diff --git a/tests/Unit/helpers/isPhp.php b/tests/Unit/helpers/isPhp.php
new file mode 100644
index 0000000..78fc487
--- /dev/null
+++ b/tests/Unit/helpers/isPhp.php
@@ -0,0 +1,15 @@
+<?php
+
+uses()->group('helpers');
+
+it('returns true when is php file', function (): void {
+    expect(isPhp('file.php'))->toBeTrue();
+});
+
+it('returns false when is not php file', function (): void {
+    expect(isPhp('file.js'))->toBeFalse();
+});
+
+it('returns false when is dir', function (): void {
+    expect(isPhp('directory'))->toBeFalse();
+});