diff --git a/lib/scripto.js b/lib/scripto.js
index d4a973a..f480d2d 100644
--- a/lib/scripto.js
+++ b/lib/scripto.js
@@ -1,160 +1,146 @@
-var fs      = require('fs');
-var path    = require('path');
-var debug   = require('debug')('scripto');
-
-function Scripto (redisClient) {
-    
-    var scripts = {};
-    var scriptShas = this._scriptShas = {};
-
-    this.load = function load(scriptObject) {
-
-        mergeObjects(scripts, scriptObject);
-        loadScriptsIntoRedis(redisClient, scriptObject, afterShasLoaded);
-    };
-
-    this.loadFromFile = function loadFromFile(name, filepath) {
-
-        var loadedScripts = {};
-        loadedScripts[name] = fs.readFileSync(filepath, 'utf8');
-        this.load(loadedScripts);
-    };
-
-    this.loadFromDir = function loadFromDir(scriptsDir) {
-
-        var loadedScripts = loadScriptsFromDir(scriptsDir);
-        this.load(loadedScripts);
-    };
-
-
-    this.run = function run(scriptName, keys, args, callback) {
-
-        if(scripts[scriptName]) {  
-            if(scriptShas[scriptName]) {
-                var sha = scriptShas[scriptName];
-                evalShaScript(redisClient, sha, keys, args, callback);
-            } else {
-                var script = scripts[scriptName];
-                evalScript(redisClient, script, keys, args, callback);
-            }
-        } else {
-            callback(new Error('NO_SUCH_SCRIPT'));
-        }
-    };
-
-    this.eval = function eval(scriptName, keys, args, callback) {
-
-        if(scripts[scriptName]) {
-            var script = scripts[scriptName];
-            evalScript(redisClient, script, keys, args, callback);
-        } else {
-            callback(new Error('NO_SUCH_SCRIPT'));
-        }
-    };
-
-    this.evalSha = function evalSha(scriptName, keys, args, callback) {
-
-        if(scriptShas[scriptName]) {
-            var sha = scriptShas[scriptName];
-            evalShaScript(redisClient, sha, keys, args, callback);
-        } else {
-            callback(new Error('NO_SUCH_SCRIPT_SHA'));
-        }
-    };
-
-    //load scripts into redis in every time it connects to it
-    redisClient.on('connect', function() {
-
-        debug('loading scripts into redis again, aftet-reconnect');
-        loadScriptsIntoRedis(redisClient, scripts, afterShasLoaded);
-    }); 
-
-    //reset shas after error occured
-    redisClient.on('error', function(err) {
-
-        var errorMessage = (err)? err.toString() : "";
-        debug('resetting scriptShas due to redis connection error: ' + errorMessage);
-        scriptShas = {};
-    });   
-
-    function afterShasLoaded(err, shas) {
-
-        if(err) {
-            debug('scripts loading failed due to redis command error: ' + err.toString());
-        } else {
-            debug('loaded scriptShas');
-            mergeObjects(scriptShas, shas);
-        }
+const fs = require("fs");
+const path = require("path");
+const debug = require("debug")("scripto");
+
+function Scripto(redisClient) {
+  const scripts = {};
+  const scriptShas = {};
+  this.load = function (scriptObject) {
+    mergeObjects(scripts, scriptObject);
+    loadScriptsIntoRedis(redisClient, scriptObject, afterShasLoaded);
+  };
+
+  this.loadFromFile = function (name, filepath) {
+    const loadedScripts = {};
+    loadedScripts[name] = fs.readFileSync(filepath, "utf8");
+    this.load(loadedScripts);
+  };
+
+  this.loadFromDir = function (scriptsDir) {
+    const loadedScripts = loadScriptsFromDir(scriptsDir);
+    this.load(loadedScripts);
+  };
+
+  this.run = function (scriptName, keys, args, callback) {
+    if (scripts[scriptName]) {
+      if (scriptShas[scriptName]) {
+        const sha = scriptShas[scriptName];
+        evalShaScript(redisClient, sha, keys, args, callback);
+      } else {
+        const script = scripts[scriptName];
+        evalScript(redisClient, script, keys, args, callback);
+      }
+    } else {
+      callback(new Error("NO_SUCH_SCRIPT"));
     }
-
-    function mergeObjects (obj1, obj2) {
-        
-        for(var key in obj2) {
-            obj1[key] = obj2[key];
-        }
+  };
+
+  this.eval = function (scriptName, keys, args, callback) {
+    if (scripts[scriptName]) {
+      const script = scripts[scriptName];
+      evalScript(redisClient, script, keys, args, callback);
+    } else {
+      callback(new Error("NO_SUCH_SCRIPT"));
     }
+  };
+
+  this.evalSha = function (scriptName, keys, args, callback) {
+    if (scriptShas[scriptName]) {
+      const sha = scriptShas[scriptName];
+      evalShaScript(redisClient, sha, keys, args, callback);
+    } else {
+      callback(new Error("NO_SUCH_SCRIPT_SHA"));
+    }
+  };
+
+  //load scripts into redis in every time it connects to it
+  redisClient.on("connect", function () {
+    debug("loading scripts into redis again, aftet-reconnect");
+    loadScriptsIntoRedis(redisClient, scripts, afterShasLoaded);
+  });
+
+  //reset shas after error occured
+  redisClient.on("error", function (err) {
+    const errorMessage = err ? err.toString() : "";
+    debug(
+      "resetting scriptShas due to redis connection error: " + errorMessage
+    );
+    scriptShas = {};
+  });
+
+  function afterShasLoaded(err, shas) {
+    if (err) {
+      debug(
+        "scripts loading failed due to redis command error: " + err.toString()
+      );
+    } else {
+      debug("loaded scriptShas");
+      mergeObjects(scriptShas, shas);
+    }
+  }
 
