diff --git a/dev/build.js b/dev/build.js
index 6afb82ae..b76a769b 100644
--- a/dev/build.js
+++ b/dev/build.js
@@ -19,8 +19,8 @@ const fs = require('fs');
 const path = require('path');
 const readline = require('readline');
 const childProcess = require('child_process');
-const util = require('./yomichan-util');
-const {getAllFiles, getDefaultManifestAndVariants, createManifestString} = util;
+const util = require('./util');
+const {getAllFiles, getDefaultManifestAndVariants, createManifestString, getArgs} = util;
 
 
 function clone(value) {
@@ -208,54 +208,10 @@ async function build(manifest, buildDir, extDir, manifestPath, variantMap, varia
     }
 }
 
-function getArs(args, argMap) {
-    let key = null;
-    let canKey = true;
-    let onKey = false;
-    for (const arg of args) {
-        onKey = false;
-
-        if (canKey && arg.startsWith('--')) {
-            if (arg.length === 2) {
-                canKey = false;
-                key = null;
-                onKey = false;
-            } else {
-                key = arg.substring(2);
-                onKey = true;
-            }
-        }
-
-        const target = argMap.get(key);
-        if (typeof target === 'boolean') {
-            argMap.set(key, true);
-            key = null;
-        } else if (typeof target === 'number') {
-            argMap.set(key, target + 1);
-            key = null;
-        } else if (target === null || typeof target === 'string') {
-            if (!onKey) {
-                argMap.set(key, arg);
-                key = null;
-            }
-        } else if (Array.isArray(target)) {
-            if (!onKey) {
-                target.push(arg);
-                key = null;
-            }
-        } else {
-            console.error(`Unknown argument: ${arg}`);
-            key = null;
-        }
-    }
-
-    return argMap;
-}
-
 
 async function main() {
     const argv = process.argv.slice(2);
-    const args = getArs(argv, new Map([
+    const args = getArgs(argv, new Map([
         ['all', false],
         ['default', false],
         ['manifest', null],
diff --git a/test/dictionary-validate.js b/dev/dictionary-validate.js
similarity index 97%
rename from test/dictionary-validate.js
rename to dev/dictionary-validate.js
index a669a542..cf449b09 100644
--- a/test/dictionary-validate.js
+++ b/dev/dictionary-validate.js
@@ -17,8 +17,8 @@
 
 const fs = require('fs');
 const path = require('path');
-const {JSZip} = require('../dev/yomichan-util');
-const {VM} = require('./yomichan-vm');
+const {JSZip} = require('./util');
+const {VM} = require('./vm');
 
 const vm = new VM();
 vm.execute([
diff --git a/test/lint/global-declarations.js b/dev/lint/global-declarations.js
similarity index 98%
rename from test/lint/global-declarations.js
rename to dev/lint/global-declarations.js
index 355cb64a..5448df85 100644
--- a/test/lint/global-declarations.js
+++ b/dev/lint/global-declarations.js
@@ -19,7 +19,7 @@
 const fs = require('fs');
 const path = require('path');
 const assert = require('assert');
-const {getAllFiles} = require('../../dev/yomichan-util');
+const {getAllFiles} = require('../util');
 
 
 function countOccurences(string, pattern) {
diff --git a/test/schema-validate.js b/dev/schema-validate.js
similarity index 97%
rename from test/schema-validate.js
rename to dev/schema-validate.js
index 7b7a21a6..7b6bb5e7 100644
--- a/test/schema-validate.js
+++ b/dev/schema-validate.js
@@ -16,7 +16,7 @@
  */
 
 const fs = require('fs');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('./vm');
 
 const vm = new VM();
 vm.execute([
diff --git a/dev/yomichan-util.js b/dev/util.js
similarity index 55%
rename from dev/yomichan-util.js
rename to dev/util.js
index 2d8f31ea..971837af 100644
--- a/dev/yomichan-util.js
+++ b/dev/util.js
@@ -32,6 +32,50 @@ function getJSZip() {
 }
 
