diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 61050db..dc0f465 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -168,7 +168,7 @@ jobs:
       - name: Code Quality (by PHPStan)
         run: ./vendor/bin/phpstan analyse
 
-  tests:
+  tests-sqlite:
     runs-on: ubuntu-latest
     needs:
       - check-dependencies
@@ -206,3 +206,55 @@ jobs:
 
       - name: PHPUnit Tests
         run: ./vendor/bin/phpunit --testdox
+
+  tests-mysql-8:
+    runs-on: ubuntu-latest
+    needs:
+      - check-dependencies
+      - xml-linting
+    strategy:
+      matrix:
+        php-version:
+          - 7.3
+          - 7.4
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "${{ matrix.php-version }}"
+
+      - name: Get Composer Cache Directory
+        id: composer-cache
+        run: |
+            echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - uses: actions/cache@v1
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
+      - name: Use expected composer version
+        run: sudo composer selfupdate --2
+
+      - name: Setup MySQL
+        uses: mirromutth/mysql-action@v1.1
+        with:
+          mysql version: '5.7'
+          mysql database: 'typo3'
+          mysql root password: 'root'
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress --no-suggest
+
+      - name: PHPUnit Tests
+        run: |-
+          export typo3DatabaseDriver="pdo_mysql"
+          export typo3DatabaseName="typo3"
+          export typo3DatabaseHost="127.0.0.1"
+          export typo3DatabaseUsername="root"
+          export typo3DatabasePassword="root"
+          ./vendor/bin/phpunit --testdox
diff --git a/Tests/Functional/Fixtures/Frontend/TouristAttractionsForIsAccessibleForFree.xml b/Tests/Functional/Fixtures/Frontend/TouristAttractionsForIsAccessibleForFree.xml
index cba5b94..ad4a306 100644
--- a/Tests/Functional/Fixtures/Frontend/TouristAttractionsForIsAccessibleForFree.xml
+++ b/Tests/Functional/Fixtures/Frontend/TouristAttractionsForIsAccessibleForFree.xml
@@ -5,7 +5,7 @@
         <pid>3</pid>
         <title>Attraktion mit false</title>
         <description></description>
-        <town></town>
+        <town>0</town>
         <media></media>
         <opening_hours></opening_hours>
         <address></address>
@@ -28,7 +28,7 @@
         <pid>3</pid>
         <title>Attraktion mit true</title>
         <description></description>
-        <town></town>
+        <town>0</town>
         <media></media>
         <opening_hours></opening_hours>
         <address></address>
diff --git a/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPets.xml b/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPets.xml
index f726f36..bb86587 100644
--- a/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPets.xml
+++ b/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPets.xml
@@ -5,7 +5,7 @@
         <pid>3</pid>
         <title>Attraktion mit pets_allowed = false</title>
         <description></description>
-        <town></town>
+        <town>0</town>
         <media></media>
         <opening_hours></opening_hours>
         <address></address>
@@ -27,7 +27,7 @@
         <pid>3</pid>
         <title>Attraktion mit pets_allowed = true</title>
         <description></description>
-        <town></town>
+        <town>0</town>
         <media></media>
         <opening_hours></opening_hours>
         <address></address>
diff --git a/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPublicAccess.xml b/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPublicAccess.xml
index d2f832b..5604dd9 100644
--- a/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPublicAccess.xml
+++ b/Tests/Functional/Fixtures/Frontend/TouristAttractionsForPublicAccess.xml
@@ -5,7 +5,7 @@
         <pid>3</pid>
         <title>Attraktion mit public_access = false</title>
         <description></description>
-        <town></town>
+        <town>0</town>
         <media></media>
         <opening_hours></opening_hours>
         <address></address>
@@ -27,7 +27,7 @@
         <pid>3</pid>
         <title>Attraktion mit public_access = true</title>
         <description></description>
-        <town></town>
+        <town>0</town>
         <media></media>
         <opening_hours></opening_hours>
         <address></address>
diff --git a/Tests/Functional/ImportTest.php b/Tests/Functional/ImportTest.php
index ad98d1d..bfaa013 100644
--- a/Tests/Functional/ImportTest.php
+++ b/Tests/Functional/ImportTest.php
@@ -167,19 +167,19 @@ class ImportTest extends TestCase
         self::assertCount(1, $organisations);
         self::assertSame('https://thuecat.org/resources/018132452787-ngbe', $organisations[0]['remote_id']);
         self::assertSame('Erfurt Tourismus und Marketing GmbH', $organisations[0]['title']);
-        self::assertSame('1', $organisations[0]['uid']);
+        self::assertSame(1, (int)$organisations[0]['uid']);
 
         $importLogs = $this->getAllRecords('tx_thuecat_import_log');
         self::assertCount(1, $importLogs);
-        self::assertSame('1', $importLogs[0]['configuration']);
-        self::assertSame('1', $importLogs[0]['uid']);
+        self::assertSame(1, (int)$importLogs[0]['configuration']);
+        self::assertSame(1, (int)$importLogs[0]['uid']);
 
