diff --git a/test.js b/tests/browser.js
similarity index 100%
rename from test.js
rename to tests/browser.js
diff --git a/tests/index.js b/tests/index.js
new file mode 100644
index 0000000..86f5731
--- /dev/null
+++ b/tests/index.js
@@ -0,0 +1,109 @@
+"use strict";
+
+let ChildProcess = require("child_process");
+let Fs = require("node:fs/promises");
+let Path = require("node:path");
+
+async function main() {
+  console.info("TAP version 13");
+
+  let dirents = await Fs.readdir(__dirname, { withFileTypes: true });
+
+  let failures = 0;
+  let count = 0;
+  for (let dirent of dirents) {
+    if (dirent.name === "index.js") {
+      continue;
+    }
+
+    count += 1;
+    let direntPath = Path.join(__dirname, dirent.name);
+    let relPath = Path.relative(".", direntPath);
+
+    let success = await handleEach(count, relPath);
+    if (!success) {
+      failures += 1;
+    }
+  }
+
+  let start = 1;
+  if (count < 1) {
+    start = 0;
+  }
+
+  let passes = count - failures;
+  console.info(``);
+  console.info(`${start}..${count}`);
+  console.info(`# tests ${count}`);
+  console.info(`# pass  ${passes}`);
+  console.info(`# fail  ${failures}`);
+  console.info(`# skip  0`);
+
+  if (failures !== 0) {
+    process.exit(1);
+  }
+}
+
+async function handleEach(count, relPath) {
+  let success = await exec("node", [relPath])
+    .then(function (result) {
+      console.info(`ok ${count} - ${relPath}`);
+      return true;
+    })
+    .catch(function (err) {
+      console.info(`not ok ${count} - ${relPath}`);
+      if (err.code) {
+        console.info(`  # Error: ${err.code}`);
+      }
+      if (err.stderr) {
+        console.info(`  # Stderr: ${err.stderr}`);
+      }
+      return false;
+    });
+
+  return success;
+}
+
+async function exec(exe, args) {
+  return new Promise(function (resolve, reject) {
+    let cmd = ChildProcess.spawn(exe, args);
+
+    let stdout = [];
+    let stderr = [];
+
+    cmd.stdout.on("data", function (data) {
+      stdout.push(data.toString("utf8"));
+    });
+
+    cmd.stderr.on("data", function (data) {
+      stderr.push(data.toString("utf8"));
+    });
+
+    cmd.on("close", function (code) {
+      let result = {
+        code: code,
+        stdout: stdout.join(""),
+        stderr: stderr.join(""),
+      };
+
+      if (!code) {
+        resolve(result);
+        return;
+      }
+
+      let err = new Error(result.stderr);
+      Object.assign(err, result);
+      reject(err);
+    });
+  });
+}
+
+main()
+  .then(function () {
+    process.exit(0);
+  })
+  .catch(function (err) {
+    console.error("Fail:");
+    console.error(err.stack || err);
+    process.exit(1);
+  });