diff --git a/tests/utils.spec.ts b/tests/utils.spec.ts
new file mode 100644
index 0000000..a88019b
--- /dev/null
+++ b/tests/utils.spec.ts
@@ -0,0 +1,51 @@
+import { describe, expect, it } from "bun:test";
+import { getAvx2 } from "../src/utils";
+
+describe("getAvx2", () => {
+  it("should return false when called with os: 'windows' and arch: 'arm64'", () => {
+    const result = getAvx2("windows", "arm64");
+    expect(result).toBe(false);
+  });
+
+  it("should return false when called with os: 'windows' and arch: 'aarch64'", () => {
+    const result = getAvx2("windows", "aarch64");
+    expect(result).toBe(false);
+  });
+
+  it("should return false when called with os: 'windows', arch: 'arm64', and avx2: true", () => {
+    const result = getAvx2("windows", "arm64", true);
+    expect(result).toBe(false);
+  });
+
+  it("should return false when called with os: 'windows', arch: 'aarch64', and avx2: false", () => {
+    const result = getAvx2("windows", "aarch64", false);
+    expect(result).toBe(false);
+  });
+
+  it("should return the provided avx2 value (true) when specified and not on Windows ARM64", () => {
+    expect(getAvx2("linux", "x64", true)).toBe(true);
+    expect(getAvx2("darwin", "x64", true)).toBe(true);
+    expect(getAvx2("windows", "x64", true)).toBe(true);
+  });
+
+  it("should return the provided avx2 value (false) when specified and not on Windows ARM64", () => {
+    expect(getAvx2("linux", "x64", false)).toBe(false);
+    expect(getAvx2("darwin", "x64", false)).toBe(false);
+    expect(getAvx2("windows", "x64", false)).toBe(false);
+  });
+
+  it("should return true by default when avx2 is not specified and not on Windows ARM64", () => {
+    expect(getAvx2("linux", "x64")).toBe(true);
+    expect(getAvx2("darwin", "x64")).toBe(true);
+    expect(getAvx2("windows", "x64")).toBe(true);
+    expect(getAvx2("linux", "arm64")).toBe(true);
+    expect(getAvx2("darwin", "aarch64")).toBe(true);
+  });
+
+  it("should return true by default for non-Windows platforms with ARM architecture", () => {
+    expect(getAvx2("linux", "arm64")).toBe(true);
+    expect(getAvx2("linux", "aarch64")).toBe(true);
+    expect(getAvx2("darwin", "arm64")).toBe(true);
+    expect(getAvx2("darwin", "aarch64")).toBe(true);
+  });
+});