diff --git a/.gitattributes b/.gitattributes
index 3520cb9..8b57b3a 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2,5 +2,4 @@
 /.gitignore     export-ignore
 /.gitattributes export-ignore
 /min_extras     export-ignore
-/min_unit_tests export-ignore
 /tests          export-ignore
diff --git a/README.md b/README.md
index 599ba2d..a90309e 100644
--- a/README.md
+++ b/README.md
@@ -68,10 +68,8 @@ Support
 Unit Testing
 ------------
 
-1. Open the file `min_unit_tests/_inc.php`.
-1. Enable the file by commenting out the `die()` statement. 
-1. Access: http://example.org/min/min_unit_tests/test_all.php (If you wish, the other test_*.php files can be run to test individual components with more verbose output.)
-1. Re-disable the `_inc.php` file when you are done.
+1. Install via Composer
+1. `composer run test`
 
 Warnings
 --------
diff --git a/UPGRADING.txt b/UPGRADING.txt
index 647b9cc..700c841 100644
--- a/UPGRADING.txt
+++ b/UPGRADING.txt
@@ -7,7 +7,7 @@ UPGRADING FROM 2.1.*
     /min/config.php       --> /min/old_config.php
     /min/groupsConfig.php --> /min/old_groupsConfig.php
 
-2. Overwrite all files in /min (and /min_unit_tests) with those from this zip.
+2. Overwrite all files in /min with those from this zip.
 
 3. Delete /min/groupsConfig.php
 
diff --git a/composer.json b/composer.json
index b80d499..36746ad 100644
--- a/composer.json
+++ b/composer.json
@@ -35,5 +35,8 @@
 	"suggest": {
 		"leafo/lessphp": "~0.4.0",
 		"meenie/javascript-packer": "~1.1"
+	},
+	"scripts": {
+		"test": "phpunit"
 	}
 }
diff --git a/docs/TestingMinify.wiki.md b/docs/TestingMinify.wiki.md
deleted file mode 100644
index 937be1a..0000000
--- a/docs/TestingMinify.wiki.md
+++ /dev/null
@@ -1,12 +0,0 @@
-# Unit Testing
-
-0. If you haven't already, install Minify using the [UserGuide](UserGuide.wiki.md).
-
-1. Copy the "min\_unit\_tests" directory directly into your DOCUMENT\_ROOT.
-
-2. Browse to http://example.com/min_unit_tests/test_all.php
-
-You should see a list of "PASS"es. You can run the individual test PHP files in http://example.com/min_unit_tests/ for more verbose output.
-
-## Common Problems
-
diff --git a/docs/UserGuide.wiki.md b/docs/UserGuide.wiki.md
index 6284d94..a572894 100644
--- a/docs/UserGuide.wiki.md
+++ b/docs/UserGuide.wiki.md
@@ -128,4 +128,4 @@ url.rewrite-once = ( "^/min/([a-z]=.*)" => "/min/index.php?$1" )
 
 # Problems?
 
-See [CommonProblems](CommonProblems.wiki.md) and [Debugging](Debugging.wiki.md). You might also try [TestingMinify](TestingMinify.wiki.md) (running `test_environment.php` in particular).
+See [CommonProblems](CommonProblems.wiki.md) and [Debugging](Debugging.wiki.md). You might also try running `server-info.php` in particular.