+  function mergeObjects(obj1, obj2) {
+    for (const key in obj2) {
+      obj1[key] = obj2[key];
+    }
+  }
 }
 
 module.exports = Scripto;
 
 function loadScriptsFromDir(scriptsDir) {
+  const names = fs.readdirSync(scriptsDir);
+  const scripts = {};
 
-    var names = fs.readdirSync(scriptsDir);
-    var scripts = {};
-
-    names.forEach(function(name) {
-
-        var filename = path.resolve(scriptsDir, name);
-        var key = name.replace('.lua', '');
+  names.forEach(function (name) {
+    const filename = path.resolve(scriptsDir, name);
+    const key = name.replace(".lua", "");
 
-        scripts[key] = fs.readFileSync(filename, 'utf8');
-    });
+    scripts[key] = fs.readFileSync(filename, "utf8");
+  });
 
-    return scripts;
+  return scripts;
 }
 
-function loadScriptsIntoRedis (redisClient, scripts, callback) {
-
-    var cnt = 0;
-    var keys = Object.keys(scripts);
-    var shas = {};
-
-    (function doLoad() {
-
-        if(cnt < keys.length) {
-            var key = keys[cnt++];
-
-            redisClient.send_command('script', ['load', scripts[key]], function(err, sha) {
-
-                if(err) {
-                    callback(err);
-                } else {
-                    shas[key] = sha;
-                    doLoad();
-                }
-            });
-        } else {
-            callback(null, shas);
+function loadScriptsIntoRedis(redisClient, scripts, callback) {
+  let cnt = 0;
+  const keys = Object.keys(scripts);
+  const shas = {};
+
+  (function doLoad() {
+    if (cnt < keys.length) {
+      const key = keys[cnt++];
+
+      redisClient.send_command(
+        "script",
+        ["load", scripts[key]],
+        function (err, sha) {
+          if (err) {
+            callback(err);
+          } else {
+            shas[key] = sha;
+            doLoad();
+          }
         }
-
-    })();
+      );
+    } else {
+      callback(null, shas);
+    }
+  })();
 }
 
 function evalScript(redisClient, script, keys, args, callback) {
+  const keysLength = keys.length || 0;
+  const arguments = [keysLength].concat(keys, args);
+  arguments.unshift(script);
 
-    var keysLength= keys.length || 0;
-    var arguments = [keysLength].concat(keys, args);
-    arguments.unshift(script);
-
-    redisClient.send_command('eval', arguments, callback);
+  redisClient.send_command("eval", arguments, callback);
 }
 
 function evalShaScript(redisClient, sha, keys, args, callback) {
+  const keysLength = keys.length || 0;
+  const arguments = [keysLength].concat(keys, args);
+  arguments.unshift(sha);
 
