diff --git a/package.json b/package.json
index c022f53..73c0943 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "type": "module",
   "name": "fomod",
   "description": "A library for creating, parsing, editing, and validating XML-based Fomod installers, widely popularized in the Bethesda modding scne",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "main": "dist/index.js",
   "repository": "https://github.com/BellCubeDev/fomod-js/",
   "bugs": {
diff --git a/src/definitions/Fomod.ts b/src/definitions/Fomod.ts
index bbf6bf7..35e86f8 100644
--- a/src/definitions/Fomod.ts
+++ b/src/definitions/Fomod.ts
@@ -97,7 +97,7 @@ export class Fomod<TStrict extends boolean = true> extends XmlRepresentation<TSt
             reason: InvalidityReason.FomodModuleNameMetadataInvalidPosition,
         };
 
-        if (!isNaN(parseInt(this.moduleNameMetadata.colour ?? '2', 16))) return {
+        if (isNaN(parseInt(this.moduleNameMetadata.colour ?? '2', 16))) return {
             tree,
             offendingValue: this.moduleNameMetadata.colour!,
             reason: InvalidityReason.FomodModuleNameMetadataColorHexNotHexNumber,
@@ -115,7 +115,16 @@ export class Fomod<TStrict extends boolean = true> extends XmlRepresentation<TSt
             reason: InvalidityReason.FomodModuleImageMetadataShowImageNotBool,
         };
 
-        // TODO: Require more invalidity reports!
+        for (const step of this.steps) {
+            const reason = step.reasonForInvalidity(...tree);
+            if (reason) return reason;
+        }
+
+        for (const installOrPattern of this.installs) {
+            const reason = installOrPattern.reasonForInvalidity(...tree);
+            if (reason) return reason;
+        }
+
         return null;
     }
 
@@ -207,7 +216,7 @@ export class Fomod<TStrict extends boolean = true> extends XmlRepresentation<TSt
             if (parsed) fomod.installs.add(parsed);
         }
 
-        for (const step of element.querySelectorAll(':scope > installSteps > step')) {
+        for (const step of element.querySelectorAll(':scope > installSteps > installStep')) {
             const parsed = Step.parse(step);
             if (parsed) fomod.steps.add(parsed);
         }
diff --git a/src/definitions/Group.ts b/src/definitions/Group.ts
index 33b88b0..4517ddc 100644
--- a/src/definitions/Group.ts
+++ b/src/definitions/Group.ts
@@ -79,7 +79,7 @@ export class Group<TStrict extends boolean = true> extends XmlRepresentation<TSt
         if (existing && existing instanceof this) return existing;
 
         const name = element.getAttribute('name');
-        const behaviorType = element.getAttribute('behaviorType');
+        const behaviorType = element.getAttribute('type');
 
         const group = new Group<false>(name ?? '', behaviorType ?? '');
         group.assignElement(element);
diff --git a/src/definitions/Install.ts b/src/definitions/Install.ts
index baecb69..1db6365 100644
--- a/src/definitions/Install.ts
+++ b/src/definitions/Install.ts
@@ -7,9 +7,30 @@ import { Verifiable, XmlRepresentation } from "./_core";
 
 
 
-// TODO: Use patorjk ASCII art generator
-// Single-File Install
-
+/***
+ *     $$$$$$\  $$\                     $$\                   $$$$$$$$\ $$\ $$\
+ *    $$  __$$\ \__|                    $$ |                  $$  _____|\__|$$ |
+ *    $$ /  \__|$$\ $$$$$$$\   $$$$$$\  $$ | $$$$$$\          $$ |      $$\ $$ | $$$$$$\
+ *    \$$$$$$\  $$ |$$  __$$\ $$  __$$\ $$ |$$  __$$\ $$$$$$\ $$$$$\    $$ |$$ |$$  __$$\
+ *     \____$$\ $$ |$$ |  $$ |$$ /  $$ |$$ |$$$$$$$$ |\______|$$  __|   $$ |$$ |$$$$$$$$ |
+ *    $$\   $$ |$$ |$$ |  $$ |$$ |  $$ |$$ |$$   ____|        $$ |      $$ |$$ |$$   ____|
+ *    \$$$$$$  |$$ |$$ |  $$ |\$$$$$$$ |$$ |\$$$$$$$\         $$ |      $$ |$$ |\$$$$$$$\
+ *     \______/ \__|\__|  \__| \____$$ |\__| \_______|        \__|      \__|\__| \_______|
+ *                            $$\   $$ |
+ *                            \$$$$$$  |
+ *                             \______/
+ *    $$$$$$\                       $$\               $$\ $$\
+ *    \_$$  _|                      $$ |              $$ |$$ |
+ *      $$ |  $$$$$$$\   $$$$$$$\ $$$$$$\    $$$$$$\  $$ |$$ |
+ *      $$ |  $$  __$$\ $$  _____|\_$$  _|   \____$$\ $$ |$$ |
+ *      $$ |  $$ |  $$ |\$$$$$$\    $$ |     $$$$$$$ |$$ |$$ |
+ *      $$ |  $$ |  $$ | \____$$\   $$ |$$\ $$  __$$ |$$ |$$ |
+ *    $$$$$$\ $$ |  $$ |$$$$$$$  |  \$$$$  |\$$$$$$$ |$$ |$$ |
+ *    \______|\__|  \__|\_______/    \____/  \_______|\__|\__|
+ *
+ *
+ *
+ */
 
