diff --git a/.php_cs b/.php_cs
index 725a3035..d163e603 100644
--- a/.php_cs
+++ b/.php_cs
@@ -3,7 +3,6 @@
 $finder = PhpCsFixer\Finder::create()
     ->in(__DIR__ . DIRECTORY_SEPARATOR . 'tests')
     ->in(__DIR__ . DIRECTORY_SEPARATOR . 'bin')
-    ->in(__DIR__ . DIRECTORY_SEPARATOR . 'compiled')
     ->in(__DIR__ . DIRECTORY_SEPARATOR . 'scripts')
     ->in(__DIR__ . DIRECTORY_SEPARATOR . 'stubs')
     ->in(__DIR__ . DIRECTORY_SEPARATOR . 'src')
diff --git a/src/Expectation.php b/src/Expectation.php
index db123468..0aaf2159 100644
--- a/src/Expectation.php
+++ b/src/Expectation.php
@@ -62,6 +62,16 @@ final class Expectation
         return $this;
     }
 
+    /**
+     * Assert the value is true.
+     */
+    public function toBeTrue(): Expectation
+    {
+        Assert::assertTrue($this->value);
+
+        return $this;
+    }
+
     /**
      * Assert the value is false.
      */
@@ -123,54 +133,15 @@ final class Expectation
     /**
      * Assert that needles is an element of value.
      *
-     * @param mixed $needle
+     * @param mixed $value
      */
-    public function toContain($needle): Expectation
+    public function toContain($value): Expectation
     {
-        Assert::assertContains($needle, $this->value);
-
-        return $this;
-    }
-
-    /**
-     * Assert the value contains only variables of type.
-     *
-     * @param mixed $type
-     */
-    public function toContainOnly($type): Expectation
-    {
-        Assert::assertContainsOnly($type, $this->value);
-
-        return $this;
-    }
-
-    /**
-     * Assert the value contains only instances of $instance.
-     */
-    public function toContainOnlyInstancesOf(string $instance): Expectation
-    {
-        Assert::assertContainsOnlyInstancesOf($instance, $this->value);
-
-        return $this;
-    }
-
-    /**
-     * Assert that needles is a substring of value.
-     */
-    public function toContainString(string $needle): Expectation
-    {
-        Assert::assertStringContainsString($needle, $this->value);
-
-        return $this;
-    }
-
-    /**
-     * Assert that needles is a substring of value, ignoring the
-     * difference in casing.
-     */
-    public function toContainStringIgnoringCase(string $needle): Expectation
-    {
-        Assert::assertStringContainsStringIgnoringCase($needle, $this->value);
+        if (is_string($value)) {
+            Assert::assertStringContainsString($value, $this->value);
+        } else {
+            Assert::assertContains($value, $this->value);
+        }
 
         return $this;
     }
@@ -178,7 +149,7 @@ final class Expectation
     /**
      * Assert that $count matches the number of elements of $value.
      */
-    public function toCount(int $count): Expectation
+    public function toHaveCount(int $count): Expectation
     {
         Assert::assertCount($count, $this->value);
 
@@ -234,7 +205,7 @@ final class Expectation
      *
      * @param mixed $value
      */
-    public function toEqualWithDelta($value, float $delta): Expectation
+    public function toBeEqualWithDelta($value, float $delta): Expectation
     {
         Assert::assertEqualsWithDelta($value, $this->value, $delta);
 
@@ -254,11 +225,12 @@ final class Expectation
     /**
      * Assert that the value is an instance of $value.
      *
-     * @param mixed $value
+     * @param string $class
      */
-    public function toBeInstanceOf($value): Expectation
+    public function toBeInstanceOf($class): Expectation
     {
-        Assert::assertInstanceOf($value, $this->value);
+        /* @phpstan-ignore-next-line */
+        Assert::assertInstanceOf($class, $this->value);
 
         return $this;
     }
@@ -384,7 +356,7 @@ final class Expectation
     }
 
     /**
-     * Assert that the value is NAN.
+     * Assert that the value is null.
      */
     public function toBeNull(): Expectation
     {
diff --git a/src/PendingObjects/TestCall.php b/src/PendingObjects/TestCall.php
index e0b7f1c4..a6c9b499 100644
--- a/src/PendingObjects/TestCall.php
+++ b/src/PendingObjects/TestCall.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Pest\PendingObjects;
 
 use Closure;
+use Pest\Expectation;
 use Pest\Factories\TestCaseFactory;
 use Pest\Support\Backtrace;
 use Pest\Support\NullClosure;
@@ -84,6 +85,16 @@ final class TestCall
         return $this;
     }
 