-    var keysLength= keys.length || 0;
-    var arguments = [keysLength].concat(keys, args);
-    arguments.unshift(sha);
-
-    redisClient.send_command('evalsha', arguments, callback);
-}
\ No newline at end of file
+  redisClient.send_command("evalsha", arguments, callback);
+}
diff --git a/package-lock.json b/package-lock.json
index b2fe03b..2476e6f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,8 +1,1050 @@
 {
-  "name": "redis-scripto",
-  "version": "0.1.3",
-  "lockfileVersion": 1,
+  "name": "redis-scripto2",
+  "version": "0.2.2",
+  "lockfileVersion": 2,
   "requires": true,
+  "packages": {
+    "": {
+      "name": "redis-scripto2",
+      "version": "0.2.2",
+      "dependencies": {
+        "debug": "^4.3.3",
+        "ioredis": "^4.28.3"
+      },
+      "devDependencies": {
+        "mocha": "^9.1.3"
+      },
+      "engines": {
+        "node": ">= 12"
+      }
+    },
+    "node_modules/@ungap/promise-all-settled": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@ungap/promise-all-settled/-/promise-all-settled-1.1.2.tgz",
+      "integrity": "sha512-sL/cEvJWAnClXw0wHk85/2L0G6Sj8UB0Ctc1TEMbKSsmpRosqhwj9gWgFRZSrBr2f9tiXISwNhCPmlfqUqyb9Q==",
+      "dev": true
+    },
+    "node_modules/ansi-colors": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
+      "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/ansi-styles": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "dev": true,
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/anymatch": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.2.tgz",
+      "integrity": "sha512-P43ePfOAIupkguHUycrc4qJ9kz8ZiuOUijaETwX7THt0Y/GNK7v0aa8rY816xWjZ7rJdA5XdMcpVFTKMq+RvWg==",
+      "dev": true,
+      "dependencies": {
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/argparse": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+      "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
+      "dev": true
+    },
+    "node_modules/balanced-match": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
+      "dev": true
+    },
+    "node_modules/binary-extensions": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
+      "integrity": "sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/brace-expansion": {
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+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "node_modules/braces": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
+      "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
+      "dev": true,
+      "dependencies": {
+        "fill-range": "^7.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/browser-stdout": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
+      "dev": true
+    },
+    "node_modules/camelcase": {
+      "version": "6.3.0",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.3.0.tgz",
+      "integrity": "sha512-Gmy6FhYlCY7uOElZUSbxo2UCDH8owEk996gkbrpsgGtrJLM3J7jGxl9Ic7Qwwj4ivOE5AWZWRMecDdF7hqGjFA==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/chalk": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+      "dev": true,
+      "dependencies": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/chalk?sponsor=1"
+      }
+    },
+    "node_modules/chalk/node_modules/supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
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+      "dependencies": {
+        "has-flag": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/chokidar": {
+      "version": "3.5.2",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.2.tgz",
+      "integrity": "sha512-ekGhOnNVPgT77r4K/U3GDhu+FQ2S8TnK/s2KbIGXi0SZWuwkZ2QNyfWdZW+TVfn84DpEP7rLeCt2UI6bJ8GwbQ==",
+      "dev": true,
+      "dependencies": {
+        "anymatch": "~3.1.2",
+        "braces": "~3.0.2",
+        "glob-parent": "~5.1.2",
+        "is-binary-path": "~2.1.0",
+        "is-glob": "~4.0.1",
+        "normalize-path": "~3.0.0",
+        "readdirp": "~3.6.0"
+      },
+      "engines": {
+        "node": ">= 8.10.0"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
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+    "node_modules/cliui": {
+      "version": "7.0.4",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-7.0.4.tgz",
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+      "dev": true,
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^7.0.0"
+      }
+    },
+    "node_modules/cluster-key-slot": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/cluster-key-slot/-/cluster-key-slot-1.1.0.tgz",
+      "integrity": "sha512-2Nii8p3RwAPiFwsnZvukotvow2rIHM+yQ6ZcBXGHdniadkYGZYiGmkHJIbZPIV9nfv7m/U1IPMVVcAhoWFeklw==",
+      "engines": {
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+      }