diff --git a/min_extras/cli/minify.php b/min_extras/cli/minify.php
index 3d23cf5..30394e9 100755
--- a/min_extras/cli/minify.php
+++ b/min_extras/cli/minify.php
@@ -21,8 +21,8 @@ if (! $cli->validate()) {
     if ($cli->isHelpRequest) {
         echo $cli->getArgumentsListing();
     }
-    echo "EXAMPLE: ./minify.php ../../min_unit_tests/_test_files/js/*.js\n";
-    echo "EXAMPLE: ./minify.php -d../.. ../../min_unit_tests/_test_files/css/*.css\n";
+    echo "EXAMPLE: ./minify.php ../../tests/_test_files/js/*.js\n";
+    echo "EXAMPLE: ./minify.php -d../.. ../../tests/_test_files/css/*.css\n";
     echo "EXAMPLE: echo \"var js = 'Awesome' && /cool/;\" | ./minify.php -t js\n";
     echo "EXAMPLE: echo \"sel > ector { prop: 'value  '; }\" | ./minify.php -t css\n";
     echo "\n";
diff --git a/min_extras/cli/rewrite-uris.php b/min_extras/cli/rewrite-uris.php
index b9ba97e..908d1f3 100755
--- a/min_extras/cli/rewrite-uris.php
+++ b/min_extras/cli/rewrite-uris.php
@@ -18,7 +18,7 @@ if (! $cli->validate()) {
     if ($cli->isHelpRequest) {
         echo $cli->getArgumentsListing();
     }
-    echo "EXAMPLE: ./rewrite-uris.php -v -d../.. ../../min_unit_tests/_test_files/css/paths_rewrite.css ../../min_unit_tests/_test_files/css/comments.css
+    echo "EXAMPLE: ./rewrite-uris.php -v -d../.. ../../tests/_test_files/css/paths_rewrite.css ../../tests/_test_files/css/comments.css
     \n";
     exit(0);
 }
diff --git a/min_unit_tests/.htaccess b/min_unit_tests/.htaccess
deleted file mode 100644
index 4e05c4c..0000000
--- a/min_unit_tests/.htaccess
+++ /dev/null
@@ -1,4 +0,0 @@
-<IfModule mod_env.c>
-# In case AddOutputFilterByType has been added
-SetEnv no-gzip
-</IfModule>
diff --git a/min_unit_tests/HTTP_ConditionalGet/2.php b/min_unit_tests/HTTP_ConditionalGet/2.php
deleted file mode 100644
index 237ce0a..0000000
--- a/min_unit_tests/HTTP_ConditionalGet/2.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-require __DIR__ . '/../../bootstrap.php';
-
-// emulate regularly updating document
-$every = 20;
-$lastModified = round(time()/$every)*$every - $every;
-
-$cg = new HTTP_ConditionalGet(array(
-    'lastModifiedTime' => $lastModified
-));
-if ($cg->cacheIsValid) {
-    $cg->sendHeaders();
-    // we're done
-    exit();
-}
-
-// generate content
-$title = 'Last-Modified is known : add Content-Length';
-$explain = '
-<p>Here, like <a href="./">the first example</a>, we know the Last-Modified time,
-but we also want to set the Content-Length to increase cacheability and allow
-HTTP persistent connections. Instead of sending headers immediately, we first
-generate our content, then use <code>setContentLength(strlen($content))</code>
-to add the header. Then finally call <code>sendHeaders()</code> and send the
-content.</p>
-<p><strong>Note:</strong> This is not required if your PHP config buffers all
-output and your script doesn\'t do any incremental flushing of the output
-buffer. PHP will generally set Content-Length for you if it can.</p>
-<p>This script emulates a document that changes every ' .$every. ' seconds.
-<br>This is version: ' . date('r', $lastModified) . '</p>
-';
-
-require '_include.php';
-$content = get_content(array(
-    'title' => $title
-    ,'explain' => $explain
-));
-
-$cg->setContentLength(strlen($content));
-$cg->sendHeaders();
-send_slowly($content);
-
diff --git a/min_unit_tests/HTTP_ConditionalGet/3.php b/min_unit_tests/HTTP_ConditionalGet/3.php
deleted file mode 100644
index 67f6ee9..0000000
--- a/min_unit_tests/HTTP_ConditionalGet/3.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-require __DIR__ . '/../../bootstrap.php';
-
-// generate content first (not ideal)
-// emulate regularly updating document
-$every = 20;
-$lastModified = round(time()/$every)*$every - $every;
-$title = 'Last-Modified is unknown : use hash of content for ETag';
-$explain = '
-<p>When Last-Modified is unknown, you can still use ETags, but you need a short
-string that is unique for that content. In the worst case, you have to generate
-all the content first, <em>then</em> instantiate HTTP_ConditionalGet, setting
-the array key <code>contentHash</code> to the output of a hash function of the
-content. Since we have the full content, we might as well also use
-<code>setContentLength(strlen($content))</code> in the case where we need to
-send it.</p>
-<p>This script emulates a document that changes every ' .$every. ' seconds.
