diff --git a/.changeset/lazy-seas-tan.md b/.changeset/lazy-seas-tan.md
new file mode 100644
index 0000000..c685267
--- /dev/null
+++ b/.changeset/lazy-seas-tan.md
@@ -0,0 +1,5 @@
+---
+"@crbroughton/ts-test-utils": minor
+---
+
+Add the isArray and isNonArray - Checks if a type is either an array or not an array
diff --git a/.github/workflows/bun.yml b/.github/workflows/bun.yml
new file mode 100644
index 0000000..883ddac
--- /dev/null
+++ b/.github/workflows/bun.yml
@@ -0,0 +1,34 @@
+name: Bun Tests
+
+env:
+  VERSION: v1.10.2
+
+on:
+  push:
+    branches: [develop, master]
+  pull_request:
+    branches: [develop, master]
+jobs:
+  bun_test:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+      - name: Install dependencies
+        run: bun install
+      - name: Run unit tests
+        run: bun test
+      - name: Run typechecker
+        run: bun run typecheck
+      - uses: actions/upload-artifact@v3
+        if: always()
+        with:
+          name: bun-report
+          path: bun-report/
+          retention-days: 30
diff --git a/bun.lockb b/bun.lockb
index e6a39ea..41dee90 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/index.ts b/index.ts
index 9412e8d..e7465b5 100644
--- a/index.ts
+++ b/index.ts
@@ -11,3 +11,7 @@ export type Excludes<T, U> = [T] extends [U] ? false : true
 export type Assignable<T, U extends T> = U extends T ? true : false
 
 export type Extends<T, U> = U extends T ? true : false
+
+export type isArray<T> = T extends any[] ? true : false
+
+export type isNonArray<T> = isArray<T> extends true ? false : true
diff --git a/package.json b/package.json
index d132d78..22e721e 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,8 @@
     "dist"
   ],
   "scripts": {
-    "build": "bun run build.ts",
+    "typecheck": "tsc --skipLibCheck --noEmit",
+    "build": "bun run typecheck && bun run build.ts",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
     "changeset": "npx changeset",
diff --git a/tests/Extends.test.ts b/tests/Extends.test.ts
index 18fa93e..3163106 100644
--- a/tests/Extends.test.ts
+++ b/tests/Extends.test.ts
@@ -9,12 +9,9 @@ describe('Extends tests', () => {
     type Result = Expect<Extends<BaseType, ExtensionType>>
     //   ^?
   })
-  it('Failed the includes test when the resulting type does not include the sub-type', () => {
+  it('Failed the extends test when the resulting type does not extend the sub-type', () => {
     // @ts-expect-error - Object / Record failing the equality checker
-    type Result = Expect<Includes<{ id: number, name: string }, { hobby: string }>>
+    type Result = Expect<Extends<{ id: number, name: string }, { hobby: string }>>
     //   ^?
   })
 })
-
-
-
diff --git a/tests/isArray.test.ts b/tests/isArray.test.ts
new file mode 100644
index 0000000..8d55c8a
--- /dev/null
+++ b/tests/isArray.test.ts
@@ -0,0 +1,15 @@
+/* eslint-disable unused-imports/no-unused-vars */
+import { describe, it } from 'bun:test'
+import type { Expect, isArray } from '../index'
+
+describe('isArray tests', () => {
+  it('Passes the isArray test when the type is an array', () => {
+    type Result = Expect<isArray<{ id: number }[]>>
+    //   ^?
+  })
+  it('Failed the isArray test when the type is not an array', () => {
+    // @ts-expect-error - Fails the exclusion
+    type Result = Expect<isArray<{ id: string }>>
+    //   ^?
+  })
+})