         $importLogEntries = $this->getAllRecords('tx_thuecat_import_log_entry');
         self::assertCount(1, $importLogEntries);
-        self::assertSame('1', $importLogEntries[0]['import_log']);
-        self::assertSame('1', $importLogEntries[0]['record_uid']);
+        self::assertSame(1, (int)$importLogEntries[0]['import_log']);
+        self::assertSame(1, (int)$importLogEntries[0]['record_uid']);
         self::assertSame('tx_thuecat_organisation', $importLogEntries[0]['table_name']);
-        self::assertSame('0', $importLogEntries[0]['insertion']);
+        self::assertSame(0, (int)$importLogEntries[0]['insertion']);
         self::assertSame('[]', $importLogEntries[0]['errors']);
     }
 
diff --git a/ext_tables.sql b/ext_tables.sql
index 5a8f42a..d77c7c5 100644
--- a/ext_tables.sql
+++ b/ext_tables.sql
@@ -18,13 +18,13 @@ CREATE TABLE tx_thuecat_import_log_entry (
     record_uid int(11) unsigned DEFAULT '0' NOT NULL,
     table_name varchar(255) DEFAULT '' NOT NULL,
     insertion TINYINT(1) unsigned DEFAULT '0' NOT NULL,
-    errors text DEFAULT '' NOT NULL,
+    errors text,
 );
 
 CREATE TABLE tx_thuecat_organisation (
     remote_id varchar(255) DEFAULT '' NOT NULL,
     title varchar(255) DEFAULT '' NOT NULL,
-    description text DEFAULT '' NOT NULL,
+    description text,
     manages_towns int(11) unsigned DEFAULT '0' NOT NULL,
     manages_tourist_information int(11) unsigned DEFAULT '0' NOT NULL,
     manages_tourist_attraction int(11) unsigned DEFAULT '0' NOT NULL,
@@ -35,7 +35,7 @@ CREATE TABLE tx_thuecat_town (
     managed_by int(11) unsigned DEFAULT '0' NOT NULL,
     tourist_information int(11) unsigned DEFAULT '0' NOT NULL,
     title varchar(255) DEFAULT '' NOT NULL,
-    description text DEFAULT '' NOT NULL,
+    description text,
 );
 
 CREATE TABLE tx_thuecat_tourist_information (
@@ -43,7 +43,7 @@ CREATE TABLE tx_thuecat_tourist_information (
     managed_by int(11) unsigned DEFAULT '0' NOT NULL,
     town int(11) unsigned DEFAULT '0' NOT NULL,
     title varchar(255) DEFAULT '' NOT NULL,
-    description text DEFAULT '' NOT NULL,
+    description text,
 );
 
 CREATE TABLE tx_thuecat_tourist_attraction (
@@ -52,27 +52,27 @@ CREATE TABLE tx_thuecat_tourist_attraction (
     town int(11) unsigned DEFAULT '0' NOT NULL,
     parking_facility_near_by varchar(255) DEFAULT '' NOT NULL,
     title varchar(255) DEFAULT '' NOT NULL,
-    description text DEFAULT '' NOT NULL,
-    opening_hours text DEFAULT '' NOT NULL,
-    address text DEFAULT '' NOT NULL,
-    media text DEFAULT '' NOT NULL,
-    offers text DEFAULT '' NOT NULL,
-    slogan text DEFAULT '' NOT NULL,
-    start_of_construction text DEFAULT '' NOT NULL,
-    sanitation text DEFAULT '' NOT NULL,
-    other_service text DEFAULT '' NOT NULL,
-    museum_service text DEFAULT '' NOT NULL,
-    architectural_style text DEFAULT '' NOT NULL,
-    traffic_infrastructure text DEFAULT '' NOT NULL,
-    payment_accepted text DEFAULT '' NOT NULL,
-    digital_offer text DEFAULT '' NOT NULL,
-    photography text DEFAULT '' NOT NULL,
-    pets_allowed text DEFAULT '' NOT NULL,
-    is_accessible_for_free text DEFAULT '' NOT NULL,
-    public_access text DEFAULT '' NOT NULL,
-    available_languages text DEFAULT '' NOT NULL,
-    distance_to_public_transport text DEFAULT '' NOT NULL,
-    accessibility_specification text DEFAULT '' NOT NULL,
+    description text,
+    opening_hours text,
+    address text,
+    media text,
+    offers text,
+    slogan text,
+    start_of_construction text,
+    sanitation text,
+    other_service text,
+    museum_service text,
+    architectural_style text,
+    traffic_infrastructure text,
+    payment_accepted text,
+    digital_offer text,
+    photography text,
+    pets_allowed text,
+    is_accessible_for_free text,
+    public_access text,
+    available_languages text,
+    distance_to_public_transport text,
+    accessibility_specification text,
 );
 
 CREATE TABLE tx_thuecat_parking_facility (
@@ -80,14 +80,14 @@ CREATE TABLE tx_thuecat_parking_facility (
     managed_by int(11) unsigned DEFAULT '0' NOT NULL,
     town int(11) unsigned DEFAULT '0' NOT NULL,
     title varchar(255) DEFAULT '' NOT NULL,
-    description text DEFAULT '' NOT NULL,
-    opening_hours text DEFAULT '' NOT NULL,
-    address text DEFAULT '' NOT NULL,
-    media text DEFAULT '' NOT NULL,
-    offers text DEFAULT '' NOT NULL,
-    sanitation text DEFAULT '' NOT NULL,
-    other_service text DEFAULT '' NOT NULL,
-    traffic_infrastructure text DEFAULT '' NOT NULL,
-    payment_accepted text DEFAULT '' NOT NULL,
-    distance_to_public_transport text DEFAULT '' NOT NULL,
+    description text,
+    opening_hours text,
+    address text,
+    media text,
+    offers text,
+    sanitation text,
+    other_service text,
+    traffic_infrastructure text,
+    payment_accepted text,
+    distance_to_public_transport text,
 );