diff --git a/src/compat/function/identity.spec.ts b/src/compat/function/identity.spec.ts
new file mode 100644
index 000000000..375f2c654
--- /dev/null
+++ b/src/compat/function/identity.spec.ts
@@ -0,0 +1,27 @@
+import { describe, expect, it } from 'vitest';
+import { identity } from '../../function';
+
+describe('identity', () => {
+  it('should return the input value unchanged for a number', () => {
+    expect(identity(5)).toBe(5);
+  });
+
+  it('should return the input value unchanged for a string', () => {
+    expect(identity('hello')).toBe('hello');
+  });
+
+  it('should return the input value unchanged for an object', () => {
+    const obj = { key: 'value' };
+    expect(identity(obj)).toBe(obj);
+  });
+
+  it('should return the input value unchanged for an array', () => {
+    const arr = [1, 2, 3];
+    expect(identity(arr)).toBe(arr);
+  });
+
+  it('should return the input value unchanged for a boolean', () => {
+    expect(identity(true)).toBe(true);
+    expect(identity(false)).toBe(false);
+  });
+});
diff --git a/src/compat/function/noop.spec.ts b/src/compat/function/noop.spec.ts
new file mode 100644
index 000000000..5e4b2d716
--- /dev/null
+++ b/src/compat/function/noop.spec.ts
@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest';
+import { noop } from '../../function';
+
+describe('noop', () => {
+  it('should be a function', () => {
+    expect(typeof noop).toBe('function');
+  });
+
+  it('should return undefined', () => {
+    expect(noop()).toBeUndefined();
+  });
+});