-<br>This is version: ' . date('r', $lastModified) . '</p>
-';
-require '_include.php';
-$content = get_content(array(
-    'title' => $title
-    ,'explain' => $explain
-));
-
-$cg = new HTTP_ConditionalGet(array(
-    'contentHash' => substr(md5($content), 7)
-));
-if ($cg->cacheIsValid) {
-    $cg->sendHeaders();
-    // we're done
-    exit();
-}
-$cg->setContentLength(strlen($content));
-$cg->sendHeaders();
-
-send_slowly($content);
-
diff --git a/min_unit_tests/HTTP_ConditionalGet/4.php b/min_unit_tests/HTTP_ConditionalGet/4.php
deleted file mode 100644
index d749b26..0000000
--- a/min_unit_tests/HTTP_ConditionalGet/4.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-require __DIR__ . '/../../bootstrap.php';
-
-// emulate regularly updating document
-$every = 20;
-$lastModified = round(time()/$every)*$every - $every;
-
-list($enc,) = HTTP_Encoder::getAcceptedEncoding();
-
-$cg = new HTTP_ConditionalGet(array(
-    'lastModifiedTime' => $lastModified
-    ,'encoding' => $enc
-));
-$cg->sendHeaders();
-if ($cg->cacheIsValid) {
-    // we're done
-    exit();
-}
-
-// output encoded content
-
-$title = 'ConditionalGet + Encoder';
-$explain = '
-<p>Using ConditionalGet and Encoder is straightforward. First impliment the
-ConditionalGet, then if the cache is not valid, encode and send the content</p>
-<p>This script emulates a document that changes every ' .$every. ' seconds.
-<br>This is version: ' . date('r', $lastModified) . '</p>
-';
-require '_include.php';
-$content = get_content(array(
-    'title' => $title
-    ,'explain' => $explain
-));
-
-$he = new HTTP_Encoder(array(
-    'content' => get_content(array(
-        'title' => $title
-        ,'explain' => $explain
-    ))
-));
-$he->encode();
-
-// usually you would just $he->sendAll(), but here we want to emulate slow
-// connection
-$he->sendHeaders();
-send_slowly($he->getContent());
diff --git a/min_unit_tests/HTTP_ConditionalGet/5.php b/min_unit_tests/HTTP_ConditionalGet/5.php
deleted file mode 100644
index dbd079a..0000000
--- a/min_unit_tests/HTTP_ConditionalGet/5.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-require __DIR__ . '/../../bootstrap.php';
-
-// far expires
-$cg = new HTTP_ConditionalGet(array(
-    'maxAge' => 20
-    ,'lastModifiedTime' => filemtime(__FILE__)
-));
-$cg->sendHeaders();
-
-// generate, send content
-$title = 'Last-Modified + Expires';
-$explain = '
-<p>Here we set a static "lastModifiedTime" and "maxAge" to 20. The browser
-will consider this document fresh for 20 seconds, then revalidate its cache. After
-the 304 response, the cache will be good for another 20 seconds. Unless you force
-a reload, there will only be 304 responses for this page after the initial download.