+    /**
+     * Creates a new expectation.
+     *
+     * @param mixed $value the Value
+     */
+    public function expect($value): Expectation
+    {
+        return expect($value);
+    }
+
     /**
      * Sets the test depends.
      */
diff --git a/src/globals.php b/src/globals.php
index 07ec9d6e..59e5e784 100644
--- a/src/globals.php
+++ b/src/globals.php
@@ -108,6 +108,8 @@ function afterAll(Closure $closure = null): void
 
 /**
  * Creates a new expectation.
+ *
+ * @param mixed $value the Value
  */
 function expect($value): Expectation
 {
diff --git a/tests/.snapshots/success.txt b/tests/.snapshots/success.txt
index 916c0d6c..6f9ce702 100644
--- a/tests/.snapshots/success.txt
+++ b/tests/.snapshots/success.txt
@@ -110,31 +110,16 @@
    PASS  Tests\Expect\toBeString
   ✓ pass
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toBeTrue
+  ✓ strict comparisons
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toContain
   ✓ passes
   ✓ failures
-  ✓ not failures
-
-   PASS  Tests\Expect\toContainOnly
-  ✓ pass
-  ✓ failures
-  ✓ not failures
-
-   PASS  Tests\Expect\toContainOnlyInstancesOf
-  ✓ pass
-  ✓ failures
-  ✓ not failures
-
-   PASS  Tests\Expect\toContainString
-  ✓ is case sensitive
-  ✓ failures
-  ✓ not failures
-
-   PASS  Tests\Expect\toContainStringIgnoringCase
-  ✓ ignore difference in casing
-  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toCount
@@ -231,9 +216,9 @@
    PASS  Tests\Features\HigherOrderTests
   ✓ it proxies calls to object
 
-   PASS  Tests\Features\It
+   WARN  Tests\Features\It
   ✓ it is a test
-  ✓ it is a higher order message test
+  ! it is a higher order message test → This test did not perform any assertions  /Users/nunomaduro/pestphp/pest/src/Factories/TestCaseFactory.php(204) : eval()'d code:4
 
    PASS  Tests\Features\Macro
   ✓ it can call chained macro method
@@ -243,8 +228,8 @@
   ✓ it has bar
 
    PASS  Tests\Features\PendingHigherOrderTests
-  ✓ get 'foo' → get 'bar' → assertTrue true
-  ✓ get 'foo' → assertTrue true
+  ✓ get 'foo' → get 'bar'
+  ✓ get 'foo'
 
    WARN  Tests\Features\Skip
   ✓ it do not skips
@@ -255,9 +240,9 @@
   ✓ it do not skips with falsy closure condition
   - it skips with condition and message → skipped because foo
 
-   PASS  Tests\Features\Test
+   WARN  Tests\Features\Test
   ✓ a test
-  ✓ higher order message test
+  ! higher order message test → This test did not perform any assertions  /Users/nunomaduro/pestphp/pest/src/Factories/TestCaseFactory.php(204) : eval()'d code:4
 
    PASS  Tests\Fixtures\DirectoryWithTests\ExampleTest
   ✓ it example 1
@@ -327,5 +312,5 @@
    WARN  Tests\Visual\Success
   - visual snapshot of test suite on success
 
