diff --git a/tests/Expect/toEqualCanonicalizing.php b/tests/Expect/toEqualCanonicalizing.php
new file mode 100644
index 00000000..5e1178b9
--- /dev/null
+++ b/tests/Expect/toEqualCanonicalizing.php
@@ -0,0 +1,16 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function () {
+    expect([1, 2, 3])->toEqualCanonicalizing([3, 1, 2]);
+    expect(['g', 'a', 'z'])->not->toEqualCanonicalizing(['a', 'z']);
+});
+
+test('failures', function () {
+    expect([3, 2, 1])->toEqualCanonicalizing([1, 2]);
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(['a', 'b', 'c'])->not->toEqualCanonicalizing(['b', 'a', 'c']);
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toHaveKey.php b/tests/Expect/toHaveKey.php
new file mode 100644
index 00000000..1695688b
--- /dev/null
+++ b/tests/Expect/toHaveKey.php
@@ -0,0 +1,15 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function () {
+    expect(['a' => 1, 'b', 'c' => 'world'])->toHaveKey('c');
+});
+
+test('failures', function () {
+    expect(['a' => 1, 'b', 'c' => 'world'])->toHaveKey('hello');
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(['a' => 1, 'hello' => 'world', 'c'])->not->toHaveKey('hello');
+})->throws(ExpectationFailedException::class);