diff --git a/Gruntfile.js b/Gruntfile.js
index e42e164..17270d8 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -8,7 +8,7 @@ module.exports = function(grunt) {
       options: {
         jshintrc: '.jshintrc'
       },
-      all: ['Gruntfile.js', '*.js']
+      all: ['*.js', 'test/{,support/}*.js']
     }
   });
 
diff --git a/index.js b/index.js
index cfa5690..83efe94 100644
--- a/index.js
+++ b/index.js
@@ -8,6 +8,7 @@ var fs = require('fs');
 var path = require('path');
 var isGlob = require('is-glob');
 var resolveDir = require('resolve-dir');
+var exists = require('fs-exists-sync');
 var mm = require('micromatch');
 
 /**
@@ -26,9 +27,11 @@ module.exports = function(patterns, options) {
     throw new TypeError('findup-sync expects a string or array as the first argument.');
   }
 
-  var len = patterns.length, i = -1;
-  while (++i < len) {
-    var res = lookup(patterns[i], options);
+  var len = patterns.length;
+  var idx = -1;
+
+  while (++idx < len) {
+    var res = lookup(patterns[idx], options);
     if (res) {
       return res;
     }
@@ -39,7 +42,7 @@ module.exports = function(patterns, options) {
 
 function lookup(pattern, options) {
   options = options || {};
-  var cwd = resolveDir(options.cwd || '');
+  var cwd = path.resolve(resolveDir(options.cwd || ''));
   if (isGlob(pattern)) {
     return matchFile(cwd, pattern, options);
   } else {
@@ -50,10 +53,11 @@ function lookup(pattern, options) {
 function matchFile(cwd, pattern, opts) {
   var isMatch = mm.matcher(pattern, opts);
   var files = fs.readdirSync(cwd);
-  var len = files.length, i = -1;
+  var len = files.length;
+  var idx = -1;
 
-  while (++i < len) {
-    var name = files[i];
+  while (++idx < len) {
+    var name = files[idx];
     var fp = path.join(cwd, name);
     if (isMatch(name) || isMatch(fp)) {
       return fp;
@@ -68,8 +72,8 @@ function matchFile(cwd, pattern, opts) {
 }
 
 function findFile(cwd, filename) {
-  var fp = cwd ? (cwd + '/' + filename) : filename;
-  if (fs.existsSync(fp)) {
+  var fp = cwd ? path.resolve(cwd, filename) : filename;
+  if (exists(fp)) {
     return fp;
   }
 
@@ -77,9 +81,9 @@ function findFile(cwd, filename) {
   var len = segs.length;
 