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+    "node_modules/color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "dev": true,
+      "dependencies": {
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+      "dev": true
+    },
+    "node_modules/concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+      "dev": true
+    },
+    "node_modules/debug": {
+      "version": "4.3.3",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
+      "integrity": "sha512-/zxw5+vh1Tfv+4Qn7a5nsbcJKPaSvCDhojn6FEl9vupwK2VCSDtEiEtqr8DFtzYFOdz63LBkxec7DYuc2jon6Q==",
+      "dependencies": {
+        "ms": "2.1.2"
+      },
+      "engines": {
+        "node": ">=6.0"
+      },
+      "peerDependenciesMeta": {
+        "supports-color": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/decamelize": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-4.0.0.tgz",
+      "integrity": "sha512-9iE1PgSik9HeIIw2JO94IidnE3eBoQrFJ3w7sFuzSX4DpmZ3v5sZpUiV5Swcf6mQEF+Y0ru8Neo+p+nyh2J+hQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/denque": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/denque/-/denque-1.5.1.tgz",
+      "integrity": "sha512-XwE+iZ4D6ZUB7mfYRMb5wByE8L74HCn30FBN7sWnXksWc1LO1bPDl67pBR9o/kC4z/xSNAwkMYcGgqDV3BE3Hw==",
+      "engines": {
+        "node": ">=0.10"
+      }
+    },
+    "node_modules/diff": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-5.0.0.tgz",
+      "integrity": "sha512-/VTCrvm5Z0JGty/BWHljh+BAiw3IK+2j87NGMu8Nwc/f48WoDAC395uomO9ZD117ZOBaHmkX1oyLvkVM/aIT3w==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.3.1"
+      }
+    },
+    "node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "dev": true
+    },
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+        "debug": "^4.3.1",
+        "denque": "^1.1.0",
+        "lodash.defaults": "^4.2.0",
+        "lodash.flatten": "^4.4.0",
+        "lodash.isarguments": "^3.1.0",
+        "p-map": "^2.1.0",
+        "redis-commands": "1.7.0",
+        "redis-errors": "^1.2.0",
+        "redis-parser": "^3.0.0",
+        "standard-as-callback": "^2.1.0"
+      }
+    },
     "is-binary-path": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
@@ -360,15 +1384,15 @@
       "dev": true
     },
     "is-fullwidth-code-point": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
-      "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+      "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
       "dev": true
     },
     "is-glob": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.1.tgz",
-      "integrity": "sha512-5G0tKtBTFImOqDnLB2hG6Bp2qcKEFduo4tZu9MT/H6NQv/ghhy30o55ufafxJ/LdH79LLs2Kfrn85TLKyA7BUg==",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
+      "integrity": "sha512-xelSayHH36ZgE7ZWhli7pW34hNbNl8Ojv5KVmkJD4hBdD3th8Tfk9vYasLM+mXWOZhFkgZfxhLSnrwRr4elSSg==",
       "dev": true,
       "requires": {
         "is-extglob": "^2.1.1"
@@ -416,6 +1440,21 @@
         "p-locate": "^5.0.0"
       }
     },
+    "lodash.defaults": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/lodash.defaults/-/lodash.defaults-4.2.0.tgz",
+      "integrity": "sha1-0JF4cW/+pN3p5ft7N/bwgCJ0WAw="
+    },
+    "lodash.flatten": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/lodash.flatten/-/lodash.flatten-4.4.0.tgz",
+      "integrity": "sha1-8xwiIlqWMtK7+OSt2+8kCqdlph8="
+    },
+    "lodash.isarguments": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz",
+      "integrity": "sha1-L1c9hcaiQon/AGY7SRwdM4/zRYo="
+    },
     "log-symbols": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/log-symbols/-/log-symbols-4.1.0.tgz",
@@ -436,16 +1475,16 @@
       }
     },
     "mocha": {
-      "version": "9.0.3",
-      "resolved": "https://registry.npmjs.org/mocha/-/mocha-9.0.3.tgz",
-      "integrity": "sha512-hnYFrSefHxYS2XFGtN01x8un0EwNu2bzKvhpRFhgoybIvMaOkkL60IVPmkb5h6XDmUl4IMSB+rT5cIO4/4bJgg==",
+      "version": "9.1.3",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-9.1.3.tgz",
+      "integrity": "sha512-Xcpl9FqXOAYqI3j79pEtHBBnQgVXIhpULjGQa7DVb0Po+VzmSIK9kanAiWLHoRR/dbZ2qpdPshuXr8l1VaHCzw==",
       "dev": true,
       "requires": {
         "@ungap/promise-all-settled": "1.1.2",
         "ansi-colors": "4.1.1",
         "browser-stdout": "1.3.1",
         "chokidar": "3.5.2",
-        "debug": "4.3.1",
+        "debug": "4.3.2",
         "diff": "5.0.0",
         "escape-string-regexp": "4.0.0",
         "find-up": "5.0.0",
@@ -456,12 +1495,11 @@
         "log-symbols": "4.1.0",
         "minimatch": "3.0.4",
         "ms": "2.1.3",
-        "nanoid": "3.1.23",
+        "nanoid": "3.1.25",
         "serialize-javascript": "6.0.0",
         "strip-json-comments": "3.1.1",