 
 
@@ -233,15 +254,6 @@ export class Install<TStrict extends boolean = true> extends XmlRepresentation<T
 
 
 
-
-
-// TODO: Use patorjk ASCII art generator
-// Files Wrapper
-
-
-
-
-
 /***
  *    $$$$$$$$\ $$\ $$\                           $$\      $$\
  *    $$  _____|\__|$$ |                          $$ | $\  $$ |
diff --git a/tests/build-from-scratch.test.ts b/tests/build-from-scratch.test.ts
index 40201e3..d09d17e 100644
--- a/tests/build-from-scratch.test.ts
+++ b/tests/build-from-scratch.test.ts
@@ -1,5 +1,5 @@
 import { Dependencies, Fomod, GameVersionDependency, Group, GroupBehaviorType, Install, InstallPattern, Option, ScriptExtenderVersionDependency, SortingOrder as SortingOrder, Step } from "../src";
-import parseTag from "./parseTag";
+import { parseTag, testValidity } from "./testUtils";
 
 const fomod = new Fomod('That Test Fomod', 'someImage.gif');
 
@@ -40,7 +40,7 @@ fomod.steps.add(step);
 
 // Logging:    InvalidStateError: Invalid attribute localName value
 
-test('Fomod Is Valid', () => expect(fomod.isValid()).toBe(true));
+test('Fomod Is Valid', () => testValidity(fomod));
 
 
 console.log(fomod.asElement(parseTag`<p>`.ownerDocument).outerHTML);
diff --git a/tests/definitions/Dependencies.test.ts b/tests/definitions/Dependencies.test.ts
index 7d0239c..e122aea 100644
--- a/tests/definitions/Dependencies.test.ts
+++ b/tests/definitions/Dependencies.test.ts
@@ -2,8 +2,8 @@
  * @jest-environment jsdom
  */
 
-import { FileDependency, FlagDependency, GameVersionDependency, ModManagerVersionDependency, ScriptExtenderVersionDependency, VersionDependency } from "../../src";
-import parseTag from "../parseTag";
+import { FileDependency, FlagDependency, GameVersionDependency, InvalidityReason, ModManagerVersionDependency, ScriptExtenderVersionDependency, VersionDependency } from "../../src";
+import { parseTag, testValidity } from "../testUtils";
 
 describe('Flag Dependencies', () => {
     const flagName = 'Some Flag 01';
@@ -38,7 +38,7 @@ describe('File Dependencies', () => {
         const element = parseTag`<fileDependency file="appleBanana123" state="Some Odd State" />`;
         const obj = FileDependency.parse(element);
 
-        test('File Dependency Is Invalid', () => expect(obj.isValid()).toBe(false));
+        test('File Dependency Is Invalid', () => testValidity(obj, InvalidityReason.DependencyFileInvalidState));
         test('File Name Is Correct', () => expect(obj.filePath).toBe('appleBanana123'));
         test('Invalid State Is Preserved', () => expect(obj.desiredState).toBe('Some Odd State'));
     });
@@ -47,7 +47,7 @@ describe('File Dependencies', () => {
         const element = parseTag`<fileDependency file="appleBanana456" state="Active" />`;
         const obj = FileDependency.parse(element);
 