   while (len--) {
-    cwd = segs.slice(0, len).join('/');
-    fp = cwd + '/' + filename;
-    if (fs.existsSync(fp)) {
+    cwd = segs.slice(0, len).join(path.sep);
+    fp = path.resolve(cwd, filename);
+    if (exists(fp)) {
       return fp;
     }
   }
diff --git a/package.json b/package.json
index b62dce9..66f82f5 100644
--- a/package.json
+++ b/package.json
@@ -20,19 +20,20 @@
     "test": "grunt && mocha"
   },
   "dependencies": {
+    "fs-exists-sync": "^0.1.0",
     "is-glob": "^2.0.1",
     "micromatch": "^2.3.7",
     "resolve-dir": "^0.1.0"
   },
   "devDependencies": {
-    "grunt": "^0.4.5",
+    "grunt": "^1.0.1",
     "grunt-contrib-jshint": "^0.12.0",
     "is-absolute": "^0.2.3",
     "minimist": "^1.2.0",
     "mocha": "^2.4.5",
     "normalize-path": "^2.0.1",
-    "resolve": "^1.1.7",
-    "user-home": "^2.0.0"
+    "os-homedir": "^1.0.1",
+    "resolve": "^1.1.7"
   },
   "keywords": [
     "file",
diff --git a/test/fixtures/a/a.txt b/test/fixtures/a/a.txt
new file mode 100644
index 0000000..7898192
--- /dev/null
+++ b/test/fixtures/a/a.txt
@@ -0,0 +1 @@
+a
diff --git a/test/fixtures/a/b/b.txt b/test/fixtures/a/b/b.txt
new file mode 100644
index 0000000..6178079
--- /dev/null
+++ b/test/fixtures/a/b/b.txt
@@ -0,0 +1 @@
+b
diff --git a/test/fixtures/a/b/c/c.txt b/test/fixtures/a/b/c/c.txt
new file mode 100644
index 0000000..f2ad6c7
--- /dev/null
+++ b/test/fixtures/a/b/c/c.txt
@@ -0,0 +1 @@
+c
diff --git a/test/fixtures/a/b/c/d/d.txt b/test/fixtures/a/b/c/d/d.txt
new file mode 100644
index 0000000..4bcfe98
--- /dev/null
+++ b/test/fixtures/a/b/c/d/d.txt
@@ -0,0 +1 @@
+d
diff --git a/test/fixtures/a/b/c/d/e/e.txt b/test/fixtures/a/b/c/d/e/e.txt
new file mode 100644
index 0000000..d905d9d
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/e.txt
@@ -0,0 +1 @@
+e
diff --git a/test/fixtures/a/b/c/d/e/f/f.txt b/test/fixtures/a/b/c/d/e/f/f.txt
new file mode 100644
index 0000000..6a69f92
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/f.txt
@@ -0,0 +1 @@
+f
diff --git a/test/fixtures/a/b/c/d/e/f/file.txt b/test/fixtures/a/b/c/d/e/f/file.txt
new file mode 100644
index 0000000..6a69f92
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/file.txt
@@ -0,0 +1 @@
+f
diff --git a/test/fixtures/a/b/c/d/e/f/g/file.txt b/test/fixtures/a/b/c/d/e/f/g/file.txt
new file mode 100644
index 0000000..01058d8
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/file.txt
@@ -0,0 +1 @@
+g
diff --git a/test/fixtures/a/b/c/d/e/f/g/g.txt b/test/fixtures/a/b/c/d/e/f/g/g.txt
new file mode 100644
index 0000000..01058d8
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/g.txt
@@ -0,0 +1 @@
+g
diff --git a/test/fixtures/a/b/c/d/e/f/g/h/file.txt b/test/fixtures/a/b/c/d/e/f/g/h/file.txt
new file mode 100644
index 0000000..6e9f0da
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/h/file.txt
@@ -0,0 +1 @@
+h
diff --git a/test/fixtures/a/b/c/d/e/f/g/h/h.txt b/test/fixtures/a/b/c/d/e/f/g/h/h.txt
new file mode 100644
index 0000000..6e9f0da
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/h/h.txt
@@ -0,0 +1 @@
+h
diff --git a/test/fixtures/a/b/c/d/e/f/g/h/i/file.txt b/test/fixtures/a/b/c/d/e/f/g/h/i/file.txt
new file mode 100644
index 0000000..0ddf2ba
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/h/i/file.txt
@@ -0,0 +1 @@
+i
diff --git a/test/fixtures/a/b/c/d/e/f/g/h/i/i.txt b/test/fixtures/a/b/c/d/e/f/g/h/i/i.txt
new file mode 100644
index 0000000..0ddf2ba
