diff --git a/index.js b/lib/index.js
similarity index 97%
rename from index.js
rename to lib/index.js
index 8076e4c9..43d28a1d 100644
--- a/index.js
+++ b/lib/index.js
@@ -1,9 +1,9 @@
 'use strict';
 
 var defined = require('defined');
-var createDefaultStream = require('./lib/default_stream');
-var Test = require('./lib/test');
-var Results = require('./lib/results');
+var createDefaultStream = require('./default_stream');
+var Test = require('./test');
+var Results = require('./results');
 var through = require('@ljharb/through');
 
 var canEmitExit = typeof process !== 'undefined' && process
diff --git a/lib/test.js b/lib/test.js
index 33c7241b..13a59450 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -496,6 +496,7 @@ 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++) {
 			/*
@@ -558,7 +559,10 @@ 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/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 ...]',