diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
index 341f601a..8b8b5939 100644
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -2,4 +2,3 @@
 
 github: [nunomaduro,owenvoke,olivernybroe,octoper]
 patreon: nunomaduro
-custom: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=66BYDWAT92N6L
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee5a3af9..ab56a6b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [v1.6.0 (2021-06-18)](https://github.com/pestphp/pest/compare/v1.5.0...v1.6.0)
+### Added
+- Adds a new `json` expectation method to improve testing with JSON strings ([#325](https://github.com/pestphp/pest/pull/325))
+- Adds dot notation support to the `toHaveKey` and `toHaveKeys` expectations ([#322](https://github.com/pestphp/pest/pull/322))
+
 ## [v1.5.0 (2021-06-15)](https://github.com/pestphp/pest/compare/v1.4.0...v1.5.0)
 ### Changed
 - Moves plugins from the `require` section to the core itself ([#317](https://github.com/pestphp/pest/pull/317)), ([#318](https://github.com/pestphp/pest/pull/318)), ([#320](https://github.com/pestphp/pest/pull/320))
diff --git a/src/Expectation.php b/src/Expectation.php
index 424f4b60..57a7758a 100644
--- a/src/Expectation.php
+++ b/src/Expectation.php
@@ -6,8 +6,10 @@ namespace Pest;
 
 use BadMethodCallException;
 use Pest\Concerns\Extendable;
+use Pest\Support\Arr;
 use PHPUnit\Framework\Assert;
 use PHPUnit\Framework\Constraint\Constraint;
+use PHPUnit\Framework\ExpectationFailedException;
 use SebastianBergmann\Exporter\Exporter;
 
 /**
@@ -58,6 +60,14 @@ final class Expectation
         return new self($value);
     }
 
+    /**
+     * Creates a new expectation with the decoded JSON value.
+     */
+    public function json(): Expectation
+    {
+        return $this->toBeJson()->and(json_decode($this->value, true));
+    }
+
     /**
      * Dump the expectation value and end the script.
      *
@@ -529,10 +539,16 @@ final class Expectation
             $array = (array) $this->value;
         }
 
-        Assert::assertArrayHasKey($key, $array);
+        try {
+            Assert::assertTrue(Arr::has($array, $key));
+
+            /* @phpstan-ignore-next-line  */
+        } catch (ExpectationFailedException $exception) {
+            throw new ExpectationFailedException("Failed asserting that an array has the key '$key'", $exception->getComparisonFailure());
+        }
 
         if (func_num_args() > 1) {
-            Assert::assertEquals($value, $array[$key]);
+            Assert::assertEquals($value, Arr::get($array, $key));
         }
 
         return $this;
diff --git a/src/Pest.php b/src/Pest.php
index 759cb913..847a15fc 100644
--- a/src/Pest.php
+++ b/src/Pest.php
@@ -6,7 +6,7 @@ namespace Pest;
 
 function version(): string
 {
-    return '1.5.0';
+    return '1.6.0';
 }
 
 function testDirectory(string $file = ''): string
diff --git a/src/Support/Arr.php b/src/Support/Arr.php
new file mode 100644
index 00000000..ef20f862
--- /dev/null
+++ b/src/Support/Arr.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Support;
+
+/**
+ * Credits: most of this class methods and implementations
+ * belongs to the Arr helper of laravel/framework project
+ * (https://github.com/laravel/framework).
+ *
+ * @internal
+ */
+final class Arr
+{
+    /**
+     * @param array<mixed> $array
+     * @param string|int   $key
+     */
+    public static function has(array $array, $key): bool
+    {
+        $key = (string) $key;
+
+        if (array_key_exists($key, $array)) {
+            return true;
+        }
+
+        foreach (explode('.', $key) as $segment) {
+            if (is_array($array) && array_key_exists($segment, $array)) {
+                $array = $array[$segment];
+            } else {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * @param array<mixed> $array
+     * @param string|int   $key
+     * @param null         $default
+     *
+     * @return array|mixed|null
+     */
+    public static function get(array $array, $key, $default = null)
+    {
+        $key = (string) $key;
+
+        if (array_key_exists($key, $array)) {
+            return $array[$key];
+        }
+
+        if (strpos($key, '.') === false) {
+            return $array[$key] ?? $default;
+        }
+
+        foreach (explode('.', $key) as $segment) {
+            if (is_array($array) && array_key_exists($segment, $array)) {
+                $array = $array[$segment];
+            } else {
+                return $default;
+            }
+        }
+
+        return $array;
+    }
+}
diff --git a/tests/.snapshots/success.txt b/tests/.snapshots/success.txt
index 2929bb74..422bfc2f 100644
--- a/tests/.snapshots/success.txt
+++ b/tests/.snapshots/success.txt
@@ -140,6 +140,10 @@
   ✓ it macros true is true with argument
   ✓ it macros false is not true with argument
 
