diff --git a/index.js b/index.js
index 7a7211e8..288ce9a8 100644
--- a/index.js
+++ b/index.js
@@ -1,181 +1,3 @@
 'use strict';
 
-var defined = require('defined');
-var createDefaultStream = require('./lib/default_stream');
-var Test = require('./lib/test');
-var createResult = require('./lib/results');
-var through = require('@ljharb/through');
-
-var canEmitExit = typeof process !== 'undefined' && process
-	&& typeof process.on === 'function' && process.browser !== true;
-var canExit = typeof process !== 'undefined' && process
-	&& typeof process.exit === 'function';
-
-module.exports = (function () {
-	var wait = false;
-	var harness;
-
-	function getHarness(opts) {
-		if (!opts) { opts = {}; }
-		opts.autoclose = !canEmitExit;
-		// this override is here since tests fail via nyc if createHarness is moved upwards
-		// eslint-disable-next-line no-use-before-define
-		if (!harness) { harness = createExitHarness(opts, wait); }
-		return harness;
-	}
-
-	function lazyLoad() {
-		// eslint-disable-next-line no-invalid-this
-		return getHarness().apply(this, arguments);
-	}
-
-	lazyLoad.wait = function () {
-		wait = true;
-	};
-
-	lazyLoad.run = function () {
-		var run = getHarness().run;
-
-		if (run) { run(); }
-	};
-
-	lazyLoad.only = function () {
-		return getHarness().only.apply(this, arguments);
-	};
-
-	lazyLoad.createStream = function (opts) {
-		var options = opts || {};
-		if (!harness) {
-			var output = through();
-			getHarness({ stream: output, objectMode: options.objectMode });
-			return output;
-		}
-		return harness.createStream(options);
-	};
-
-	lazyLoad.onFinish = function () {
-		return getHarness().onFinish.apply(this, arguments);
-	};
-
-	lazyLoad.onFailure = function () {
-		return getHarness().onFailure.apply(this, arguments);
-	};
-
-	lazyLoad.getHarness = getHarness;
-
-	return lazyLoad;
-}());
-
-function createHarness(conf_) {
-	var results = createResult();
-	if (!conf_ || conf_.autoclose !== false) {
-		results.once('done', function () { results.close(); });
-	}
-
-	function test(name, conf, cb) {
-		var t = new Test(name, conf, cb);
-		test._tests.push(t);
-
-		(function inspectCode(st) {
-			st.on('test', function sub(st_) {
-				inspectCode(st_);
-			});
-			st.on('result', function (r) {
-				if (!r.todo && !r.ok && typeof r !== 'string') { test._exitCode = 1; }
-			});
-		}(t));
-
-		results.push(t);
-		return t;
-	}
-	test._results = results;
-
-	test._tests = [];
-
-	test.createStream = function (opts) {
-		return results.createStream(opts);
-	};
-
-	test.onFinish = function (cb) {
-		results.on('done', cb);
-	};
-
-	test.onFailure = function (cb) {
-		results.on('fail', cb);
-	};
-
-	var only = false;
-	test.only = function () {
-		if (only) { throw new Error('there can only be one only test'); }
-		if (conf_.noOnly) { throw new Error('`only` tests are prohibited'); }
-		only = true;
-		var t = test.apply(null, arguments);
-		results.only(t);
-		return t;
-	};
-	test._exitCode = 0;
-
-	test.close = function () { results.close(); };
-
-	return test;
-}
-
-function createExitHarness(conf, wait) {
-	var config = conf || {};
-	var harness = createHarness({
-		autoclose: defined(config.autoclose, false),
-		noOnly: defined(conf.noOnly, defined(process.env.NODE_TAPE_NO_ONLY_TEST, false))
-	});
-	var running = false;
-	var ended = false;
-
-	function run() {
-		if (running) { return; }
-		running = true;
-		var stream = harness.createStream({ objectMode: config.objectMode });
-		var es = stream.pipe(config.stream || createDefaultStream());
-		if (canEmitExit && es) { // in node v0.4, `es` is `undefined`
-			// TODO: use `err` arg?
-			// eslint-disable-next-line no-unused-vars
-			es.on('error', function (err) { harness._exitCode = 1; });
-		}
-		stream.on('end', function () { ended = true; });
-	}
-
-	if (wait) {
-		harness.run = run;
-	} else {
-		run();
-	}
-
-	if (config.exit === false) { return harness; }
-	if (!canEmitExit || !canExit) { return harness; }
-
-	process.on('exit', function (code) {
-		// let the process exit cleanly.