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/h/i/i.txt
@@ -0,0 +1 @@
+i
diff --git a/test/fixtures/a/b/c/d/e/f/g/h/i/j/file.txt b/test/fixtures/a/b/c/d/e/f/g/h/i/j/file.txt
new file mode 100644
index 0000000..4c559f7
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/h/i/j/file.txt
@@ -0,0 +1 @@
+j
diff --git a/test/fixtures/a/b/c/d/e/f/g/h/i/j/j.txt b/test/fixtures/a/b/c/d/e/f/g/h/i/j/j.txt
new file mode 100644
index 0000000..4c559f7
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/f/g/h/i/j/j.txt
@@ -0,0 +1 @@
+j
diff --git a/test/fixtures/a/b/c/d/e/file.txt b/test/fixtures/a/b/c/d/e/file.txt
new file mode 100644
index 0000000..d905d9d
--- /dev/null
+++ b/test/fixtures/a/b/c/d/e/file.txt
@@ -0,0 +1 @@
+e
diff --git a/test/fixtures/a/b/c/d/file.txt b/test/fixtures/a/b/c/d/file.txt
new file mode 100644
index 0000000..4bcfe98
--- /dev/null
+++ b/test/fixtures/a/b/c/d/file.txt
@@ -0,0 +1 @@
+d
diff --git a/test/fixtures/a/b/c/file.txt b/test/fixtures/a/b/c/file.txt
new file mode 100644
index 0000000..f2ad6c7
--- /dev/null
+++ b/test/fixtures/a/b/c/file.txt
@@ -0,0 +1 @@
+c
diff --git a/test/fixtures/a/b/file.txt b/test/fixtures/a/b/file.txt
new file mode 100644
index 0000000..6178079
--- /dev/null
+++ b/test/fixtures/a/b/file.txt
@@ -0,0 +1 @@
+b
diff --git a/test/fixtures/a/file.txt b/test/fixtures/a/file.txt
new file mode 100644
index 0000000..7898192
--- /dev/null
+++ b/test/fixtures/a/file.txt
@@ -0,0 +1 @@
+a
diff --git a/test/fixtures/file.txt b/test/fixtures/file.txt
new file mode 100644
index 0000000..d8649da
--- /dev/null
+++ b/test/fixtures/file.txt
@@ -0,0 +1 @@
+root
diff --git a/test/fixtures/root.txt b/test/fixtures/root.txt
new file mode 100644
index 0000000..d8649da
--- /dev/null
+++ b/test/fixtures/root.txt
@@ -0,0 +1 @@
+root
diff --git a/test/support/index.js b/test/support/index.js
new file mode 100644
index 0000000..399311b
--- /dev/null
+++ b/test/support/index.js
@@ -0,0 +1,51 @@
+'use strict';
+
+var path = require('path');
+var normalizePath = require('normalize-path');
+var isAbsolute = require('is-absolute');
+var resolve = require('resolve');
+
+exports.normalize = function(filepath) {
+  return filepath ? normalizePath(path.relative('.', filepath)) : null;
+};
+
+exports.chdir = function(dir) {
+  // store current cwd
+  var orig = process.cwd();
+  // set cwd to the given `dir`
+  process.chdir(dir);
+  return function() {
+    // restore original `cwd`
+    process.chdir(orig);
+  };
+};
+
+exports.npm = function npm(name) {
+  return path.dirname(resolve.sync(name));
+};
+
+exports.assert = function(assert) {
+  assert.isPath = function (filepath) {
+    assert(filepath);
+    assert.equal(typeof filepath, 'string');
+  };
+
+  assert.isAbsolute = function (filepath) {
+    assert(filepath);
+    assert.equal(typeof filepath, 'string');
+    assert(isAbsolute(filepath));
+  };
+
+  assert.basename = function (filepath, basename) {
+    assert(filepath);
+    assert.equal(typeof filepath, 'string');
+    assert.equal(path.basename(filepath), basename);
+  };
+
+  assert.dirname = function (filepath, dirname) {
+    assert(filepath);
+    assert.equal(typeof filepath, 'string');
+    assert.equal(path.dirname(path.resolve(filepath)), path.resolve(dirname));
+  };
+};
+
diff --git a/test/test.js b/test/test.js
index 1fbce7c..ab8b634 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1,70 +1,30 @@
 'use strict';
 