-  Tests:  6 skipped, 192 passed
-  Time:   5.20s
+  Tests:  2 risked, 6 skipped, 181 passed
+  Time:   5.72s
diff --git a/tests/Autoload.php b/tests/Autoload.php
index 9283dbad..1e181ad2 100644
--- a/tests/Autoload.php
+++ b/tests/Autoload.php
@@ -8,7 +8,7 @@ trait PluginTrait
 {
     public function assertPluginTraitGotRegistered(): void
     {
-        assertTrue(true);
+        $this->assertTrue(true);
     }
 }
 
@@ -16,7 +16,7 @@ trait SecondPluginTrait
 {
     public function assertSecondPluginTraitGotRegistered(): void
     {
-        assertTrue(true);
+        $this->assertTrue(true);
     }
 }
 
diff --git a/tests/Expect/toBeTrue.php b/tests/Expect/toBeTrue.php
new file mode 100644
index 00000000..8e998f9b
--- /dev/null
+++ b/tests/Expect/toBeTrue.php
@@ -0,0 +1,15 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('strict comparisons', function () {
+    expect(true)->toBeTrue();
+});
+
+test('failures', function () {
+    expect('')->toBeTrue();
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(false)->not->toBe(false);
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toContainOnly.php b/tests/Expect/toContainOnly.php
deleted file mode 100644
index 2e9fecfe..00000000
--- a/tests/Expect/toContainOnly.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-use PHPUnit\Framework\ExpectationFailedException;
-
-test('pass', function () {
-    expect([1, 2, 3])->toContainOnly('int');
-    expect(['hello', 'world'])->toContainOnly('string');
-});
-
-test('failures', function () {
-    expect([1, 2, '3'])->toContainOnly('string');
-})->throws(ExpectationFailedException::class);
-
-test('not failures', function () {
-    expect([1, 2, 3])->not->toContainOnly('int');
-    expect(['hello', 'world'])->not->toContainOnly('string');
-})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toContainOnlyInstancesOf.php b/tests/Expect/toContainOnlyInstancesOf.php
deleted file mode 100644
index fdda161b..00000000
--- a/tests/Expect/toContainOnlyInstancesOf.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-use Pest\Actions\AddsTests;
-use Pest\Expectation;
-use PHPUnit\Framework\ExpectationFailedException;
-
-test('pass', function () {
-    $expected = [new Expectation('whatever')];
-
-    expect($expected)->toContainOnlyInstancesOf(Expectation::class);
-});
-
-test('failures', function () {
-    $expected = [new Expectation('whatever')];
-
-    expect($expected)->toContainOnlyInstancesOf(AddsTests::class);
-})->throws(ExpectationFailedException::class);
-
-test('not failures', function () {
-    $expected = [new Expectation('whatever')];
-
-    expect($expected)->not->toContainOnlyInstancesOf(Expectation::class);
-})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toContainString.php b/tests/Expect/toContainString.php
deleted file mode 100644
index 03f55b69..00000000
--- a/tests/Expect/toContainString.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-use PHPUnit\Framework\ExpectationFailedException;
-
-test('is case sensitive', function () {
-    expect('hello world')->toContainString('world');
-    expect('hello world')->not->toContainString('World');
-});
-
-test('failures', function () {
-    expect('hello world')->toContainString('Hello');
-})->throws(ExpectationFailedException::class);
-
-test('not failures', function () {
-    expect('hello world')->not->toContainString('hello');
-})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toContainStringIgnoringCase.php b/tests/Expect/toContainStringIgnoringCase.php
deleted file mode 100644
index fc5e1081..00000000
--- a/tests/Expect/toContainStringIgnoringCase.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-use PHPUnit\Framework\ExpectationFailedException;
-
-test('ignore difference in casing', function () {
-    expect('hello world')->toContainStringIgnoringCase('world');
-    expect('hello world')->toContainStringIgnoringCase('World');
-});
-
-test('failures', function () {
-    expect('hello world')->toContainStringIgnoringCase('hi');
-})->throws(ExpectationFailedException::class);
-
-test('not failures', function () {
-    expect('hello world')->not->toContainStringIgnoringCase('Hello');
-    expect('hello world')->not->toContainStringIgnoringCase('hello');
-})->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toCount.php b/tests/Expect/toCount.php
index 6e8d5fcd..a1948260 100644
--- a/tests/Expect/toCount.php
+++ b/tests/Expect/toCount.php
@@ -3,13 +3,13 @@
 use PHPUnit\Framework\ExpectationFailedException;
 