-';
-
-require '_include.php';
-echo get_content(array(
-    'title' => $title
-    ,'explain' => $explain
-));
-
diff --git a/min_unit_tests/HTTP_ConditionalGet/_include.php b/min_unit_tests/HTTP_ConditionalGet/_include.php
deleted file mode 100644
index 9b65ae1..0000000
--- a/min_unit_tests/HTTP_ConditionalGet/_include.php
+++ /dev/null
@@ -1,64 +0,0 @@
-<?php
-
-function send_slowly($content)
-{
-    $half = ceil(strlen($content) / 2);
-    $content = str_split($content, $half);
-    while ($chunk = array_shift($content)) {
-        sleep(1);
-        echo $chunk;
-        ob_get_level() && ob_flush();
-        flush();
-    }
-}
-
-function get_content($data)
-{
-    ob_start();
-?>
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
-<html>
-<head>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
-<title>HTTP_ConditionalGet : <?php echo $data['title']; ?></title>
-</head>
-<body>
-<h1>HTTP_ConditionalGet</h1>
-<h2><?php echo $data['title']; ?></h2>
-<?php echo $data['explain']; ?>
-<ul>
-	<li><a href="./">Last-Modified is known : simple usage</a></li>
-	<li><a href="2.php">Last-Modified is known : add Content-Length</a></li>
-	<li><a href="3.php">Last-Modified is unknown : use hash of content for ETag</a></li>
-	<li><a href="4.php">ConditionalGet + Encoder</a></li>
-	<li><a href="5.php">Last-Modified + Expires</a></li>
-</ul>
-<h2>Notes</h2>
-<h3>How to distinguish 200 and 304 responses</h3>
-<p>For these pages all 200 responses are sent in chunks a second apart, so you
-should notice that 304 responses are quicker. You can also use HTTP sniffers
-like <a href="http://www.fiddlertool.com/">Fiddler (win)</a> and
-<a href="http://livehttpheaders.mozdev.org/">LiveHTTPHeaders (Firefox add-on)</a>
-to verify headers and content being sent.</p>
-<h3>Browser notes</h3>
-<dl>
-	<dt>Opera</dt>
-	<dd>Opera has a couple behaviors against the HTTP spec: Manual refreshes (F5)
-    prevents the ETag/If-Modified-Since headers from being sent; it only sends
-    them when following a link or bookmark. Also, Opera will not honor the
-    <code>must-revalidate</code> Cache-Control value unless <code>max-age</code>
-    is set. To get Opera to follow the spec, ConditionalGet will send Opera max-age=0
-    (if one is not already set).</dd>
-	<dt>Safari</dt>
-	<dd>ETag validation is unsupported, but Safari supports HTTP/1.0 validation via
-		 If-Modified-Since headers as long as the cache is explicitly marked
-		"public" or "private" ("private" is default in ConditionalGet).</dd>
-</dl>
-</body>
-</html>
-<?php
-    $content = ob_get_contents();
-    ob_end_clean();
-    return $content;
-}
-
diff --git a/min_unit_tests/HTTP_ConditionalGet/index.php b/min_unit_tests/HTTP_ConditionalGet/index.php
deleted file mode 100644
index e40fd11..0000000
--- a/min_unit_tests/HTTP_ConditionalGet/index.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-
-require __DIR__ . '/../../bootstrap.php';
-
-// emulate regularly updating document
-$every = 20;
-$lastModified = round(time()/$every)*$every - $every;
-
-$cg = new HTTP_ConditionalGet(array(
-    'lastModifiedTime' => $lastModified
-));
-$cg->sendHeaders();
-if ($cg->cacheIsValid) {
-    // we're done
-    exit();
-}
-
-$title = 'Last-Modified is known : simple usage';
-$explain = '
-<p>If your content has not changed since a certain timestamp, set this via the
-the <code>lastModifiedTime</code> array key when instantiating HTTP_ConditionalGet.
-You can immediately call the method <code>sendHeaders()</code> to set the
-Last-Modified, ETag, and Cache-Control headers. The, if <code>cacheIsValid</code>
-property is false, you echo the content.</p>
-<p>This script emulates a document that changes every ' .$every. ' seconds.