 
+function getArgs(args, argMap) {
+    let key = null;
+    let canKey = true;
+    let onKey = false;
+    for (const arg of args) {
+        onKey = false;
+
+        if (canKey && arg.startsWith('--')) {
+            if (arg.length === 2) {
+                canKey = false;
+                key = null;
+                onKey = false;
+            } else {
+                key = arg.substring(2);
+                onKey = true;
+            }
+        }
+
+        const target = argMap.get(key);
+        if (typeof target === 'boolean') {
+            argMap.set(key, true);
+            key = null;
+        } else if (typeof target === 'number') {
+            argMap.set(key, target + 1);
+            key = null;
+        } else if (target === null || typeof target === 'string') {
+            if (!onKey) {
+                argMap.set(key, arg);
+                key = null;
+            }
+        } else if (Array.isArray(target)) {
+            if (!onKey) {
+                target.push(arg);
+                key = null;
+            }
+        } else {
+            console.error(`Unknown argument: ${arg}`);
+            key = null;
+        }
+    }
+
+    return argMap;
+}
+
 function getAllFiles(baseDirectory, relativeTo=null, predicate=null) {
     const results = [];
     const directories = [baseDirectory];
@@ -69,11 +113,36 @@ function createManifestString(manifest) {
     return JSON.stringify(manifest, null, 4) + '\n';
 }
 
+function createDictionaryArchive(dictionaryDirectory, dictionaryName) {
+    const fileNames = fs.readdirSync(dictionaryDirectory);
+
+    const JSZip2 = getJSZip();
+    const archive = new JSZip2();
+
+    for (const fileName of fileNames) {
+        if (/\.json$/.test(fileName)) {
+            const content = fs.readFileSync(path.join(dictionaryDirectory, fileName), {encoding: 'utf8'});
+            const json = JSON.parse(content);
+            if (fileName === 'index.json' && typeof dictionaryName === 'string') {
+                json.title = dictionaryName;
+            }
+            archive.file(fileName, JSON.stringify(json, null, 0));
+        } else {
+            const content = fs.readFileSync(path.join(dictionaryDirectory, fileName), {encoding: null});
+            archive.file(fileName, content);
+        }
+    }
+
+    return archive;
+}
+
 
 module.exports = {
     get JSZip() { return getJSZip(); },
+    getArgs,
     getAllFiles,
     getDefaultManifest,
     getDefaultManifestAndVariants,
-    createManifestString
+    createManifestString,
+    createDictionaryArchive
 };
diff --git a/test/yomichan-vm.js b/dev/vm.js
similarity index 100%
rename from test/yomichan-vm.js
rename to dev/vm.js
diff --git a/package.json b/package.json
index d276d701..7ba23ff5 100644
--- a/package.json
+++ b/package.json
@@ -8,8 +8,8 @@
     "scripts": {
         "build": "node ./dev/build.js",
         "test": "npm run test-lint && npm run test-code && npm run test-manifest",
-        "test-lint": "eslint . && node ./test/lint/global-declarations.js",
-        "test-code": "node ./test/test-schema.js && node ./test/test-dictionary.js && node ./test/test-database.js && node ./test/test-document-util.js && node ./test/test-object-property-accessor.js && node ./test/test-japanese.js && node ./test/test-text-source-map.js && node ./test/test-dom-text-scanner.js && node ./test/test-cache-map.js && node ./test/test-profile-conditions.js && node ./test/test-core.js",
+        "test-lint": "eslint . && node ./dev/lint/global-declarations.js",
+        "test-code": "node ./test/test-all.js ./test --skip ./test/test-manifest.js",
         "test-manifest": "node ./test/test-manifest.js"
     },
     "repository": {
diff --git a/test/test-all.js b/test/test-all.js
new file mode 100644
index 00000000..71261408
--- /dev/null
+++ b/test/test-all.js
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2020  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const {spawnSync} = require('child_process');
+const {getArgs} = require('../dev/util');
+
+
+function main() {
+    const args = getArgs(process.argv.slice(2), new Map([
+        ['skip', []],
+        [null, []]
+    ]));
+    const directories = args.get(null);
+    const skip = new Set([__filename, ...args.get('skip')].map((value) => path.resolve(value)));
+
+    const node = process.execPath;
+    const fileNamePattern = /\.js$/i;
+
+    let first = true;
+    for (const directory of directories) {
+        const fileNames = fs.readdirSync(directory);
+        for (const fileName of fileNames) {
+            if (!fileNamePattern.test(fileName)) { continue; }
+
+            const fullFileName = path.resolve(path.join(directory, fileName));
+            if (skip.has(fullFileName)) { continue; }
+
+            const stats = fs.lstatSync(fullFileName);
+            if (!stats.isFile()) { continue; }
+
+            process.stdout.write(`${first ? '' : '\n'}Running ${fileName}...\n`);
+            first = false;
+
+            const {error, status} = spawnSync(node, [fileName], {cwd: directory, stdio: 'inherit'});
+
+            if (status !== null && status !== 0) {
+                process.exit(status);
+                return;
+            }
+            if (error) {
+                throw error;
+            }
+        }
+    }
+
+    process.exit(0);
+}
+
+
+if (require.main === module) { main(); }
diff --git a/test/test-cache-map.js b/test/test-cache-map.js
index 00383e65..9307dd2c 100644
--- a/test/test-cache-map.js
+++ b/test/test-cache-map.js
@@ -16,7 +16,7 @@
  */
 