         "supports-color": "8.1.1",
         "which": "2.0.2",
-        "wide-align": "1.1.3",
         "workerpool": "6.1.5",
         "yargs": "16.2.0",
         "yargs-parser": "20.2.4",
@@ -469,9 +1507,9 @@
       },
       "dependencies": {
         "debug": {
-          "version": "4.3.1",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.1.tgz",
-          "integrity": "sha512-doEwdvm4PCeK4K3RQN2ZC2BYUBaxwLARCqZmMjtF8a51J2Rb0xpVloFRnCODwqjpwnAoao4pelN8l3RJdv3gRQ==",
+          "version": "4.3.2",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.2.tgz",
+          "integrity": "sha512-mOp8wKcvj7XxC78zLgw/ZA+6TSgkoE2C/ienthhRD298T7UNwAg9diBpLRxC0mOezLl4B0xV7M0cCO6P/O0Xhw==",
           "dev": true,
           "requires": {
             "ms": "2.1.2"
@@ -484,19 +1522,24 @@
               "dev": true
             }
           }
+        },
+        "ms": {
+          "version": "2.1.3",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+          "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
+          "dev": true
         }
       }
     },
     "ms": {
-      "version": "2.1.3",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
-      "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
-      "dev": true
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+      "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
     },
     "nanoid": {
-      "version": "3.1.23",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.23.tgz",
-      "integrity": "sha512-FiB0kzdP0FFVGDKlRLEQ1BgDzU87dy5NnzjeW9YZNt+/c3+q82EQDUwniSAUxp/F0gFNI1ZhKU1FqYsMuqZVnw==",
+      "version": "3.1.25",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.25.tgz",
+      "integrity": "sha512-rdwtIXaXCLFAQbnfqDRnI6jaRHp9fTcYBjtFKE8eezcZ7LuLjhUaQGNeMXf1HmRoCH32CLz6XwX0TtxEOS/A3Q==",
       "dev": true
     },
     "normalize-path": {
@@ -532,6 +1575,11 @@
         "p-limit": "^3.0.2"
       }
     },
+    "p-map": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/p-map/-/p-map-2.1.0.tgz",
+      "integrity": "sha512-y3b8Kpd8OAN444hxfBbFfj1FY/RjtTd8tzYwhUqNYXx0fXx2iX4maP4Qr6qhIKbQXI02wTLAda4fYUbDagTUFw=="
+    },
     "path-exists": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
@@ -545,9 +1593,9 @@
       "dev": true
     },
     "picomatch": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.0.tgz",
-      "integrity": "sha512-lY1Q/PiJGC2zOv/z391WOTD+Z02bCgsFfvxoXXf6h7kv9o+WmsmzYqrAwY63sNgOxE4xEdq0WyUnXfKeBrSvYw==",
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
       "dev": true
     },
     "randombytes": {
@@ -568,17 +1616,6 @@
         "picomatch": "^2.2.1"
       }
     },
-    "redis": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/redis/-/redis-3.1.2.tgz",
-      "integrity": "sha512-grn5KoZLr/qrRQVwoSkmzdbw6pwF+/rwODtrOr6vuBRiR/f3rjSTGupbF90Zpqm2oenix8Do6RV7pYEkGwlKkw==",
-      "requires": {
-        "denque": "^1.5.0",
-        "redis-commands": "^1.7.0",
-        "redis-errors": "^1.2.0",
-        "redis-parser": "^3.0.0"
-      }
-    },
     "redis-commands": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/redis-commands/-/redis-commands-1.7.0.tgz",
@@ -618,23 +1655,29 @@
         "randombytes": "^2.1.0"
       }
     },
+    "standard-as-callback": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/standard-as-callback/-/standard-as-callback-2.1.0.tgz",
+      "integrity": "sha512-qoRRSyROncaz1z0mvYqIE4lCd9p2R90i6GxW3uZv5ucSu8tU7B5HXUP1gG8pVZsYNVaXjk8ClXHPttLyxAL48A=="
+    },
     "string-width": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
-      "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
+      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
       "dev": true,
       "requires": {
-        "is-fullwidth-code-point": "^2.0.0",
-        "strip-ansi": "^4.0.0"
+        "emoji-regex": "^8.0.0",
+        "is-fullwidth-code-point": "^3.0.0",
+        "strip-ansi": "^6.0.1"
       }
     },
     "strip-ansi": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
-      "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
       "dev": true,
       "requires": {
-        "ansi-regex": "^3.0.0"
+        "ansi-regex": "^5.0.1"
       }
     },
     "strip-json-comments": {
@@ -670,15 +1713,6 @@
         "isexe": "^2.0.0"
       }
     },
-    "wide-align": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
-      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
-      "dev": true,
-      "requires": {
-        "string-width": "^1.0.2 || 2"
-      }
-    },
     "workerpool": {
       "version": "6.1.5",
       "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.1.5.tgz",
@@ -694,40 +1728,6 @@
         "ansi-styles": "^4.0.0",