-		if (typeof code === 'number' && code !== 0) {
-			return;
-		}
-
-		if (!ended) {
-			var only = harness._results._only;
-			for (var i = 0; i < harness._tests.length; i++) {
-				var t = harness._tests[i];
-				if (!only || t === only) {
-					t._exit();
-				}
-			}
-		}
-		harness.close();
-
-		process.removeAllListeners('exit'); // necessary for node v0.6
-		process.exit(code || harness._exitCode); // eslint-disable-line no-process-exit
-	});
-
-	return harness;
-}
-
-module.exports.createHarness = createHarness;
-module.exports.Test = Test;
-module.exports.test = module.exports; // tap compat
-module.exports.test.skip = Test.skip;
+module.exports = require('./lib');
diff --git a/lib/index.js b/lib/index.js
new file mode 100644
index 00000000..7a7211e8
--- /dev/null
+++ b/lib/index.js
@@ -0,0 +1,181 @@
+'use strict';
+
+var defined = require('defined');
+var createDefaultStream = require('./lib/default_stream');
+var Test = require('./lib/test');
+var createResult = require('./lib/results');
+var through = require('@ljharb/through');
+
+var canEmitExit = typeof process !== 'undefined' && process
+	&& typeof process.on === 'function' && process.browser !== true;
+var canExit = typeof process !== 'undefined' && process
+	&& typeof process.exit === 'function';
+
+module.exports = (function () {
+	var wait = false;
+	var harness;
+
+	function getHarness(opts) {
+		if (!opts) { opts = {}; }
+		opts.autoclose = !canEmitExit;
+		// this override is here since tests fail via nyc if createHarness is moved upwards
+		// eslint-disable-next-line no-use-before-define
+		if (!harness) { harness = createExitHarness(opts, wait); }
+		return harness;
+	}
+
+	function lazyLoad() {
+		// eslint-disable-next-line no-invalid-this
+		return getHarness().apply(this, arguments);
+	}
+
+	lazyLoad.wait = function () {
+		wait = true;
+	};
+
+	lazyLoad.run = function () {
+		var run = getHarness().run;
+
+		if (run) { run(); }
+	};
+
+	lazyLoad.only = function () {
+		return getHarness().only.apply(this, arguments);
+	};
+
+	lazyLoad.createStream = function (opts) {
+		var options = opts || {};
+		if (!harness) {
+			var output = through();
+			getHarness({ stream: output, objectMode: options.objectMode });
+			return output;
+		}
+		return harness.createStream(options);
+	};
+
+	lazyLoad.onFinish = function () {
+		return getHarness().onFinish.apply(this, arguments);
+	};
+
+	lazyLoad.onFailure = function () {
+		return getHarness().onFailure.apply(this, arguments);
+	};
+
+	lazyLoad.getHarness = getHarness;
+
+	return lazyLoad;
+}());
+
+function createHarness(conf_) {
+	var results = createResult();
+	if (!conf_ || conf_.autoclose !== false) {
+		results.once('done', function () { results.close(); });
+	}
+
+	function test(name, conf, cb) {
+		var t = new Test(name, conf, cb);
+		test._tests.push(t);
+
+		(function inspectCode(st) {
+			st.on('test', function sub(st_) {
+				inspectCode(st_);
+			});
+			st.on('result', function (r) {
+				if (!r.todo && !r.ok && typeof r !== 'string') { test._exitCode = 1; }
+			});
+		}(t));
+
+		results.push(t);
+		return t;
+	}
+	test._results = results;
+
+	test._tests = [];
+
+	test.createStream = function (opts) {
+		return results.createStream(opts);
+	};
+
+	test.onFinish = function (cb) {
+		results.on('done', cb);
+	};
+
+	test.onFailure = function (cb) {
+		results.on('fail', cb);
+	};
+
+	var only = false;
+	test.only = function () {
+		if (only) { throw new Error('there can only be one only test'); }
+		if (conf_.noOnly) { throw new Error('`only` tests are prohibited'); }
+		only = true;
+		var t = test.apply(null, arguments);
+		results.only(t);
+		return t;
+	};
+	test._exitCode = 0;
+
+	test.close = function () { results.close(); };
+
+	return test;
+}
+
+function createExitHarness(conf, wait) {
+	var config = conf || {};
+	var harness = createHarness({
+		autoclose: defined(config.autoclose, false),
+		noOnly: defined(conf.noOnly, defined(process.env.NODE_TAPE_NO_ONLY_TEST, false))
+	});
+	var running = false;
+	var ended = false;
+
+	function run() {
+		if (running) { return; }
+		running = true;
+		var stream = harness.createStream({ objectMode: config.objectMode });
+		var es = stream.pipe(config.stream || createDefaultStream());
+		if (canEmitExit && es) { // in node v0.4, `es` is `undefined`
+			// TODO: use `err` arg?