+   PASS  Tests\Features\Expect\json
+  ✓ it properly parses json string
+  ✓ fails with broken json string
+
    PASS  Tests\Features\Expect\not
   ✓ not property calls
 
@@ -152,8 +156,6 @@
   ✓ loops back to the start if it runs out of sequence items
   ✓ it works if the number of items in the iterable is smaller than the number of expectations
   ✓ it works with associative arrays
-  ✓ it can be passed non-callable values
-  ✓ it can be passed a mixture of value types
 
    PASS  Tests\Features\Expect\toBe
   ✓ strict comparisons
@@ -338,8 +340,23 @@
 
    PASS  Tests\Features\Expect\toHaveKey
   ✓ pass
+  ✓ pass with nested key
+  ✓ pass with plain key with dots
+  ✓ pass with value check
+  ✓ pass with value check and nested key
+  ✓ pass with value check and plain key with dots
   ✓ failures
+  ✓ failures with nested key
+  ✓ failures with plain key with dots
+  ✓ fails with wrong value
+  ✓ fails with wrong value and nested key
+  ✓ fails with wrong value and plain key with dots
   ✓ not failures
+  ✓ not failures with nested key
+  ✓ not failures with plain key with dots
+  ✓ not failures with correct value
+  ✓ not failures with correct value and  with nested key
+  ✓ not failures with correct value and  with plain key with dots
 
    PASS  Tests\Features\Expect\toHaveKeys
   ✓ pass
@@ -556,5 +573,5 @@
   ✓ it is a test
   ✓ it uses correct parent class
 
-  Tests:  4 incompleted, 7 skipped, 342 passed
+  Tests:  4 incompleted, 7 skipped, 357 passed
   
\ No newline at end of file
diff --git a/tests/Features/Expect/json.php b/tests/Features/Expect/json.php
new file mode 100644
index 00000000..2228fd56
--- /dev/null
+++ b/tests/Features/Expect/json.php
@@ -0,0 +1,14 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('it properly parses json string', function () {
+    expect('{"name":"Nuno"}')
+        ->json()
+        ->name
+        ->toBe('Nuno');
+});
+
+test('fails with broken json string', function () {
+    expect('{":"Nuno"}')->json();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Features/Expect/toHaveKey.php b/tests/Features/Expect/toHaveKey.php
index 1695688b..01383c91 100644
--- a/tests/Features/Expect/toHaveKey.php
+++ b/tests/Features/Expect/toHaveKey.php
@@ -2,14 +2,68 @@
 
 use PHPUnit\Framework\ExpectationFailedException;
 
-test('pass', function () {
-    expect(['a' => 1, 'b', 'c' => 'world'])->toHaveKey('c');
-});
+$test_array = [
+    'a'             => 1,
+    'b',
+    'c'             => 'world',
+    'd'             => [
+        'e' => 'hello',
+    ],
+    'key.with.dots' => false,
+];
 