         "string-width": "^4.1.0",
         "strip-ansi": "^6.0.0"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "5.0.0",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
-          "dev": true
-        },
-        "is-fullwidth-code-point": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
-          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-          "dev": true
-        },
-        "string-width": {
-          "version": "4.2.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.2.tgz",
-          "integrity": "sha512-XBJbT3N4JhVumXE0eoLU9DCjcaF92KLNqTmFCnG1pf8duUxFGwtP6AD6nkjw9a3IdiRtL3E2w3JDiE/xi3vOeA==",
-          "dev": true,
-          "requires": {
-            "emoji-regex": "^8.0.0",
-            "is-fullwidth-code-point": "^3.0.0",
-            "strip-ansi": "^6.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "6.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
-          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^5.0.0"
-          }
-        }
       }
     },
     "wrappy": {
@@ -755,40 +1755,6 @@
         "string-width": "^4.2.0",
         "y18n": "^5.0.5",
         "yargs-parser": "^20.2.2"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "5.0.0",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
-          "dev": true
-        },
-        "is-fullwidth-code-point": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
-          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-          "dev": true
-        },
-        "string-width": {
-          "version": "4.2.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.2.tgz",
-          "integrity": "sha512-XBJbT3N4JhVumXE0eoLU9DCjcaF92KLNqTmFCnG1pf8duUxFGwtP6AD6nkjw9a3IdiRtL3E2w3JDiE/xi3vOeA==",
-          "dev": true,
-          "requires": {
-            "emoji-regex": "^8.0.0",
-            "is-fullwidth-code-point": "^3.0.0",
-            "strip-ansi": "^6.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "6.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
-          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^5.0.0"
-          }
-        }
       }
     },
     "yargs-parser": {
diff --git a/package.json b/package.json
index 2bf2860..f5b7378 100644
--- a/package.json
+++ b/package.json
@@ -16,16 +16,16 @@
     "url": "git://github.com/octave-online/node-redis-scripto.git"
   },
   "engines": {
-    "node": ">= 0.8.x"
+    "node": ">= 12"
   },
   "scripts": {
     "test": "test/index.js"
   },
   "dependencies": {
-    "debug": "^4.3.2",
-    "redis": "^3.1.2"
+    "debug": "^4.3.3",
+    "ioredis": "^4.28.3"
   },
   "devDependencies": {
-    "mocha": "^9.0.3"
+    "mocha": "^9.1.3"
   }
 }
diff --git a/test/index.js b/test/index.js
index 1033b0f..4e55ebf 100755
--- a/test/index.js
+++ b/test/index.js
@@ -1,12 +1,12 @@
 #!/usr/bin/env node
- 
-var Mocha = require('mocha');
- 
-var mocha = new Mocha;
-mocha.reporter('spec').ui('tdd');
- 
-mocha.addFile('test/scripto.js');
- 
-var runner = mocha.run(function(){
-	process.exit(0);
-});
\ No newline at end of file
+
+const Mocha = require("mocha");
+
+const mocha = new Mocha();
+mocha.reporter("spec").ui("tdd");
+
+mocha.addFile("test/scripto.js");
+
+const runner = mocha.run(function () {
+  process.exit(0);
+});
diff --git a/test/scripto.js b/test/scripto.js
index 9efde23..1aa8ac8 100644
--- a/test/scripto.js
+++ b/test/scripto.js
@@ -1,145 +1,151 @@
-var path        = require('path');
-var assert      = require('assert');
-var redis       = require('redis');
-var Scripto     = require('../');
-
-var redisClient = redis.createClient();
-var scriptDir   = path.resolve(path.dirname(__filename), 'scripts');
-
-suite('Scripto', function() {
-
-    suite('eval', function() {
-
-        test('running normally', _clean(function(done) {
-            
-            var s = new Scripto(redisClient);
-            s.loadFromDir(scriptDir);
-            s.eval('read-write', ['helloKey'], [200], function(err, result) {
-
-                assert.equal(err, null);
-                assert.equal(result, 200);
-                done();
-            });
-        }));
-
-        test('running non-existing script', _clean(function(done) {
-            
-            var s = new Scripto(redisClient);
-            s.loadFromDir(scriptDir);
-            s.eval('no-such-script', ['helloKey'], [200], function(err, result) {
-
-                assert.equal(err.message, 'NO_SUCH_SCRIPT');
-                assert.equal(result, undefined);
-                done();
-            });
-        }));
-    });
+const path = require("path");
+const assert = require("assert");
+const Redis = require("ioredis");
+const Scripto = require("../");
 