 test('pass', function () {
-    expect([1, 2, 3])->toCount(3);
+    expect([1, 2, 3])->toHaveCount(3);
 });
 
 test('failures', function () {
-    expect([1, 2, 3])->toCount(4);
+    expect([1, 2, 3])->toHaveCount(4);
 })->throws(ExpectationFailedException::class);
 
 test('not failures', function () {
-    expect([1, 2, 3])->not->toCount(3);
+    expect([1, 2, 3])->not->toHaveCount(3);
 })->throws(ExpectationFailedException::class);
diff --git a/tests/Expect/toEqualWithDelta.php b/tests/Expect/toEqualWithDelta.php
index bb78b86d..3faab6e2 100644
--- a/tests/Expect/toEqualWithDelta.php
+++ b/tests/Expect/toEqualWithDelta.php
@@ -3,13 +3,13 @@
 use PHPUnit\Framework\ExpectationFailedException;
 
 test('pass', function () {
-    expect(1.0)->toEqualWithDelta(1.3, .4);
+    expect(1.0)->toBeEqualWithDelta(1.3, .4);
 });
 
 test('failures', function () {
-    expect(1.0)->toEqualWithDelta(1.5, .1);
+    expect(1.0)->toBeEqualWithDelta(1.5, .1);
 })->throws(ExpectationFailedException::class);
 
 test('not failures', function () {
-    expect(1.0)->not->toEqualWithDelta(1.6, .7);
+    expect(1.0)->not->toBeEqualWithDelta(1.6, .7);
 })->throws(ExpectationFailedException::class);
diff --git a/tests/Features/AfterAll.php b/tests/Features/AfterAll.php
index e78e12a5..1b66792e 100644
--- a/tests/Features/AfterAll.php
+++ b/tests/Features/AfterAll.php
@@ -8,8 +8,8 @@ afterAll(function () use ($file) {
 
 test('deletes file after all', function () use ($file) {
     file_put_contents($file, 'foo');
-    assertFileExists($file);
+    $this->assertFileExists($file);
     register_shutdown_function(function () use ($file) {
-        assertFileNotExists($file);
+        $this->assertFileNotExists($file);
     });
 });
diff --git a/tests/Features/AfterEach.php b/tests/Features/AfterEach.php
index 4563e717..5c223833 100644
--- a/tests/Features/AfterEach.php
+++ b/tests/Features/AfterEach.php
@@ -11,10 +11,10 @@ afterEach(function () use ($state) {
 });
 
 it('does not get executed before the test', function () {
-    assertFalse(property_exists($this->state, 'bar'));
+    expect(property_exists($this->state, 'bar'))->toBeFalse();
 });
 
 it('gets executed after the test', function () {
-    assertTrue(property_exists($this->state, 'bar'));
-    assertEquals(2, $this->state->bar);
+    expect(property_exists($this->state, 'bar'))->toBeTrue();
+    expect($this->state->bar)->toBe(2);
 });
diff --git a/tests/Features/BeforeAll.php b/tests/Features/BeforeAll.php
index 4095e68a..e8e458bc 100644
--- a/tests/Features/BeforeAll.php
+++ b/tests/Features/BeforeAll.php
@@ -8,11 +8,11 @@ beforeAll(function () use ($foo) {
 });
 
 it('gets executed before tests', function () use ($foo) {
-    assertEquals($foo->bar, 1);
+    expect($foo->bar)->toBe(1);
 