-<br>This is version: ' . date('r', $lastModified) . '</p>
-';
-
-require '_include.php';
-
-send_slowly(get_content(array(
-    'title' => $title
-    ,'explain' => $explain
-)));
-
diff --git a/min_unit_tests/HTTP_Encoder/green.png b/min_unit_tests/HTTP_Encoder/green.png
deleted file mode 100644
index d9d3a30..0000000
Binary files a/min_unit_tests/HTTP_Encoder/green.png and /dev/null differ
diff --git a/min_unit_tests/HTTP_Encoder/index.php b/min_unit_tests/HTTP_Encoder/index.php
deleted file mode 100644
index 3566548..0000000
--- a/min_unit_tests/HTTP_Encoder/index.php
+++ /dev/null
@@ -1,57 +0,0 @@
-<?php
-ini_set('display_errors', 'on');
-
-require __DIR__ . '/../../bootstrap.php';
-
-if (!isset($_GET['test'])) {
-    $type = 'text/html';
-    ob_start();
-?>
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
-"http://www.w3.org/TR/html4/strict.dtd">
-<html>
-<head>
-<title>HTTP_Encoder Test</title>
-<style type="text/css">
-@import "?test=2";
-#img {background:url("?test=1");}
-.green {background:#0f0;}
-p span {padding:0 .5em;}
-</style>
-</head>
-<body>
-<h1>HTTP_Encoder test</h1>
-<p><span class="green"> HTML </span></p>
-<p><span id="css"> CSS </span></p>
-<p><span id="js"> Javascript </span></p>
-<p><span id="img"> image </span></p>
-<script src="?test=3" type="text/javascript"></script>
-</body>
-</html>
-<?php
-    $content = ob_get_contents();
-    ob_end_clean();
-
-} elseif ($_GET['test'] == '1') {
-    $content = file_get_contents(__DIR__ . '/green.png');
-    $type = 'image/png';
-
-} elseif ($_GET['test'] == '2') {
-    $content = '#css {background:#0f0;}';
-    $type = 'text/css';
-
-} else {
-    $content = '
-window.onload = function(){
-    document.getElementById("js").className = "green";
-};
-    ';
-    $type = 'application/x-javascript';
-}
-
-$he = new HTTP_Encoder(array(
-    'content' => $content
-    ,'type' => $type
-));
-$he->encode();
-$he->sendAll();
diff --git a/min_unit_tests/_inc.php b/min_unit_tests/_inc.php
deleted file mode 100644
index 9013f57..0000000
--- a/min_unit_tests/_inc.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-// comment this out to run tests
-die('This script is disabled.');
-
-require __DIR__ . '/../bootstrap.php';
-require __DIR__ . '/../config.php';
-
-// set cache path and doc root if configured
-$minifyCachePath = isset($min_cachePath) 
-    ? $min_cachePath 
-    : '';
-if ($min_documentRoot) {
-    $_SERVER['DOCUMENT_ROOT'] = $min_documentRoot;
-}
-
-// default log to FirePHP
-if ($min_errorLogger && true !== $min_errorLogger) { // custom logger
-    Minify_Logger::setLogger($min_errorLogger);
-} else {
-    Minify_Logger::setLogger(FirePHP::getInstance(true));
-}
-
-error_reporting(E_ALL | E_STRICT);
-ini_set('display_errors', 1);
-
-header('Content-Type: text/plain;charset=utf-8');
-
-$thisDir = __DIR__;
-
-/**
- * pTest - PHP Unit Tester
- * @param mixed $test Condition to test, evaluated as boolean
- * @param string $message Descriptive message to output upon test
- * @url http://www.sitepoint.com/blogs/2007/08/13/ptest-php-unit-tester-in-9-lines-of-code/
- */
-function assertTrue($test, $message)
-{
-	static $count;
-	if (!isset($count)) $count = array('pass'=>0, 'fail'=>0, 'total'=>0);
-
-	$mode = $test ? 'pass' : 'fail';
-	$outMode = $test ? 'PASS' : '!FAIL';
-	printf("%s: %s (%d of %d tests run so far have %sed)\n",
-		$outMode, $message, ++$count[$mode], ++$count['total'], $mode);
-	
-	return (bool)$test;
-}
-
-/**
- * Get number of bytes in a string regardless of mbstring.func_overload
- *
- * @param string $str
- * @return int
- */
-function countBytes($str)
-{
-    return (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2))
