diff --git a/composer.json b/composer.json
index 41e9976..cb1f0ca 100644
--- a/composer.json
+++ b/composer.json
@@ -46,5 +46,11 @@
         "bamarni/composer-bin-plugin": "^1.3",
         "daux/daux.io": "^0.16.0",
         "mikey179/vfsstream": "^1.6"
-    }
+    },
+    "repositories": [
+        {
+            "type": "git",
+            "url": "mensbeam-gitea:MensBeam/HTML-Parser.git"
+        }
+    ]
 }
diff --git a/composer.lock b/composer.lock
index af9ea42..79e761c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,15 +4,15 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c5d8046a2bc8743cc92add9484f3380f",
+    "content-hash": "3371a9b669d02688e062be96d83f1eff",
     "packages": [
         {
             "name": "mensbeam/html-parser",
             "version": "dev-master",
             "source": {
                 "type": "git",
-                "url": "https://code.mensbeam.com/MensBeam/HTML-Parser",
-                "reference": "49764a456743ac69074b4f64619cf87af254c071"
+                "url": "mensbeam-gitea:MensBeam/HTML-Parser.git",
+                "reference": "29127c51ee3b127fb607df4f5518920046df9704"
             },
             "require": {
                 "ext-dom": "*",
@@ -42,7 +42,20 @@
                     "lib/Parser/ctype.php"
                 ]
             },
-            "notification-url": "https://packagist.org/downloads/",
+            "autoload-dev": {
+                "psr-4": {
+                    "MensBeam\\HTML\\Test\\": "tests/lib/",
+                    "MensBeam\\HTML\\TestCase\\": "tests/cases/"
+                }
+            },
+            "scripts": {
+                "post-install-cmd": [
+                    "@composer bin all install"
+                ],
+                "post-update-cmd": [
+                    "@composer bin all update"
+                ]
+            },
             "license": [
                 "MIT"
             ],
@@ -59,7 +72,7 @@
                 }
             ],
             "description": "Parses modern HTML text into a PHP DOMDocument",
-            "time": "2021-09-28T20:15:07+00:00"
+            "time": "2021-10-09T03:23:33+00:00"
         },
         {
             "name": "mensbeam/intl",
diff --git a/lib/Document.php b/lib/Document.php
index 3cd7649..d343a0e 100644
--- a/lib/Document.php
+++ b/lib/Document.php
@@ -67,7 +67,7 @@ class Document extends \DOMDocument {
         return null;
     }
 
-    protected function __set_body(?\DOMNode $value) {
+    protected function __set_body(\DOMNode $value) {
         # On setting, the following algorithm must be run:
         #
         # 1. If the new value is not a body or frameset element, then throw a
diff --git a/lib/traits/Node.php b/lib/traits/Node.php
index 7548579..2498106 100644
--- a/lib/traits/Node.php
+++ b/lib/traits/Node.php
@@ -14,12 +14,12 @@ namespace MensBeam\HTML\DOM;
 trait Node {
     // Disable C14N
     public function C14N($exclusive = null, $with_comments = null, ?array $xpath = null, ?array $ns_prefixes = null): bool {
-        return false;
+        throw new DOMException(DOMException::NOT_SUPPORTED, __CLASS__ . ' is meant for XML and buggy; use Document::saveHTML or cast to a string');
     }
 
     // Disable C14NFile
     public function C14NFile($uri, $exclusive = null, $with_comments = null, ?array $xpath = null, ?array $ns_prefixes = null): bool {
-        return false;
+        throw new DOMException(DOMException::NOT_SUPPORTED, __CLASS__ . ' is meant for XML and buggy; use Document::saveHTMLFile');
     }
 
     public function getRootNode(): ?\DOMNode {
diff --git a/tests/cases/TestChildNode.php b/tests/cases/TestChildNode.php
index 994ee87..68ca69a 100644
--- a/tests/cases/TestChildNode.php
+++ b/tests/cases/TestChildNode.php
@@ -13,7 +13,10 @@ use MensBeam\HTML\DOM\Document;
 
 /** @covers \MensBeam\HTML\DOM\ChildNode */
 class TestChildNode extends \PHPUnit\Framework\TestCase {
-    /** @covers \MensBeam\HTML\DOM\ChildNode::after */
+    /**
+     * @covers \MensBeam\HTML\DOM\ChildNode::after
+     * @covers \MensBeam\HTML\DOM\Node::convertNodesToNode
+     */
     public function testAfter(): void {
         $d = new Document();
         $d->appendChild($d->createElement('html'));
@@ -23,8 +26,8 @@ class TestChildNode extends \PHPUnit\Framework\TestCase {
         $div2 = $d->body->appendChild($d->createElement('div'));
 
         // On node with parent
-        $div->after($d->createElement('span'), $o, $d->createElement('br'));
-        $this->assertSame('<body><div></div><span></span>ook<br><div></div></body>', (string)$d->body);
+        $div->after($d->createElement('span'), $o, 'eek');
+        $this->assertSame('<body><div></div><span></span>ookeek<div></div></body>', (string)$d->body);
         $div->after($o);
 
