diff --git a/administrator/components/com_patchtester/install/sql/mysql/install.sql b/administrator/components/com_patchtester/install/sql/mysql/install.sql
index 3efd5b2..156e2e6 100644
--- a/administrator/components/com_patchtester/install/sql/mysql/install.sql
+++ b/administrator/components/com_patchtester/install/sql/mysql/install.sql
@@ -1,3 +1,5 @@
+DROP TABLE IF EXISTS `#__patchtester_pulls`;
+
 CREATE TABLE IF NOT EXISTS `#__patchtester_pulls` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `pull_id` int(11) NOT NULL,
@@ -6,7 +8,9 @@ CREATE TABLE IF NOT EXISTS `#__patchtester_pulls` (
   `pull_url` varchar(255) NOT NULL,
   `sha` varchar(40) NOT NULL,
   PRIMARY KEY (`id`)
-) DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 DEFAULT COLLATE=utf8mb4_unicode_ci;
+
+DROP TABLE IF EXISTS `#__patchtester_tests`;
 
 CREATE TABLE IF NOT EXISTS `#__patchtester_tests` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
@@ -17,4 +21,4 @@ CREATE TABLE IF NOT EXISTS `#__patchtester_tests` (
   `applied_version` varchar(25) NOT NULL,
   `comments` varchar(3000) NOT NULL,
   PRIMARY KEY (`id`)
-) DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 DEFAULT COLLATE=utf8mb4_unicode_ci;