-        test('File Dependency Is Valid', () => expect(obj.isValid()).toBe(true));
+        test('File Dependency Is Valid', () => testValidity(obj));
         test('File Name Is Correct', () => expect(obj.filePath).toBe('appleBanana456'));
         test('State Is Correct', () => expect(obj.desiredState).toBe('Active'));
     });
@@ -56,7 +56,7 @@ describe('File Dependencies', () => {
         const element = parseTag`<fileDependency file="appleBanana789" state="Inactive" />`;
         const obj = FileDependency.parse(element);
 
-        test('File Dependency Is Valid', () => expect(obj.isValid()).toBe(true));
+        test('File Dependency Is Valid', () => testValidity(obj));
         test('File Name Is Correct', () => expect(obj.filePath).toBe('appleBanana789'));
         test('State Is Correct', () => expect(obj.desiredState).toBe('Inactive'));
     });
@@ -65,7 +65,7 @@ describe('File Dependencies', () => {
         const element = parseTag`<fileDependency file="appleBanana0-=" state="Missing" />`;
         const obj = FileDependency.parse(element);
 
-        test('File Dependency Is Valid', () => expect(obj.isValid()).toBe(true));
+        test('File Dependency Is Valid', () => testValidity(obj));
         test('File Name Is Correct', () => expect(obj.filePath).toBe('appleBanana0-='));
         test('State Is Correct', () => expect(obj.desiredState).toBe('Missing'));
     });
diff --git a/tests/definitions/Fomod.test.ts b/tests/definitions/Fomod.test.ts
index b891f55..c60a823 100644
--- a/tests/definitions/Fomod.test.ts
+++ b/tests/definitions/Fomod.test.ts
@@ -1,6 +1,6 @@
 import { Fomod } from '../../src';
 
-import parseTag from '../parseTag';
+import { parseTag } from '../testUtils';
 
 
 
@@ -166,6 +166,7 @@ test('Fomod Has Correct Image', () => {
 });
 
 test('Fomod Is Valid', () => {
-    expect(fomod.isValid()).toBe(true);
+    const reason = fomod.reasonForInvalidity();
+    expect(reason).toBe(null);
 });
 
diff --git a/tests/definitions/Install.test.ts b/tests/definitions/Install.test.ts
index 2fd7d86..cce843f 100644
--- a/tests/definitions/Install.test.ts
+++ b/tests/definitions/Install.test.ts
@@ -1,4 +1,4 @@
-import parseTag from '../parseTag';
+import {parseTag} from '../testUtils';
 
 import { Install } from '../../src';
 
diff --git a/tests/parseTag.ts b/tests/parseTag.ts
deleted file mode 100644
index f93e1d1..0000000
--- a/tests/parseTag.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-const parser = new DOMParser();
-
-export default function parseTag(literals: TemplateStringsArray, ...expressions: string[]) {
-    let str = '';
-    literals.forEach((string, i) => {
-        str += string + (expressions[i] ?? '');
-    });
-    const doc = parser.parseFromString(str, 'text/xml');
-    return doc.documentElement;
-}
diff --git a/tests/testUtils.ts b/tests/testUtils.ts
new file mode 100644
index 0000000..efcf5dd
--- /dev/null
+++ b/tests/testUtils.ts
@@ -0,0 +1,28 @@
+import { InvalidityReason, Verifiable } from "../src";
+
+const parser = new DOMParser();
+
+export function parseTag(literals: TemplateStringsArray, ...expressions: string[]) {
+    let str = '';
+    literals.forEach((string, i) => {
+        str += string + (expressions[i] ?? '');
+    });
+    const doc = parser.parseFromString(str, 'text/xml');
+    return doc.documentElement;
+}
+
+/** Ensures the provided Verifiable object is valid. Alternatively, if specified, ensures the provided Verifiable object is invalid and has the specified reason for invalidity.
+ *
+ * Will check that isValid() and reasonForInvalidity() agree, and that the reasonForInvalidity() matches the expected reason. If a mismatch occurs,
+ *
+ * @param v
+ * @param expectedReason
+ */
+export function testValidity(v: Verifiable<boolean>, expectedReason?: InvalidityReason) {
+    const reason = v.reasonForInvalidity();
+    const validity = v.isValid();
+
+    expect(reason).toBe(validity ? null : reason); // Always fail if isValid() and reasonForInvalidity() disagree
+    expect(reason?.reason).toBe(expectedReason);
+    expect(validity).toBe(!expectedReason);
+}