $host = $m[1];
             $port = $m[2];
         }
-        $database = new fDatabase('mysql', $this->wp->getDbName(), $this->wp->getDbUser(), $this->wp->getDbPassword(), $host, $port);
+        $database = new fDatabase(
+            'mysql',
+            $this->wp->getDbName(),
+            $this->wp->getDbUser(),
+            $this->wp->getDbPassword(),
+            $host,
+            $port,
+            null,
+            $this->wp->getDbCharset()
+        );
         fORMDatabase::attach($database);
 
         fORM::mapClassToTable('WpTesting_Model_Test',          $wpPrefix   . 'posts');
diff --git a/tests/integration-environment/create.sh b/tests/integration-environment/create.sh
index 65a04fb6..88fa29dd 100755
--- a/tests/integration-environment/create.sh
+++ b/tests/integration-environment/create.sh
@@ -91,7 +91,7 @@ function install_wp {
         log '.. patching wordpress'
         patch -p0 < $WP_PATCH
     fi
-    cp ../wp-config.php wp-config.php
+    cat ../wp-config.php | sed 's/utf8/'$DB_CHARSET'/' > wp-config.php
     log '.. installing'
     wget --quiet --output-document=- --post-data='weblog_title=wpti&user_name=wpti&admin_password=wpti&admin_password2=wpti&admin_email=wpti%40wpti.dev&blog_public=1' $WP_T_SERVER'/wp-admin/install.php?step=2' | grep installed
 }
diff --git a/tests/phpunit/Mock/WordPressFacade.php b/tests/phpunit/Mock/WordPressFacade.php
index 42c768d4..96d6686a 100644
--- a/tests/phpunit/Mock/WordPressFacade.php
+++ b/tests/phpunit/Mock/WordPressFacade.php
@@ -38,7 +38,7 @@ public function getTablePrefix()
 
     public function getDbCharset()
     {
-        return 'utf-8';
+        return $this->db['charset'];
     }
 
     public function isMultisite()
@@ -154,6 +154,7 @@ public function getExtended($post)
         // Version from 4.3
 
         // Match the new style more links.
+        $matches = array();
         if (preg_match('/<!--more(.*?)?-->/', $post, $matches)) {
             list($main, $extended) = explode($matches[0], $post, 2);
             $more_text = $matches[1];
diff --git a/tests/phpunit/Model/QuestionTest.php b/tests/phpunit/Model/QuestionTest.php
index 3f0e604e..41f1125c 100644
--- a/tests/phpunit/Model/QuestionTest.php
+++ b/tests/phpunit/Model/QuestionTest.php
@@ -21,8 +21,6 @@ protected function tearDown()
 
     public function testQuestionSavedInUtfEncoding()
     {
-        $link = $this->db->getConnection();
-
         $question = new WpTesting_Model_Question();
         $question->setTitle('راهنمایی برای ایجاد آزمون های روانشناسی.')->setTestId(1);
         $id = $question->store()->getId();
diff --git a/wp-testing.php b/wp-testing.php
index 4a0005b9..0305120c 100644
--- a/wp-testing.php
+++ b/wp-testing.php
@@ -3,7 +3,7 @@
  * Plugin Name: Wp-testing
  * Plugin URI: http://wordpress.org/extend/plugins/wp-testing/
  * Description: Helps to create psychological tests.
- * Version: 0.21.9
+ * Version: 0.21.10
  * Author: Alexander Ustimenko
  * Author URI: http://ustimen.co
  * License: GPL3