-        ? mb_strlen($str, '8bit')
-        : strlen($str);
-}
-
-ob_start();
diff --git a/tests/TestCase.php b/tests/TestCase.php
index e6d4b52..a871461 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -9,8 +9,8 @@ class TestCase extends PHPUnit_Framework_TestCase
 
     public static function setupBeforeClass()
     {
-        self::$document_root = __DIR__ . '/../min_unit_tests';
-        self::$test_files = self::$document_root . '/_test_files';
+        self::$document_root = __DIR__;
+        self::$test_files = __DIR__ . '/_test_files';
     }
 
     /**
diff --git a/min_unit_tests/_test_files/css/comments.css b/tests/_test_files/css/comments.css
similarity index 100%
rename from min_unit_tests/_test_files/css/comments.css
rename to tests/_test_files/css/comments.css
diff --git a/min_unit_tests/_test_files/css/comments.min.css b/tests/_test_files/css/comments.min.css
similarity index 100%
rename from min_unit_tests/_test_files/css/comments.min.css
rename to tests/_test_files/css/comments.min.css
diff --git a/min_unit_tests/_test_files/css/hacks.css b/tests/_test_files/css/hacks.css
similarity index 100%
rename from min_unit_tests/_test_files/css/hacks.css
rename to tests/_test_files/css/hacks.css
diff --git a/min_unit_tests/_test_files/css/hacks.min.css b/tests/_test_files/css/hacks.min.css
similarity index 100%
rename from min_unit_tests/_test_files/css/hacks.min.css
rename to tests/_test_files/css/hacks.min.css
diff --git a/min_unit_tests/_test_files/css/issue210.css b/tests/_test_files/css/issue210.css
similarity index 100%
rename from min_unit_tests/_test_files/css/issue210.css
rename to tests/_test_files/css/issue210.css
diff --git a/min_unit_tests/_test_files/css/issue210.min.css b/tests/_test_files/css/issue210.min.css
similarity index 100%
rename from min_unit_tests/_test_files/css/issue210.min.css
rename to tests/_test_files/css/issue210.min.css
diff --git a/min_unit_tests/_test_files/css/issue62.css b/tests/_test_files/css/issue62.css
similarity index 100%
rename from min_unit_tests/_test_files/css/issue62.css
rename to tests/_test_files/css/issue62.css
diff --git a/min_unit_tests/_test_files/css/issue62.min.css b/tests/_test_files/css/issue62.min.css
similarity index 100%
rename from min_unit_tests/_test_files/css/issue62.min.css
rename to tests/_test_files/css/issue62.min.css
diff --git a/min_unit_tests/_test_files/css/paths_prepend.css b/tests/_test_files/css/paths_prepend.css
similarity index 100%
rename from min_unit_tests/_test_files/css/paths_prepend.css
rename to tests/_test_files/css/paths_prepend.css
diff --git a/min_unit_tests/_test_files/css/paths_prepend.min.css b/tests/_test_files/css/paths_prepend.min.css
similarity index 100%
rename from min_unit_tests/_test_files/css/paths_prepend.min.css
rename to tests/_test_files/css/paths_prepend.min.css
diff --git a/min_unit_tests/_test_files/css/paths_rewrite.css b/tests/_test_files/css/paths_rewrite.css
similarity index 100%
rename from min_unit_tests/_test_files/css/paths_rewrite.css
rename to tests/_test_files/css/paths_rewrite.css
diff --git a/min_unit_tests/_test_files/css/paths_rewrite.min.css b/tests/_test_files/css/paths_rewrite.min.css
similarity index 100%
rename from min_unit_tests/_test_files/css/paths_rewrite.min.css
rename to tests/_test_files/css/paths_rewrite.min.css
diff --git a/min_unit_tests/_test_files/css/readme.txt b/tests/_test_files/css/readme.txt
similarity index 100%
rename from min_unit_tests/_test_files/css/readme.txt
rename to tests/_test_files/css/readme.txt
diff --git a/min_unit_tests/_test_files/css/selectors.css b/tests/_test_files/css/selectors.css
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