diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..045bf06
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,23 @@
+name: test
+on:
+  pull_request:
+    branches:
+      - main
+jobs:
+  test:
+    runs-on: windows-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - name: install deps
+        run: npm install
+      - name: build
+        run: npm run build
+      - name: test/err
+        run: npm run test-errors
+      - name: test/err
+        run: npm run test-preview
diff --git a/package-lock.json b/package-lock.json
index ca1b520..ee51d70 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,12 +13,25 @@
       },
       "devDependencies": {
         "@types/node": "^24.1.0",
-        "node-gyp": "^11.2.0"
+        "node-gyp": "^11.2.0",
+        "ts-node": "^10.9.2"
       },
       "engines": {
         "node": ">=14.0.0"
       }
     },
+    "node_modules/@cspotcode/source-map-support": {
+      "version": "0.8.1",
+      "resolved": "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz",
+      "integrity": "sha512-IchNf6dN4tHoMFIn/7OE8LWZ19Y6q/67Bmf6vnGREv8RSbBVb9LPJxEcnwrcwX6ixSvaiGoomAUvu4YSxXrVgw==",
+      "dev": true,
+      "dependencies": {
+        "@jridgewell/trace-mapping": "0.3.9"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/@isaacs/cliui": {
       "version": "8.0.2",
       "resolved": "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz",
@@ -50,6 +63,31 @@
         "node": ">=18.0.0"
       }
     },
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
+      "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
+      "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
+      "dev": true
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.9",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.9.tgz",
+      "integrity": "sha512-3Belt6tdc8bPgAtbcmdtNJlirVoTmEb5e2gC94PnkwEW9jI6CAHUeoG85tjWP5WquqfavoMtMwiG4P926ZKKuQ==",
+      "dev": true,
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.0.3",
+        "@jridgewell/sourcemap-codec": "^1.4.10"
+      }
+    },
     "node_modules/@npmcli/agent": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/@npmcli/agent/-/agent-3.0.0.tgz",
@@ -91,6 +129,30 @@
         "node": ">=14"
       }
     },
+    "node_modules/@tsconfig/node10": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node10/-/node10-1.0.11.tgz",
+      "integrity": "sha512-DcRjDCujK/kCk/cUe8Xz8ZSpm8mS3mNNpta+jGCA6USEDfktlNvm1+IuZ9eTcDbNk41BHwpHHeW+N1lKCz4zOw==",
+      "dev": true
+    },
+    "node_modules/@tsconfig/node12": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node12/-/node12-1.0.11.tgz",
+      "integrity": "sha512-cqefuRsh12pWyGsIoBKJA9luFu3mRxCA+ORZvA4ktLSzIuCUtWVxGIuXigEwO5/ywWFMZ2QEGKWvkZG1zDMTag==",
+      "dev": true
+    },
+    "node_modules/@tsconfig/node14": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node14/-/node14-1.0.3.tgz",
+      "integrity": "sha512-ysT8mhdixWK6Hw3i1V2AeRqZ5WfXg1G43mqoYlM2nc6388Fq5jcXyr5mRsqViLx/GJYdoL0bfXD8nmF+Zn/Iow==",
+      "dev": true
+    },
+    "node_modules/@tsconfig/node16": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node16/-/node16-1.0.4.tgz",
+      "integrity": "sha512-vxhUy4J8lyeyinH7Azl1pdd43GJhZH/tP2weN8TntQblOY+A0XbT8DJk1/oCPuOOyg/Ja757rG0CgHcWC8OfMA==",
+      "dev": true
+    },
     "node_modules/@types/node": {
       "version": "24.1.0",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-24.1.0.tgz",
@@ -111,6 +173,30 @@
         "node": "^18.17.0 || >=20.5.0"
       }
     },
+    "node_modules/acorn": {
+      "version": "8.15.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
+      "integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
+      "dev": true,
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "node_modules/acorn-walk": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.3.4.tgz",
+      "integrity": "sha512-ueEepnujpqee2o5aIYnvHU6C0A42MNdsIDeqy5BydrkuC5R1ZuUFnm27EeFJGoEHJQgn3uleRvmTXaJgfXbt4g==",
+      "dev": true,
+      "dependencies": {
+        "acorn": "^8.11.0"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/agent-base": {
       "version": "7.1.4",
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
@@ -147,6 +233,12 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
+    "node_modules/arg": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
+      "integrity": "sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==",
+      "dev": true
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -218,6 +310,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/create-require": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/create-require/-/create-require-1.1.1.tgz",
+      "integrity": "sha512-dcKFX3jn0MpIaXjisoRvexIJVEKzaq7z2rZKxf+MSr9TkdmHmsU4m2lcLojrj/FHl8mk5VxMmYA+ftRkP/3oKQ==",
+      "dev": true
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -274,6 +372,15 @@
         }
       }
     },
+    "node_modules/diff": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
+      "integrity": "sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.3.1"
+      }
+    },
     "node_modules/eastasianwidth": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/eastasianwidth/-/eastasianwidth-0.2.0.tgz",
@@ -519,6 +626,12 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/make-error": {
+      "version": "1.3.6",
+      "resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.6.tgz",
+      "integrity": "sha512-s8UhlNe7vPKomQhC1qFelMokr/Sc3AgNbso3n74mVPA5LTZwkB9NlXf4XPamLxJE8h0gh73rM94xvwRT2CVInw==",
+      "dev": true
+    },
     "node_modules/make-fetch-happen": {
       "version": "14.0.3",
       "resolved": "https://registry.npmjs.org/make-fetch-happen/-/make-fetch-happen-14.0.3.tgz",
@@ -1145,6 +1258,63 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/ts-node": {
+      "version": "10.9.2",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-10.9.2.tgz",
+      "integrity": "sha512-f0FFpIdcHgn8zcPSbf1dRevwt047YMnaiJM3u2w2RewrB+fob/zePZcrOyQoLMMO7aBIddLcQIEK5dYjkLnGrQ==",
+      "dev": true,
+      "dependencies": {
+        "@cspotcode/source-map-support": "^0.8.0",
+        "@tsconfig/node10": "^1.0.7",
+        "@tsconfig/node12": "^1.0.7",
+        "@tsconfig/node14": "^1.0.0",
+        "@tsconfig/node16": "^1.0.2",
+        "acorn": "^8.4.1",
+        "acorn-walk": "^8.1.1",
+        "arg": "^4.1.0",
+        "create-require": "^1.1.0",
+        "diff": "^4.0.1",
+        "make-error": "^1.1.1",
+        "v8-compile-cache-lib": "^3.0.1",
+        "yn": "3.1.1"
+      },
+      "bin": {
+        "ts-node": "dist/bin.js",
+        "ts-node-cwd": "dist/bin-cwd.js",
+        "ts-node-esm": "dist/bin-esm.js",
+        "ts-node-script": "dist/bin-script.js",
+        "ts-node-transpile-only": "dist/bin-transpile.js",
+        "ts-script": "dist/bin-script-deprecated.js"
+      },
+      "peerDependencies": {
+        "@swc/core": ">=1.2.50",
+        "@swc/wasm": ">=1.2.50",
+        "@types/node": "*",
+        "typescript": ">=2.7"
+      },
+      "peerDependenciesMeta": {
+        "@swc/core": {
+          "optional": true
+        },
+        "@swc/wasm": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/typescript": {
+      "version": "5.9.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
+      "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
+      "dev": true,
+      "peer": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/undici-types": {
       "version": "7.8.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.8.0.tgz",
@@ -1178,6 +1348,12 @@
         "node": "^18.17.0 || >=20.5.0"
       }
     },
+    "node_modules/v8-compile-cache-lib": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",
+      "integrity": "sha512-wa7YjyUGfNZngI/vtK0UHAN+lgDCxBPCylVXGp0zu59Fz5aiGtNXaq3DhIov063MorB+VfufLh3JlF2KdTK3xg==",
+      "dev": true
+    },
     "node_modules/which": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/which/-/which-5.0.0.tgz",
@@ -1301,6 +1477,15 @@
       "engines": {
         "node": ">=18"
       }
+    },
+    "node_modules/yn": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 3b41b25..15dd3f9 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,8 @@
   },
   "scripts": {
     "build": "node-gyp rebuild && node dist.js",
+    "test-errors": "ts-node --project test/tsconfig.json test/errors.ts",
+    "test-preview": "ts-node --project test/tsconfig.json test/preview.ts",
     "configure-cursor-anysphere": "node-gyp configure -- -f compile_commands_json && copy build\\Release\\compile_commands.json src\\compile_commands.json"
   },
   "files": [
@@ -24,7 +26,8 @@
   "license": "LGPL-2.0",
   "devDependencies": {
     "@types/node": "^24.1.0",
-    "node-gyp": "^11.2.0"
+    "node-gyp": "^11.2.0",
+    "ts-node": "^10.9.2"
   },
   "dependencies": {
     "node-addon-api": "^8.4.0"
diff --git a/test/errors.js b/test/errors.ts
similarity index 85%
rename from test/errors.js
rename to test/errors.ts
index 0bc76e5..db8af6c 100644
--- a/test/errors.js
+++ b/test/errors.ts
@@ -1,11 +1,11 @@
-const noobs = require('../index.js');
+import noobs from '../index.js';
 const assert = require('assert');
 