     $foo->bar = 'changed';
 });
 
 it('do not get executed before each test', function () use ($foo) {
-    assertEquals($foo->bar, 'changed');
+    expect($foo->bar)->toBe('changed');
 });
diff --git a/tests/Features/BeforeEach.php b/tests/Features/BeforeEach.php
index 94c5adc3..a2e70d61 100644
--- a/tests/Features/BeforeEach.php
+++ b/tests/Features/BeforeEach.php
@@ -5,11 +5,11 @@ beforeEach(function () {
 });
 
 it('gets executed before each test', function () {
-    assertEquals($this->bar, 2);
+    expect($this->bar)->toBe(2);
 
     $this->bar = 'changed';
 });
 
 it('gets executed before each test once again', function () {
-    assertEquals($this->bar, 2);
+    expect($this->bar)->toBe(2);
 });
diff --git a/tests/Features/Datasets.php b/tests/Features/Datasets.php
index 35764433..81f41b34 100644
--- a/tests/Features/Datasets.php
+++ b/tests/Features/Datasets.php
@@ -23,13 +23,13 @@ it('sets closures', function () {
         yield [1];
     });
 
-    assertEquals([[1]], iterator_to_array(Datasets::get('foo')()));
+    expect(iterator_to_array(Datasets::get('foo')()))->toBe([[1]]);
 });
 
 it('sets arrays', function () {
     Datasets::set('bar', [[2]]);
 
-    assertEquals([[2]], Datasets::get('bar'));
+    expect(Datasets::get('bar'))->toBe([[2]]);
 });
 
 it('gets bound to test case object', function () {
@@ -37,7 +37,7 @@ it('gets bound to test case object', function () {
 })->with([['a'], ['b']]);
 
 test('it truncates the description', function () {
-    assertTrue(true);
+    expect(true)->toBe(true);
     // it gets tested by the integration test
 })->with([str_repeat('Fooo', 10000000)]);
 
@@ -48,51 +48,51 @@ $datasets = [[1], [2]];
 
 test('lazy datasets', function ($text) use ($state, $datasets) {
     $state->text .= $text;
-    assertTrue(in_array([$text], $datasets));
+    expect(in_array([$text], $datasets))->toBe(true);
 })->with($datasets);
 
 test('lazy datasets did the job right', function () use ($state) {
-    assertEquals('12', $state->text);
+    expect($state->text)->toBe('12');
 });
 
 $state->text = '';
 
 test('eager datasets', function ($text) use ($state, $datasets) {
     $state->text .= $text;
-    assertTrue(in_array([$text], $datasets));
+    expect($datasets)->toContain([$text]);
 })->with(function () use ($datasets) {
     return $datasets;
 });
 
 test('eager datasets did the job right', function () use ($state) {
-    assertEquals('1212', $state->text);
+    expect($state->text)->toBe('1212');
 });
 
 test('lazy registered datasets', function ($text) use ($state, $datasets) {
     $state->text .= $text;
-    assertTrue(in_array([$text], $datasets));
+    expect($datasets)->toContain([$text]);
 })->with('numbers.array');
 
 test('lazy registered datasets did the job right', function () use ($state) {
-    assertEquals('121212', $state->text);
+    expect($state->text)->toBe('121212');
 });
 
 test('eager registered datasets', function ($text) use ($state, $datasets) {
     $state->text .= $text;
-    assertTrue(in_array([$text], $datasets));
+    expect($datasets)->toContain([$text]);
 })->with('numbers.closure');
 
 test('eager registered datasets did the job right', function () use ($state) {
-    assertEquals('12121212', $state->text);
+    expect($state->text)->toBe('12121212');
 });
 
 test('eager wrapped registered datasets', function ($text) use ($state, $datasets) {
     $state->text .= $text;
-    assertTrue(in_array([$text], $datasets));
+    expect($datasets)->toContain([$text]);
 })->with('numbers.closure.wrapped');
 
 test('eager registered wrapped datasets did the job right', function () use ($state) {
-    assertEquals('1212121212', $state->text);
+    expect($state->text)->toBe('1212121212');
 });
 
 class Bar
@@ -105,13 +105,13 @@ $namedDatasets = [
 ];
 
 test('lazy named datasets', function ($text) use ($state, $datasets) {
-    assertTrue(true);
+    expect(true)->toBeTrue();
 })->with($namedDatasets);
 
