diff --git a/coverage.php b/adminer/coverage.inc.php
similarity index 60%
rename from coverage.php
rename to adminer/coverage.inc.php
index 055261f3..dc0bbf4e 100644
--- a/coverage.php
+++ b/adminer/coverage.inc.php
@@ -1,11 +1,4 @@
 <?php
-error_reporting(E_ALL & ~E_NOTICE);
-if (!ini_get("session.auto_start")) {
-	session_name("adminer_sid");
-	session_set_cookie_params(ini_get("session.cookie_lifetime"), preg_replace('~_coverage\\.php(\\?.*)?$~', '', $_SERVER["REQUEST_URI"]));
-	session_start();
-}
-
 function xhtml_open_tags($s) {
 	// returns array of opened tags in $s
 	$return = array();
@@ -20,21 +13,17 @@ function xhtml_open_tags($s) {
 	return $return;
 }
 
-if (!extension_loaded("xdebug")) {
-	echo "<p>Xdebug has to be enabled.</p>\n";
-}
+page_header("Coverage", (extension_loaded("xdebug") ? "" : "Xdebug has to be enabled."));
 
-if ($_GET["start"]) {
-	unset($_SESSION["coverage"]);
-	xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
-	$_SESSION["coverage"] = array();
-	include "./adminer/index.php";
-	header("Location: .");
-	exit;
-}
-if (preg_match('~^(include/)?[-_.a-z0-9]+$~i', $_GET["filename"])) {
+if ($_GET["coverage"] === "0") {
+	unset($_SESSION["coverage"]); // disable coverage if it is not available
+	if (extension_loaded("xdebug")) {
+		$_SESSION["coverage"] = array();
+		echo "<p class='message'>Coverage started.</p>\n";
+	}
+} elseif (preg_match('~^(include/)?[-_.a-z0-9]+$~i', $_GET["coverage"])) {
 	// highlight single file
-	$filename = "adminer/$_GET[filename]";
+	$filename = $_GET["coverage"];
 	$cov = $_SESSION["coverage"][realpath($filename)];
 	$file = explode("<br />", highlight_file($filename, true));
 	unset($prev_color);
@@ -64,17 +53,18 @@ if (preg_match('~^(include/)?[-_.a-z0-9]+$~i', $_GET["filename"])) {
 	}
 } else {
 	// display list of files
-	echo "<table border='0' cellspacing='0' cellpadding='1'>\n";
-	foreach (array_merge(glob("adminer/*.php"), glob("adminer/include/*.php")) as $filename) {
+	echo "<table cellspacing='0'>\n";
+	foreach (array_merge(glob("*.php"), glob("include/*.php")) as $filename) {
 		$cov = $_SESSION["coverage"][realpath($filename)];
-		$filename = substr($filename, 8);
 		$ratio = 0;
 		if (isset($cov)) {
 			$values = array_count_values($cov);
 			$ratio = round(100 - 100 * $values[-1] / count($cov));
 		}
-		echo "<tr><td align='right' style='background-color: " . ($ratio < 50 ? "Red" : ($ratio < 75 ? "#FFEA20" : "#A7FC9D")) . ";'>$ratio%</td><td><a href='coverage.php?filename=$filename'>$filename</a></td></tr>\n";
+		echo "<tr><td align='right' style='background-color: " . ($ratio < 50 ? "Red" : ($ratio < 75 ? "#FFEA20" : "#A7FC9D")) . ";'>$ratio%</td><th><a href=\"" . htmlspecialchars($SELF) . "coverage=$filename\">$filename</a></th></tr>\n";
 	}
 	echo "</table>\n";
-	echo "<p><a href='coverage.php?start=1'>Start new coverage</a> (requires <a href='http://www.xdebug.org'>Xdebug</a>)</p>\n";
+	echo '<p><a href="' . htmlspecialchars($SELF) . 'coverage=0">Start new coverage</a></p>' . "\n";
 }
+page_footer("auth");
+exit;
diff --git a/adminer/index.php b/adminer/index.php
index 23e1e1de..04f28c8d 100644
--- a/adminer/index.php
+++ b/adminer/index.php
@@ -26,10 +26,6 @@ if (isset($_SESSION["coverage"])) {
 	}
 	xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
 	register_shutdown_function('save_coverage');
-	if ($_GET["start"]) {
-		// included from ../coverage.php
-		return;
-	}
 }
 // disable magic quotes to be able to use database escaping function
 if (get_magic_quotes_gpc()) {
@@ -55,6 +51,9 @@ include "./include/functions.inc.php";
 include "./include/lang.inc.php";
 include "./lang/$LANG.inc.php";
 include "./include/design.inc.php";
+if (isset($_GET["coverage"])) {
+	include "./coverage.inc.php";
+}
 include "./include/pdo.inc.php";
 include "./include/mysql.inc.php";
 include "./include/auth.inc.php";
diff --git a/compile.php b/compile.php
index 3f2ce468..36624937 100644
--- a/compile.php
+++ b/compile.php
@@ -171,6 +171,7 @@ if ($_SERVER["argc"] > 1) {
 
 $filename = "adminer" . ($_COOKIE["adminer_lang"] ? "-$_COOKIE[adminer_lang]" : "") . ".php";
 $file = file_get_contents(dirname(__FILE__) . "/adminer/index.php");
+$file = preg_replace('(' . str_replace(' ', '\\s*', preg_quote(' if (isset($_GET["coverage"])) { include "./coverage.inc.php"; }')) . ')', '', $file);
 $file = preg_replace_callback('~\\b(include|require) "([^"]*)";~', 'put_file', $file);
 $file = preg_replace("~if \\(isset\\(\\\$_SESSION\\[\"coverage.*\n}\n| && !isset\\(\\\$_SESSION\\[\"coverage\"\\]\\)~sU", '', $file);
 if ($_COOKIE["adminer_lang"]) {
diff --git a/tests/0-login.html b/tests/0-login.html
index aac7c98a..d1fe3c71 100644
--- a/tests/0-login.html
+++ b/tests/0-login.html
@@ -13,7 +13,7 @@
 </thead><tbody>
 <tr>
 	<td>open</td>
-	<td>/adminer/coverage.php?start=1</td>
+	<td>/adminer/adminer/?coverage=0</td>
 	<td></td>
 </tr>
 <tr>
diff --git a/tests/logout.html b/tests/logout.html
index 1e1480cd..d3358b14 100644
--- a/tests/logout.html
+++ b/tests/logout.html
@@ -38,7 +38,7 @@
 </tr>
 <tr>
 	<td>open</td>
-	<td>/adminer/coverage.php</td>
+	<td>/adminer/adminer/?coverage=</td>
 	<td></td>
 </tr>