diff --git a/cake/tests/cases/libs/html_coverage_report.test.php b/cake/tests/cases/libs/html_coverage_report.test.php
new file mode 100644
index 00000000000..7ee39d10744
--- /dev/null
+++ b/cake/tests/cases/libs/html_coverage_report.test.php
@@ -0,0 +1,46 @@
+<?php
+
+require_once CAKE . 'tests' . DS . 'lib' . DS . 'coverage' . DS . 'html_coverage_report.php';
+
+class HtmlCoverageReportTest extends CakeTestCase {
+/**
+ * setup
+ *
+ * @return void
+ */
+	public function setUp() {
+		$reporter = new CakeBaseReporter();
+		$reporter->params = array('app' => false, 'plugin' => false, 'group' => false);
+		$coverage = array();
+		$this->Coverage = new HtmlCoverageReport($coverage, $reporter);
+	}
+
+/**
+ * test getting the path filters.
+ *
+ * @return void
+ */
+	function testGetPathFilter() {
+		$this->Coverage->appTest = false;
+		$result = $this->Coverage->getPathFilter();
+		$this->assertEquals(TEST_CAKE_CORE_INCLUDE_PATH, $result);
+
+		$this->Coverage->appTest = true;
+		$result = $this->Coverage->getPathFilter();
+		$this->assertEquals(ROOT . DS . APP_DIR . DS, $result);
+
+		$this->Coverage->appTest = false;
+		$this->Coverage->pluginTest = 'test_plugin';
+		$result = $this->Coverage->getPathFilter();
+		$this->assertEquals(ROOT . DS . APP_DIR . DS . 'plugins' . DS .'test_plugin' . DS, $result);
+	}
+
+/**
+ * teardown
+ *
+ * @return void
+ */
+	function tearDown() {
+		unset($this->Coverage);
+	}
+}
\ No newline at end of file
diff --git a/cake/tests/lib/coverage/html_coverage_report.php b/cake/tests/lib/coverage/html_coverage_report.php
index 4c1840a7e68..0e47a83359d 100644
--- a/cake/tests/lib/coverage/html_coverage_report.php
+++ b/cake/tests/lib/coverage/html_coverage_report.php
@@ -12,7 +12,11 @@ class HtmlCoverageReport {
  *
  * @var string
  */
-	protected $_coverage;
+	protected $_rawCoverage;
+
+	public $appTest = false;
+	public $pluginTest = false;
+	public $groupTest = false;
 
 /**
  * Constructor
@@ -20,8 +24,35 @@ class HtmlCoverageReport {
  * @param array $coverage Array of coverage data from PHPUnit_Test_Result
  * @return void
  */
-	public function __construct($coverage) {
-		$this->_coverage = $coverage;
+	public function __construct($coverage, CakeBaseReporter $reporter) {
+		$this->_rawCoverage = $coverage;
+		$this->setParams($reporter);
+	}
+
+/**
+ * Pulls params out of the reporter.
+ *
+ * @return void
+ */
+	protected function setParams(CakeBaseReporter $reporter) {
+		if ($reporter->params['app']) {
+			$this->appTest = true;
+		}
+		if ($reporter->params['group']) {
+			$this->groupTest = true;
+		}
+		if ($reporter->params['plugin']) {
+			$this->pluginTest = Inflector::underscore($reporter->params['plugin']);
+		}
+	}
+
+/**
+ * Set the coverage data array
+ *
+ * @return void
+ */
+	public function setCoverage($coverage) {
+		$this->_rawCoverage = $coverage;
 	}
 
 /**
@@ -30,6 +61,54 @@ public function __construct($coverage) {
  * @return string compiled html report.
  */
 	public function report() {
-		
+		$pathFilter = $this->getPathFilter();
+		$coverageData = $this->filterCoverageDataByPath($pathFilter);
+	}
+
+/**
+ * Gets the base path that the files we are interested in live in.
+ * If appTest ist
+ *
+ * @return void
+ */
+	public function getPathFilter() {
+		$path = ROOT . DS;
+		if ($this->appTest) {
+			$path .= APP_DIR . DS;
+		} elseif ($this->pluginTest) {
+			$path = App::pluginPath($this->pluginTest);
+		} else {
+			$path = TEST_CAKE_CORE_INCLUDE_PATH;
+		}
+		return $path;
+	}
+
+/**
+ * Filters the coverage data by path.  Files not in the provided path will be removed.
+ * This method will merge all the various test run reports as well into a single report per file.
+ *
+ * @param string $path Path to filter files by.
+ * @return array Array of coverage data for files that match the given path.
+ */
+	public function filterCoverageDataByPath($path) {
+		$files = array();
+		foreach ($this->_rawCoverage as $testRun) {
+			foreach ($testRun['files'] as $filename => $fileCoverage) {
+				if (strpos($filename, $path) !== 0) {
+					continue;
+				}
+				if (!isset($files[$filename])) {
+					$files[$filename] = array();
+				}
+				foreach ($fileCoverage as $line => $value) {
+					if (!isset($files[$filename][$line])) {
+						$files[$filename][$line] = $value;
+					} elseif ($files[$filename][$line] < $value) {
+						$files[$filename][$line] = $value;
+					}
+				}
+			}
+		}
+		return $files;
 	}
 }
\ No newline at end of file