 const assert = require('assert');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 const vm = new VM({console});
 vm.execute([
diff --git a/test/test-core.js b/test/test-core.js
index d4a880d1..b5c0683f 100644
--- a/test/test-core.js
+++ b/test/test-core.js
@@ -17,7 +17,7 @@
 
 const assert = require('assert');
 const crypto = require('crypto');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 const vm = new VM({
     crypto: {
diff --git a/test/test-database.js b/test/test-database.js
index df152e57..dce89559 100644
--- a/test/test-database.js
+++ b/test/test-database.js
@@ -19,9 +19,8 @@ const fs = require('fs');
 const url = require('url');
 const path = require('path');
 const assert = require('assert');
-const {JSZip} = require('../dev/yomichan-util');
-const {createTestDictionaryArchive} = require('./yomichan-test');
-const {VM} = require('./yomichan-vm');
+const {JSZip, createDictionaryArchive} = require('../dev/util');
+const {VM} = require('../dev/vm');
 require('fake-indexeddb/auto');
 
 const chrome = {
@@ -125,6 +124,12 @@ const DictionaryImporter = vm.get('DictionaryImporter');
 const DictionaryDatabase = vm.get('DictionaryDatabase');
 
 
+function createTestDictionaryArchive(dictionary, dictionaryName) {
+    const dictionaryDirectory = path.join(__dirname, 'data', 'dictionaries', dictionary);
+    return createDictionaryArchive(dictionaryDirectory, dictionaryName);
+}
+
+
 function countTermsWithExpression(terms, expression) {
     return terms.reduce((i, v) => (i + (v.expression === expression ? 1 : 0)), 0);
 }
diff --git a/test/test-dictionary.js b/test/test-dictionary.js
index 2ca0c652..e7db75eb 100644
--- a/test/test-dictionary.js
+++ b/test/test-dictionary.js
@@ -15,8 +15,15 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-const {createTestDictionaryArchive} = require('./yomichan-test');
-const dictionaryValidate = require('./dictionary-validate');
+const path = require('path');
+const {createDictionaryArchive} = require('../dev/util');
+const dictionaryValidate = require('../dev/dictionary-validate');
+
+
+function createTestDictionaryArchive(dictionary, dictionaryName) {
+    const dictionaryDirectory = path.join(__dirname, 'data', 'dictionaries', dictionary);
+    return createDictionaryArchive(dictionaryDirectory, dictionaryName);
+}
 