 $counter = 0;
 
 it('creates unique test case names', function (string $name, Plugin $plugin, bool $bool) use (&$counter) {
-    assertTrue(true);
+    expect(true)->toBeTrue();
     $counter++;
 })->with([
     ['Name 1', new Plugin(), true],
@@ -123,5 +123,5 @@ it('creates unique test case names', function (string $name, Plugin $plugin, boo
 ]);
 
 it('creates unique test case names - count', function () use (&$counter) {
-    assertEquals(6, $counter);
+    expect($counter)->toBe(6);
 });
diff --git a/tests/Features/Depends.php b/tests/Features/Depends.php
index 0e7ed5ea..edab5956 100644
--- a/tests/Features/Depends.php
+++ b/tests/Features/Depends.php
@@ -3,38 +3,32 @@
 $runCounter = 0;
 
 test('first', function () use (&$runCounter) {
-    assertTrue(true);
+    expect(true)->toBeTrue();
     $runCounter++;
 
     return 'first';
 });
 
 test('second', function () use (&$runCounter) {
-    assertTrue(true);
+    expect(true)->toBeTrue();
     $runCounter++;
 
     return 'second';
 });
 
 test('depends', function () {
-    assertEquals(
-        ['first', 'second'],
-        func_get_args()
-    );
+    expect(func_get_args())->toBe(['first', 'second']);
 })->depends('first', 'second');
 
 test('depends with ...params', function (string ...$params) {
-    assertEquals(
-        ['first', 'second'],
-        $params
-    );
+    expect(func_get_args())->toBe($params);
 })->depends('first', 'second');
 
 test('depends with defined arguments', function (string $first, string $second) {
-    assertEquals('first', $first);
-    assertEquals('second', $second);
+    expect($first)->toBe('first');
+    expect($second)->toBe('second');
 })->depends('first', 'second');
 
 test('depends run test only once', function () use (&$runCounter) {
-    assertEquals(2, $runCounter);
+    expect($runCounter)->toBe(2);
 })->depends('first', 'second');
diff --git a/tests/Features/Helpers.php b/tests/Features/Helpers.php
index 24377e00..163ede9d 100644
--- a/tests/Features/Helpers.php
+++ b/tests/Features/Helpers.php
@@ -7,7 +7,7 @@ function addUser()
 
 it('can set/get properties on $this', function () {
     addUser();
-    assertEquals('nuno', $this->user);
+    expect($this->user)->toBe('nuno');
 });
 
 it('throws error if property do not exist', function () {
@@ -27,15 +27,14 @@ function mockUser()
     $mock = test()->createMock(User::class);
 
     $mock->method('getName')
-         ->willReturn('maduro');
+        ->willReturn('maduro');
 
     return $mock;
 }
 
 it('allows to call underlying protected/private methods', function () {
     $user = mockUser();
-
-    assertEquals('maduro', $user->getName());
+    expect($user->getName())->toBe('maduro');
 });
 
 it('throws error if method do not exist', function () {
diff --git a/tests/Features/It.php b/tests/Features/It.php
index 9ab6e384..384e12bd 100644
--- a/tests/Features/It.php
+++ b/tests/Features/It.php
@@ -1,7 +1,7 @@
 <?php
 
 it('is a test', function () {
-    assertArrayHasKey('key', ['key' => 'foo']);
+    $this->assertArrayHasKey('key', ['key' => 'foo']);
 });
 
-it('is a higher order message test')->assertTrue(true);
+it('is a higher order message test')->expect(true)->toBeTrue();
diff --git a/tests/Features/Macro.php b/tests/Features/Macro.php
index fa9f63ee..c0893355 100644
--- a/tests/Features/Macro.php
+++ b/tests/Features/Macro.php
@@ -6,7 +6,7 @@ use PHPUnit\Framework\TestCase;
 uses(Macroable::class);
 
 beforeEach()->macro('bar', function () {
-    assertInstanceOf(TestCase::class, $this);
+    expect($this)->toBeInstanceOf(TestCase::class);
 });
 
 it('can call chained macro method')->bar();
diff --git a/tests/Features/PendingHigherOrderTests.php b/tests/Features/PendingHigherOrderTests.php
index de178c51..cf68dcc6 100644
--- a/tests/Features/PendingHigherOrderTests.php
+++ b/tests/Features/PendingHigherOrderTests.php
@@ -1,11 +1,12 @@
 <?php
 