-test('failures', function () {
-    expect(['a' => 1, 'b', 'c' => 'world'])->toHaveKey('hello');
+test('pass')->expect($test_array)->toHaveKey('c');
+test('pass with nested key')->expect($test_array)->toHaveKey('d.e');
+test('pass with plain key with dots')->expect($test_array)->toHaveKey('key.with.dots');
+
+test('pass with value check')->expect($test_array)->toHaveKey('c', 'world');
+test('pass with value check and nested key')->expect($test_array)->toHaveKey('d.e', 'hello');
+test('pass with value check and plain key with dots')->expect($test_array)->toHaveKey('key.with.dots', false);
+
+test('failures', function () use ($test_array) {
+    expect($test_array)->toHaveKey('foo');
+})->throws(ExpectationFailedException::class, "Failed asserting that an array has the key 'foo'");
+
+test('failures with nested key', function () use ($test_array) {
+    expect($test_array)->toHaveKey('d.bar');
+})->throws(ExpectationFailedException::class, "Failed asserting that an array has the key 'd.bar'");
+
+test('failures with plain key with dots', function () use ($test_array) {
+    expect($test_array)->toHaveKey('missing.key.with.dots');
+})->throws(ExpectationFailedException::class, "Failed asserting that an array has the key 'missing.key.with.dots'");
+
+test('fails with wrong value', function () use ($test_array) {
+    expect($test_array)->toHaveKey('c', 'bar');
 })->throws(ExpectationFailedException::class);
 
-test('not failures', function () {
-    expect(['a' => 1, 'hello' => 'world', 'c'])->not->toHaveKey('hello');
+test('fails with wrong value and nested key', function () use ($test_array) {
+    expect($test_array)->toHaveKey('d.e', 'foo');
+})->throws(ExpectationFailedException::class);
+
+test('fails with wrong value and plain key with dots', function () use ($test_array) {
+    expect($test_array)->toHaveKey('key.with.dots', true);
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () use ($test_array) {
+    expect($test_array)->not->toHaveKey('c');
+})->throws(ExpectationFailedException::class, "Expecting Array (...) not to have key 'c'");
+
+test('not failures with nested key', function () use ($test_array) {
+    expect($test_array)->not->toHaveKey('d.e');
+})->throws(ExpectationFailedException::class, "Expecting Array (...) not to have key 'd.e'");
+
+test('not failures with plain key with dots', function () use ($test_array) {
+    expect($test_array)->not->toHaveKey('key.with.dots');
+})->throws(ExpectationFailedException::class, "Expecting Array (...) not to have key 'key.with.dots'");
+
+test('not failures with correct value', function () use ($test_array) {
+    expect($test_array)->not->toHaveKey('c', 'world');
+})->throws(ExpectationFailedException::class);
+
+test('not failures with correct value and  with nested key', function () use ($test_array) {
+    expect($test_array)->not->toHaveKey('d.e', 'hello');
+})->throws(ExpectationFailedException::class);
+
+test('not failures with correct value and  with plain key with dots', function () use ($test_array) {
+    expect($test_array)->not->toHaveKey('key.with.dots', false);
 })->throws(ExpectationFailedException::class);
diff --git a/tests/Features/Expect/toHaveKeys.php b/tests/Features/Expect/toHaveKeys.php
index a09c8809..4c29a431 100644
--- a/tests/Features/Expect/toHaveKeys.php
+++ b/tests/Features/Expect/toHaveKeys.php
@@ -3,13 +3,13 @@
 use PHPUnit\Framework\ExpectationFailedException;
 
 test('pass', function () {
-    expect(['a' => 1, 'b', 'c' => 'world'])->toHaveKeys(['a', 'c']);
+    expect(['a' => 1, 'b', 'c' => 'world', 'foo' => ['bar' => 'baz']])->toHaveKeys(['a', 'c', 'foo.bar']);
 });
 
 test('failures', function () {
-    expect(['a' => 1, 'b', 'c' => 'world'])->toHaveKeys(['a', 'd']);
+    expect(['a' => 1, 'b', 'c' => 'world', 'foo' => ['bar' => 'baz']])->toHaveKeys(['a', 'd', 'foo.bar', 'hello.world']);
 })->throws(ExpectationFailedException::class);
 
 test('not failures', function () {
-    expect(['a' => 1, 'hello' => 'world', 'c'])->not->toHaveKeys(['hello', 'c']);
+    expect(['a' => 1, 'b', 'c' => 'world', 'foo' => ['bar' => 'baz']])->not->toHaveKeys(['foo.bar', 'c', 'z']);
 })->throws(ExpectationFailedException::class);