 
 async function main() {
diff --git a/test/test-document-util.js b/test/test-document-util.js
index 4ff380ec..4489bdf1 100644
--- a/test/test-document-util.js
+++ b/test/test-document-util.js
@@ -19,7 +19,7 @@ const fs = require('fs');
 const path = require('path');
 const assert = require('assert');
 const {JSDOM} = require('jsdom');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 
 // DOMRect class definition
diff --git a/test/test-dom-text-scanner.js b/test/test-dom-text-scanner.js
index 7374ff87..b9ff6239 100644
--- a/test/test-dom-text-scanner.js
+++ b/test/test-dom-text-scanner.js
@@ -19,7 +19,7 @@ const fs = require('fs');
 const path = require('path');
 const assert = require('assert');
 const {JSDOM} = require('jsdom');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 
 function createJSDOM(fileName) {
diff --git a/test/test-japanese.js b/test/test-japanese.js
index 39004128..ad3084f1 100644
--- a/test/test-japanese.js
+++ b/test/test-japanese.js
@@ -16,7 +16,7 @@
  */
 
 const assert = require('assert');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 const vm = new VM();
 vm.execute([
diff --git a/test/test-manifest.js b/test/test-manifest.js
index 07889105..230e6139 100644
--- a/test/test-manifest.js
+++ b/test/test-manifest.js
@@ -18,7 +18,7 @@
 const fs = require('fs');
 const path = require('path');
 const assert = require('assert');
-const {getDefaultManifest, createManifestString} = require('../dev/yomichan-util');
+const {getDefaultManifest, createManifestString} = require('../dev/util');
 
 
 function loadManifestString() {
diff --git a/test/test-object-property-accessor.js b/test/test-object-property-accessor.js
index 1e694946..42fa3d40 100644
--- a/test/test-object-property-accessor.js
+++ b/test/test-object-property-accessor.js
@@ -16,7 +16,7 @@
  */
 
 const assert = require('assert');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 const vm = new VM({});
 vm.execute('mixed/js/object-property-accessor.js');
diff --git a/test/test-profile-conditions.js b/test/test-profile-conditions.js
index 23bbdacb..8ef24b5a 100644
--- a/test/test-profile-conditions.js
+++ b/test/test-profile-conditions.js
@@ -16,7 +16,7 @@
  */
 
 const assert = require('assert');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 
 const vm = new VM({});
diff --git a/test/test-schema.js b/test/test-schema.js
index a4a0de2e..a79650d6 100644
--- a/test/test-schema.js
+++ b/test/test-schema.js
@@ -16,7 +16,7 @@
  */
 
 const assert = require('assert');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 const vm = new VM();
 vm.execute([
diff --git a/test/test-text-source-map.js b/test/test-text-source-map.js
index f092de2c..c9810d19 100644
--- a/test/test-text-source-map.js
+++ b/test/test-text-source-map.js
@@ -16,7 +16,7 @@
  */
 
 const assert = require('assert');
-const {VM} = require('./yomichan-vm');
+const {VM} = require('../dev/vm');
 
 const vm = new VM();
 vm.execute(['bg/js/text-source-map.js']);
diff --git a/test/yomichan-test.js b/test/yomichan-test.js
deleted file mode 100644
index af1ea2e3..00000000
--- a/test/yomichan-test.js
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2020  Yomichan Authors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-const fs = require('fs');
-const path = require('path');
-
-
-function createTestDictionaryArchive(dictionary, dictionaryName) {
-    const dictionaryDirectory = path.join(__dirname, 'data', 'dictionaries', dictionary);
-    const fileNames = fs.readdirSync(dictionaryDirectory);
-
-    const {JSZip} = require('../dev/yomichan-util');
-    const archive = new JSZip();
-
-    for (const fileName of fileNames) {
-        if (/\.json$/.test(fileName)) {
-            const content = fs.readFileSync(path.join(dictionaryDirectory, fileName), {encoding: 'utf8'});
-            const json = JSON.parse(content);
-            if (fileName === 'index.json' && typeof dictionaryName === 'string') {
-                json.title = dictionaryName;
-            }
-            archive.file(fileName, JSON.stringify(json, null, 0));
-        } else {
-            const content = fs.readFileSync(path.join(dictionaryDirectory, fileName), {encoding: null});
-            archive.file(fileName, content);
-        }
-    }
-
-    return archive;
-}
-
-
-module.exports = {
-    createTestDictionaryArchive
-};