 async function test() {
   let errMsg = '';
   try {
     noobs.GetSourceSettings('Test Source');
-  } catch (e) {
+  } catch (e: any) {
     errMsg = e.message;
   }
   assert.equal(errMsg, 'Obs not initialized');
diff --git a/test/preview.js b/test/preview.ts
similarity index 93%
rename from test/preview.js
rename to test/preview.ts
index 4a96892..36210b5 100644
--- a/test/preview.js
+++ b/test/preview.ts
@@ -1,4 +1,4 @@
-const noobs = require('../index.js');
+import noobs from '../index.js';
 const path = require('path');
 
 async function test() {
@@ -19,7 +19,7 @@ async function test() {
   // noobs.InitPreview(null); // Pass null for now, as we don't have a HWND yet.
   // noobs.ShowPreview(0, 0, 800, 600); // Show the preview at 800x600.
   const s = noobs.GetPreviewInfo();
-  console.log("info:", s);
+  console.log('info:', s);
 
   noobs.Shutdown();
   console.log('Test Done');
diff --git a/test/tsconfig.json b/test/tsconfig.json
new file mode 100644
index 0000000..36dfc64
--- /dev/null
+++ b/test/tsconfig.json
@@ -0,0 +1,10 @@
+{
+    "compilerOptions": {
+      "esModuleInterop": true,
+      "noImplicitAny": true,
+      "noEmit": true,
+      "strict": true,
+    },
+    "include": ["*.ts", "../index.d.ts"]
+  }
+  
\ No newline at end of file