diff --git a/tests/Features/Expect/toHaveSameSize.php b/tests/Features/Expect/toHaveSameSize.php
new file mode 100644
index 00000000..9039f0c1
--- /dev/null
+++ b/tests/Features/Expect/toHaveSameSize.php
@@ -0,0 +1,24 @@
+<?php
+
+use Pest\Exceptions\InvalidExpectationValue;
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('failures with wrong type', function () {
+    expect('foo')->toHaveSameSize([1]);
+})->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [countable|iterable].');
+
+test('pass', function () {
+    expect([1, 2, 3])->toHaveSameSize([4, 5, 6]);
+});
+
+test('failures', function () {
+    expect([1, 2, 3])->toHaveSameSize([1]);
+})->throws(ExpectationFailedException::class);
+
+test('failures with message', function () {
+    expect([1, 2, 3])->toHaveSameSize([1], 'oh no!');
+})->throws(ExpectationFailedException::class, 'oh no!');
+
+test('not failures', function () {
+    expect([1, 2, 3])->not->toHaveSameSize([1]);
+});