-    suite('evalSha', function() {
-
-        test('failed at initial call', _clean(function(done) {
-            
-            var s = new Scripto(redisClient);
-            s.loadFromDir(scriptDir);
-            s.evalSha('read-write', ['helloKey'], [200], function(err, result) {
-
-                assert.equal(err.message, 'NO_SUCH_SCRIPT_SHA');
-                assert.equal(result, undefined);
-                done();
-            });
-        }));
-
-        test('success at runs after script loaded (some millis later)', _clean(function(done) {
-            
-            var s = new Scripto(redisClient);
-            s.loadFromDir(scriptDir);
-
-            setTimeout(function() {
-                
-                s.evalSha('read-write', ['hello2Key'], [300], afterEvalSha);
-            }, 100);
-
-            function afterEvalSha(err, result) {
-
-                assert.equal(err, undefined);
-                assert.equal(result, 300);
-                done();
-            }
-        }));
-    });
+const scriptDir = path.resolve(path.dirname(__filename), "scripts");
+
+const redisClient = new Redis({ lazyConnect: true });
 
-    suite('run', function() {
-
-        test('success at initial call', _clean(function(done) {
-            
-            var s = new Scripto(redisClient);
-            s.loadFromDir(scriptDir);
-            s.run('read-write', ['helloKey'], [200], function(err, result) {
-
-                assert.equal(err, undefined);
-                assert.equal(result, 200);
-                done();
-            });
-        }));
-
-        test('success at runs after script loaded (some millis later, then uses sha)', _clean(function(done) {
-            
-            var s = new Scripto(redisClient);
-            s.loadFromDir(scriptDir);
-
-            setTimeout(function() {
-                
-                s.run('read-write', ['hello2Key'], [300], afterEvalSha);
-            }, 100);
-
-            function afterEvalSha(err, result) {
-
-                assert.equal(err, undefined);
-                assert.equal(result, 300);
-                done();
-            }
-        }));
+describe("Scripto", function () {
+  before(function (done) {
+    redisClient.connect(function (err) {
+      done();
+    });
+  });
+  after(function (done) {
+    redisClient.disconnect();
+    done();
+  });
+
+  afterEach(function (done) {
+    redisClient.flushdb(function (err, res) {
+      if (err) return done(err);
+      done();
+    });
+  });
+
+  describe("Env working", function () {
+    it("ping", function (done) {
+      redisClient.ping(function (err, result) {
+        console.log(`redis ping ${JSON.stringify(result)}`);
+        assert.equal(err, null);
+        assert.equal(result, "PONG");
+        done();
+      });
+    });
+  });
+  describe("eval", function () {
+    it("running normally", function (done) {
+      const s = new Scripto(redisClient);
+      s.loadFromDir(scriptDir);
+      s.eval("read-write", ["helloKey"], [200], function (err, result) {
+        assert.equal(err, null);
+        assert.equal(result, 200);
+        done();
+      });
     });
 
