diff --git a/src/Expectation.php b/src/Expectation.php
index 4aa2eee9..f46053fa 100644
--- a/src/Expectation.php
+++ b/src/Expectation.php
@@ -372,6 +372,46 @@ final class Expectation
         return $this;
     }
 
+    /**
+     * Assert that the value array has the key.
+     */
+    public function toHaveKey(string $key): Expectation
+    {
+        Assert::assertArrayHasKey($key, $this->value);
+
+        return $this;
+    }
+
+    /**
+     * Assert that the value is a directory.
+     */
+    public function toBeDirectory(): Expectation
+    {
+        Assert::assertDirectoryExists($this->value);
+
+        return $this;
+    }
+
+    /**
+     * Assert that the value is a directory and is readable.
+     */
+    public function toBeReadableDirectory(): Expectation
+    {
+        Assert::assertDirectoryIsReadable($this->value);
+
+        return $this;
+    }
+
+    /**
+     * Assert that the value is a directory and is writable.
+     */
+    public function toBeWritableDirectory(): Expectation
+    {
+        Assert::assertDirectoryIsWritable($this->value);
+
+        return $this;
+    }
+
     /**
      * Dynamically calls methods on the class without any arguments.
      *
diff --git a/tests/.snapshots/success.txt b/tests/.snapshots/success.txt
index af19b3e5..cf138b1c 100644
--- a/tests/.snapshots/success.txt
+++ b/tests/.snapshots/success.txt
@@ -24,6 +24,11 @@
    PASS  Tests\Expect\toBeCallable
   ✓ pass
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toBeDirectory
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toBeEmpty
@@ -99,6 +104,11 @@
    PASS  Tests\Expect\toBeObject
   ✓ pass
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toBeReadableDirectory
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toBeResource
@@ -119,6 +129,11 @@
    PASS  Tests\Expect\toBeTrue
   ✓ strict comparisons
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toBeWritableDirectory
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toContain
@@ -140,6 +155,11 @@
    PASS  Tests\Expect\toHaveCount
   ✓ pass
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toHaveKey
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toHaveProperty
@@ -312,5 +332,5 @@
    WARN  Tests\Visual\Success
   - visual snapshot of test suite on success
 
-  Tests:  6 skipped, 183 passed
-  Time:   5.77s
+  Tests:  6 skipped, 195 passed
+  Time:   5.27s
diff --git a/tests/Expect/toBeDirectory.php b/tests/Expect/toBeDirectory.php
new file mode 100644
index 00000000..f30df144
--- /dev/null
+++ b/tests/Expect/toBeDirectory.php
@@ -0,0 +1,17 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function () {
+    $temp = sys_get_temp_dir();
+
+    expect($temp)->toBeDirectory();
+});
+
+test('failures', function () {
+    expect('/random/path/whatever')->toBeDirectory();
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect('.')->not->toBeDirectory();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toBeReadableDirectory.php b/tests/Expect/toBeReadableDirectory.php
new file mode 100644
index 00000000..88f96019
--- /dev/null
+++ b/tests/Expect/toBeReadableDirectory.php
@@ -0,0 +1,15 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function () {
+    expect(sys_get_temp_dir())->toBeWritableDirectory();
+});
+
+test('failures', function () {
+    expect('/random/path/whatever')->toBeWritableDirectory();
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(sys_get_temp_dir())->not->toBeWritableDirectory();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toBeWritableDirectory.php b/tests/Expect/toBeWritableDirectory.php
new file mode 100644
index 00000000..88f96019
--- /dev/null
+++ b/tests/Expect/toBeWritableDirectory.php
@@ -0,0 +1,15 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function () {
+    expect(sys_get_temp_dir())->toBeWritableDirectory();
+});
+
+test('failures', function () {
+    expect('/random/path/whatever')->toBeWritableDirectory();
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(sys_get_temp_dir())->not->toBeWritableDirectory();
+})->throws(ExpectationFailedException::class);
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);