         // On node with no parent
diff --git a/tests/cases/TestDocument.php b/tests/cases/TestDocument.php
index 2a76c73..6ca04cd 100644
--- a/tests/cases/TestDocument.php
+++ b/tests/cases/TestDocument.php
@@ -121,6 +121,7 @@ class TestDocument extends \PHPUnit\Framework\TestCase {
      * @covers \MensBeam\HTML\DOM\Document::preInsertionValidity
      * @covers \MensBeam\HTML\DOM\Document::replaceTemplates
      * @covers \MensBeam\HTML\DOM\Document::__get_quirksMode
+     * @covers \MensBeam\HTML\DOM\Node::getRootNode
      */
     public function testDocumentCreation(): void {
         // Test null source
diff --git a/tests/cases/TestMagicProperties.php b/tests/cases/TestMagicProperties.php
new file mode 100644
index 0000000..4748b15
--- /dev/null
+++ b/tests/cases/TestMagicProperties.php
@@ -0,0 +1,79 @@
+<?php
+/**
+ * @license MIT
+ * Copyright 2017, Dustin Wilson, J. King et al.
+ * See LICENSE and AUTHORS files for details
+ */
+
+declare(strict_types=1);
+namespace MensBeam\HTML\DOM\TestCase;
+
+use MensBeam\HTML\DOM\{
+    Document,
+    Exception,
+    MagicProperties
+};
+
+
+/** @covers \MensBeam\HTML\DOM\MagicProperties */
+class TestMagicProperties extends \PHPUnit\Framework\TestCase {
+    public function provideFailures(): iterable {
+        return [
+            [ function() {
+                $d = new Document();
+                $d->omgWTFBBQ;
+            }, Exception::NONEXISTENT_PROPERTY ],
+            [ function() {
+                $d = new Document();
+                $d->omgWTFBBQ = 'ook';
+            }, Exception::NONEXISTENT_PROPERTY ],
+            [ function() {
+                $d = new Document();
+                $d->xpath = 'ook';
+            }, Exception::READONLY_PROPERTY ],
+            [ function() {
+                $d = new Document();
+                unset($d->xpath);
+            }, Exception::READONLY_PROPERTY ]
+        ];
+    }
+
+    /**
+     * @dataProvider provideFailures
+     * @covers \MensBeam\HTML\DOM\MagicProperties::__get
+     * @covers \MensBeam\HTML\DOM\MagicProperties::__set
+     * @covers \MensBeam\HTML\DOM\MagicProperties::__unset
+     */
+    public function testFailures(\Closure $closure, int $errorCode): void {
+        $this->expectException(Exception::class);
+        $this->expectExceptionCode($errorCode);
+        $closure();
+    }
+
+    /** @covers \MensBeam\HTML\DOM\MagicProperties::__isset */
+    public function testIsset(): void {
+        $d = new Document();
+        $this->assertTrue(isset($d->body));
+    }
+
+    /** @covers \MensBeam\HTML\DOM\MagicProperties::__unset */
+    public function testUnset(): void {
+        // Nothing allows setting values to null yet, so make one
+        $d = new class {
+            use MagicProperties;
+            protected ?string $_ook = 'ook';
+
+
+            protected function __get_ook(): ?string {
+                return $this->_ook;
+            }
+
+            protected function __set_ook(?string $value): void {
+                $this->_ook = $value;
+            }
+        };
+
+        unset($d->ook);
+        $this->assertNull($d->ook);
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/TestNode.php b/tests/cases/TestNode.php
new file mode 100644
index 0000000..e6ab997
--- /dev/null
+++ b/tests/cases/TestNode.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * @license MIT
+ * Copyright 2017, Dustin Wilson, J. King et al.
+ * See LICENSE and AUTHORS files for details
+ */
+
+declare(strict_types=1);
+namespace MensBeam\HTML\DOM\TestCase;
+
+use MensBeam\HTML\DOM\{
+    Document,
+    DOMException
+};
+use MensBeam\HTML\Parser;
+
+
+/** @covers \MensBeam\HTML\DOM\Node */
+class TestNode extends \PHPUnit\Framework\TestCase {
+    public function provideDisabledMethods(): iterable {
+        return [
+            [ function() {
+                $d = new Document();
+                $d->C14N();
+            } ],
+            [ function() {
+                $d = new Document();
+                $d->C14NFile('fail');
+            } ],
+        ];
+    }
+
+    /**
+     * @dataProvider provideDisabledMethods
+     * @covers \MensBeam\HTML\DOM\Node::C14N
+     * @covers \MensBeam\HTML\DOM\Node::C14NFile
+     */
+    public function testDisabledMethods(\Closure $closure): void {
+        $this->expectException(DOMException::class);
+        $this->expectExceptionCode(DOMException::NOT_SUPPORTED);
+        $closure();
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/TestParentNode.php b/tests/cases/TestParentNode.php
index dd795d6..096ba54 100644
--- a/tests/cases/TestParentNode.php
+++ b/tests/cases/TestParentNode.php
@@ -113,6 +113,7 @@ class TestParentNode extends \PHPUnit\Framework\TestCase {
      * @covers \MensBeam\HTML\DOM\ParentNode::__get_children
      * @covers \MensBeam\HTML\DOM\ParentNode::preInsertionValidity
      * @covers \MensBeam\HTML\DOM\DOMException::__construct
+     * @covers \MensBeam\HTML\DOM\Node::getRootNode
      */
     public function testPreInsertionValidationFailures(\Closure $closure, int $errorCode = DOMException::HIERARCHY_REQUEST_ERROR): void {
         $this->expectException(DOMException::class);
diff --git a/tests/phpunit.dist.xml b/tests/phpunit.dist.xml
index 4d4ce53..cf03ae7 100644
--- a/tests/phpunit.dist.xml
+++ b/tests/phpunit.dist.xml
@@ -23,6 +23,8 @@
       <file>cases/TestElementMap.php</file>
       <file>cases/TestException.php</file>
       <file>cases/TestLeafNode.php</file>
+      <file>cases/TestMagicProperties.php</file>
+      <file>cases/TestNode.php</file>
       <file>cases/TestParentNode.php</file>
     </testsuite>
     <testsuite name="Serializer">