-    test('load scripts from an object', _clean(function(done) {
+    it("running non-existing script", function (done) {
+      const s = new Scripto(redisClient);
+      s.loadFromDir(scriptDir);
+      s.eval("no-such-script", ["helloKey"], [200], function (err, result) {
+        assert.equal(err.message, "NO_SUCH_SCRIPT");
+        assert.equal(result, undefined);
+        done();
+      });
+    });
+  });
+
+  describe("evalSha", function () {
+    it("failed at initial call", function (done) {
+      const s = new Scripto(redisClient);
+      s.loadFromDir(scriptDir);
+      s.evalSha("read-write", ["helloKey"], [200], function (err, result) {
+        assert.equal(err.message, "NO_SUCH_SCRIPT_SHA");
+        assert.equal(result, undefined);
+        done();
+      });
+    });
 
-        var scripts = { 'script-one': 'return 1000;' };
-        var s = new Scripto(redisClient);
-        s.load(scripts);
+    it("success at runs after script loaded (some millis later)", function (done) {
+      const s = new Scripto(redisClient);
+      s.loadFromDir(scriptDir);
 
-        s.run('script-one', [], [], function(err, result) {
+      setTimeout(function () {
+        s.evalSha("read-write", ["hello2Key"], [300], afterEvalSha);
+      }, 100);
 
-            assert.equal(err, null);
-            assert.equal(result, 1000);
-            done();
-        });
+      function afterEvalSha(err, result) {
+        assert.equal(err, undefined);
+        assert.equal(result, 300);
+        done();
+      }
+    });
+  });
+
+  describe("run", function () {
+    it("success at initial call", function (done) {
+      const s = new Scripto(redisClient);
+      s.loadFromDir(scriptDir);
+      s.run("read-write", ["helloKey"], [200], function (err, result) {
+        assert.equal(err, undefined);
+        assert.equal(result, 200);
+        done();
+      });
+    });
 
-    }));
+    it("success at runs after script loaded (some millis later, then uses sha)", function (done) {
+      const s = new Scripto(redisClient);
+      s.loadFromDir(scriptDir);
 
-    test('load a script from file', _clean(function(done) {
+      setTimeout(function () {
+        s.run("read-write", ["hello2Key"], [300], afterEvalSha);
+      }, 100);
 
-        var s = new Scripto(redisClient);
-        s.loadFromFile('read-write', path.resolve(scriptDir, 'read-write.lua'));
+      function afterEvalSha(err, result) {
+        assert.equal(err, undefined);
+        assert.equal(result, 300);
+        done();
+      }
+    });
+  });
 
-        s.run('read-write', ['helloKey'], [200], function(err, result) {
+  it("load scripts from an object", function (done) {
+    const scripts = { "script-one": "return 1000;" };
+    const s = new Scripto(redisClient);
+    s.load(scripts);
 
-            assert.equal(err, null);
-            assert.equal(result, 200);
-            done();
-        });
+    s.run("script-one", [], [], function (err, result) {
+      assert.equal(err, null);
+      assert.equal(result, 1000);
+      done();
+    });
+  });
 
-    }));
+  it("load a script from file", function (done) {
+    const s = new Scripto(redisClient);
+    s.loadFromFile("read-write", path.resolve(scriptDir, "read-write.lua"));
 
+    s.run("read-write", ["helloKey"], [200], function (err, result) {
+      assert.equal(err, null);
+      assert.equal(result, 200);
+      done();
+    });
+  });
+
+  it("load a script from dir", function (done) {
+    const s = new Scripto(redisClient);
+    s.loadFromDir(path.resolve(scriptDir));
+
+    s.run("read-write", ["helloKey"], [200], function (err, result) {
+      assert.equal(err, null);
+      assert.equal(result, 200);
+      s.run("read-write-copy", ["helloKey"], [200], function (err, result) {
+        assert.equal(err, null);
+        assert.equal(result, 200);
+        done();
+      });
+    });
+  });
 });
-
-function _clean(callback) {
-
-    return function(done) {
-
-        redisClient.flushdb(function(err) {
-
-            if(err) throw err;
-            callback(done);
-        });
-    };
-}
\ No newline at end of file