diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000..97e615d
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,15 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  testMatch: ['**/tests/**/*.spec.ts'],
+  collectCoverageFrom: [
+    '<rootDir>/src/**/*.ts',
+    '!<rootDir>/src/types/**/*.ts',
+  ],
+  globals: {
+    'ts-jest': {
+      diagnostics: false,
+      isolatedModules: true,
+    },
+  },
+};
diff --git a/tsconfig.json b/tsconfig.json
index d13bdbb..739e9cf 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,7 +11,7 @@
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
 
     /* Language and Environment */
-    "target": "esnext",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "ES6",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
@@ -111,8 +111,6 @@
     "./types/**/*",
     "./src/**/*.js",
     "./src/**/*.ts",
-    "./test/**/*.ts",
-    "./test/**/*.js",
     "./tests/**/*.ts",
     "./tests/**/*.js"
   ],