diff --git a/forms/HtmlEditorField.php b/forms/HtmlEditorField.php
index 2d2171aa3..e088b8401 100644
--- a/forms/HtmlEditorField.php
+++ b/forms/HtmlEditorField.php
@@ -582,11 +582,13 @@ class HtmlEditorField_Toolbar extends RequestHandler {
 
 			// Similar to the regex found in HtmlEditorField.js / getAnchors method.
 			if (preg_match_all(
-				"/\s+(name|id)\s*=\s*([\"'])([^\\2\s>]*?)\\2|\s+(name|id)\s*=\s*([^\"']+)[\s +>]/im",
+				"/\\s+(name|id)\\s*=\\s*([\"'])([^\\2\\s>]*?)\\2|\\s+(name|id)\\s*=\\s*([^\"']+)[\\s +>]/im",
 				$page->Content,
 				$matches
 			)) {
-				$anchors = array_filter(array_merge($matches[3], $matches[5]));
+				$anchors = array_values(array_unique(array_filter(
+					array_merge($matches[3], $matches[5]))
+				));
 			}
 
 		} else {
diff --git a/tests/forms/HtmlEditorFieldTest.php b/tests/forms/HtmlEditorFieldTest.php
index 067e71210..726666cfd 100644
--- a/tests/forms/HtmlEditorFieldTest.php
+++ b/tests/forms/HtmlEditorFieldTest.php
@@ -133,8 +133,7 @@ class HtmlEditorFieldTest extends FunctionalTest {
 			'bar',
 			'baz',
 			'bam',
-			"some'id",
-			'bar',
+			"some'id",
 		);
 		$page = new Page();
 		$page->Title = 'Test';
@@ -142,15 +141,15 @@ class HtmlEditorFieldTest extends FunctionalTest {
 		$page->write();
 		$this->useDraftSite(true);
 
-		$controller = new Controller();
-		$controller->setRequest(new SS_HTTPRequest('GET', '/', array(
+		$request = new SS_HTTPRequest('GET', '/', array(
 			'PageID' => $page->ID,
-		)));
-		$controller->init();
+		));
 
-		$toolBar = new HtmlEditorField_Toolbar($controller, 'test');
+		$toolBar = new HtmlEditorField_Toolbar(new Controller(), 'test');
+		$toolBar->setRequest($request);
 
-		$this->assertEquals(json_encode($expected), $toolBar->getanchors());
+		$results = json_decode($toolBar->getanchors(), true);
+		$this->assertEquals($expected, $results);
 	}
 
 	public function testHtmlEditorFieldFileLocal() {