+			// eslint-disable-next-line no-unused-vars
+			es.on('error', function (err) { harness._exitCode = 1; });
+		}
+		stream.on('end', function () { ended = true; });
+	}
+
+	if (wait) {
+		harness.run = run;
+	} else {
+		run();
+	}
+
+	if (config.exit === false) { return harness; }
+	if (!canEmitExit || !canExit) { return harness; }
+
+	process.on('exit', function (code) {
+		// let the process exit cleanly.
+		if (typeof code === 'number' && code !== 0) {
+			return;
+		}
+
+		if (!ended) {
+			var only = harness._results._only;
+			for (var i = 0; i < harness._tests.length; i++) {
+				var t = harness._tests[i];
+				if (!only || t === only) {
+					t._exit();
+				}
+			}
+		}
+		harness.close();
+
+		process.removeAllListeners('exit'); // necessary for node v0.6
+		process.exit(code || harness._exitCode); // eslint-disable-line no-process-exit
+	});
+
+	return harness;
+}
+
+module.exports.createHarness = createHarness;
+module.exports.Test = Test;
+module.exports.test = module.exports; // tap compat
+module.exports.test.skip = Test.skip;
diff --git a/lib/test.js b/lib/test.js
index 59f62d5c..377e68ec 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -483,6 +483,7 @@ Test.prototype._assert = function assert(ok, opts) {
 		var e = new Error('exception');
 		var err = $split(e.stack || '', '\n');
 		var tapeDir = __dirname + path.sep;
+		var index = path.sep + 'index.js';
 
 		for (var i = 0; i < err.length; i++) {
 			/*
@@ -549,7 +550,10 @@ Test.prototype._assert = function assert(ok, opts) {
 				''
 			);
 
-			if ($strSlice(filePath, 0, tapeDir.length) === tapeDir) {
+			if (
+				$strSlice(filePath, 0, tapeDir.length) === tapeDir
+				&& $strSlice(filePath, -index.length) !== index // index.js is inside lib/
+			) {
 				continue;
 			}
 
diff --git a/package.json b/package.json
index 62ea4a7e..0aca5f05 100644
--- a/package.json
+++ b/package.json
@@ -7,12 +7,7 @@
 		"fs": false
 	},
 	"exports": {
-		".": [
-			{
-				"default": "./index.js"
-			},
-			"./index.js"
-		],
+		".": "./index.js",
 		"./lib/default_stream": "./lib/default_stream.js",
 		"./lib/results": "./lib/results.js",
 		"./lib/test": "./lib/test.js",
diff --git a/test/exit.js b/test/exit.js
index 8ed986ad..5afc3dab 100644
--- a/test/exit.js
+++ b/test/exit.js
@@ -98,7 +98,7 @@ tap.test('too few exit', function (t) {
 			'    operator: fail',
 			'    expected: 6',
 			'    actual:   5',
-			'    at: process.<anonymous> ($TAPE/index.js:$LINE:$COL)',
+			'    at: process.<anonymous> ($TAPE/lib/index.js:$LINE:$COL)',
 			'    stack: |-',
 			'      Error: plan != count',
 			'          [... stack stripped ...]',
@@ -135,7 +135,7 @@ tap.test('more planned in a second test', function (t) {
 			'    operator: fail',
 			'    expected: 2',
 			'    actual:   1',
-			'    at: process.<anonymous> ($TAPE/index.js:$LINE:$COL)',
+			'    at: process.<anonymous> ($TAPE/lib/index.js:$LINE:$COL)',
 			'    stack: |-',
 			'      Error: plan != count',
 			'          [... stack stripped ...]',
@@ -228,7 +228,7 @@ tap.test('forgot to call t.end()', function (t) {
 			'not ok 3 test exited without ending: oops forgot end',
 			'  ---',
 			'    operator: fail',
-			'    at: process.<anonymous> ($TAPE/index.js:$LINE:$COL)',
+			'    at: process.<anonymous> ($TAPE/lib/index.js:$LINE:$COL)',
 			'    stack: |-',
 			'      Error: test exited without ending: oops forgot end',
 			'          [... stack stripped ...]',