 require('mocha');
-var argv = require('minimist')(process.argv.slice(2));
 var fs = require('fs');
 var path = require('path');
 var assert = require('assert');
-var expand = require('resolve-dir');
-var norm = require('normalize-path');
-var home = require('user-home');
-var isAbsolute = require('is-absolute');
+var support = require('./support');
+support.assert(assert);
+var home = require('os-homedir');
+var exists = require('fs-exists-sync');
 var resolve = require('resolve');
-var cwd, actual, opts;
-
 var findup = require('../');
+var normalize = support.normalize;
+var chdir = support.chdir;
+var npm = support.npm;
+var cwd;
+var actual;
 
-function normalize(fp) {
-  return fp ? norm(path.relative('.', fp)) : null;
-}
-
-if (argv.bench) {
-  var b = path.join(__dirname, 'benchmark/code', argv.bench);
-  console.log(b);
-  findup = require(b);
-}
-
-assert.isPath = function (fp, basename) {
-  assert(fp);
-  assert.equal(typeof fp, 'string');
-};
-
-assert.isAbsolute = function (fp) {
-  assert(fp);
-  assert(isAbsolute(fp));
-};
-
-assert.exists = function (fp) {
-  assert(fp);
-  try {
-    fs.statSync(fp);
-  } catch(err) {
-    assert(fp, err);
-  }
-};
-
-assert.basename = function (fp, basename) {
-  assert(fp);
-  assert.equal(path.basename(fp), basename);
-};
-
-assert.dirname = function (fp, dirname) {
-  assert(fp);
-  assert.equal(path.dirname(path.resolve(fp)), path.resolve(dirname));
-};
-
-function npm(name) {
-  return path.dirname(resolve.sync(name));
-}
 
 describe('findup-sync', function () {
   before(function () {
-    fs.writeFileSync(home + '/_aaa.txt', '');
-    fs.writeFileSync(home + '/_bbb.txt', '');
+    fs.writeFileSync(home() + '/_aaa.txt', '');
+    fs.writeFileSync(home() + '/_bbb.txt', '');
   });
   after(function () {
-    fs.unlinkSync(home + '/_aaa.txt');
-    fs.unlinkSync(home + '/_bbb.txt');
+    fs.unlinkSync(home() + '/_aaa.txt');
+    fs.unlinkSync(home() + '/_bbb.txt');
   });
 
   it('should throw when the first arg is not a string or array:', function(cb) {
@@ -85,6 +45,34 @@ describe('findup-sync', function () {
     assert.equal(normalize(findup('package.json')), 'package.json');
   });
 
+  it('should find files in a child directory', function () {
+    var expected = path.resolve(__dirname, 'fixtures/a/b/file.txt');
+    var restore = chdir(path.resolve(__dirname, 'fixtures/a/b/c/d/e/f/g/h'));
+
+    var actual = findup('a/b/file.txt');
+    assert(actual);
+    assert(exists(actual));
+    assert.equal(actual, expected);
+    restore();
+  });
+
+  it('should find files in a child directory relative to a cwd', function () {
+    var expectedFile = path.resolve(__dirname, 'fixtures/a/b/file.txt');
+    var expectedA = path.resolve(__dirname, 'fixtures/a/a.txt');
+    var tempDir = chdir(path.resolve(__dirname, 'fixtures'));
+
+    var actualFile = findup('a/b/file.txt', {cwd: 'a/b/c/d'});
+    assert(actualFile);
+    assert(exists(actualFile));
+    assert.equal(actualFile, expectedFile);
+
+    var actualA = findup('a.txt', {cwd: 'a/b/c/d/e/f'});
+    assert(actualA);
+    assert(exists(actualA));
+    assert.equal(actualA, expectedA);
+    tempDir();
+  });
+
   it('should support normal (non-glob) file paths:', function () {
     var normPath = normalize(findup('package.json', {cwd: path.dirname(resolve.sync('normalize-path'))}));
     assert.equal(normPath, 'node_modules/normalize-path/package.json');
@@ -216,7 +204,7 @@ describe('findup-sync', function () {
   });
 
   it('should find files from absolute paths:', function () {
-    var actual = findup('package.json', { cwd: __dirname })
+    var actual = findup('package.json', { cwd: __dirname });
 
     assert.basename(actual, 'package.json');
     assert.dirname(actual, path.resolve(__dirname, '..'));
@@ -231,16 +219,16 @@ describe('findup-sync', function () {
   });
 
   it('should find files in user home:', function () {
-    var actual = findup('*', { cwd: home });
+    var actual = findup('*', { cwd: home() });
     assert.isPath(actual);
-    assert.exists(actual);
-    assert.dirname(actual, home);
+    assert(exists(actual));
+    assert.dirname(actual, home());
   });
 
   it('should find files in user home using tilde expansion:', function () {
     var actual = findup('*', { cwd: '~' });
     assert.isPath(actual);
-    assert.exists(actual);
-    assert.dirname(actual, home);
+    assert(exists(actual));
+    assert.dirname(actual, home());
   });
 });