+use Pest\PendingObjects\TestCall;
 use PHPUnit\Framework\TestCase;
 
 uses(Gettable::class);
 
 /**
- * @return TestCase|Gettable
+ * @return TestCase|TestCall|Gettable
  */
 function get(string $route)
 {
@@ -15,15 +16,15 @@ function get(string $route)
 trait Gettable
 {
     /**
-     * @return TestCase|Gettable
+     * @return TestCase|TestCall|Gettable
      */
     public function get(string $route)
     {
-        assertNotEmpty($route);
+        expect($route)->not->toBeEmpty();
 
         return $this;
     }
 }
 
-get('foo')->get('bar')->assertTrue(true);
-get('foo')->assertTrue(true);
+get('foo')->get('bar')->expect(true)->toBeTrue();
+get('foo')->expect(true)->toBeTrue();
diff --git a/tests/Features/Test.php b/tests/Features/Test.php
index d2e53ed0..e3334305 100644
--- a/tests/Features/Test.php
+++ b/tests/Features/Test.php
@@ -1,7 +1,7 @@
 <?php
 
 test('a test', function () {
-    assertArrayHasKey('key', ['key' => 'foo']);
+    $this->assertArrayHasKey('key', ['key' => 'foo']);
 });
 
-test('higher order message test')->assertTrue(true);
+test('higher order message test')->expect(true)->toBeTrue();
diff --git a/tests/Features/TestCycle.php b/tests/Features/TestCycle.php
index d941dcf2..efca9588 100644
--- a/tests/Features/TestCycle.php
+++ b/tests/Features/TestCycle.php
@@ -20,8 +20,8 @@ afterAll(function () {
 });
 
 register_shutdown_function(function () use ($foo) {
-    assertFalse($foo->beforeAll);
-    assertFalse($foo->beforeEach);
-    assertFalse($foo->afterEach);
-    assertFalse($foo->afterAll);
+    expect($foo->beforeAll)->toBeFalse();
+    expect($foo->beforeEach)->toBeFalse();
+    expect($foo->afterEach)->toBeFalse();
+    expect($foo->afterAll)->toBeFalse();
 });
diff --git a/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder/SubFolder/CustomTestCaseInSubFolder.php b/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder/SubFolder/CustomTestCaseInSubFolder.php
index 2cd2999d..ee6b1489 100644
--- a/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder/SubFolder/CustomTestCaseInSubFolder.php
+++ b/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder/SubFolder/CustomTestCaseInSubFolder.php
@@ -10,6 +10,6 @@ class CustomTestCaseInSubFolder extends TestCase
 {
     public function assertCustomInSubFolderTrue()
     {
-        assertTrue(true);
+        $this->assertTrue(true);
     }
 }
diff --git a/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder2/UsesPerFile.php b/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder2/UsesPerFile.php
index e0673174..8e582bcf 100644
--- a/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder2/UsesPerFile.php
+++ b/tests/PHPUnit/CustomTestCaseInSubFolders/SubFolder2/UsesPerFile.php
@@ -12,7 +12,7 @@ class MyCustomClass extends PHPUnit\Framework\TestCase
 {
     public function assertTrueIsTrue()
     {
-        assertTrue(true);
+        $this->assertTrue(true);
     }
 }
 
diff --git a/tests/Playground.php b/tests/Playground.php
index e24277b1..be30ae7d 100644
--- a/tests/Playground.php
+++ b/tests/Playground.php
@@ -1,5 +1,5 @@
 <?php
 
 test('basic', function () {
-    assertTrue(true);
+    expect(true)->toBeTrue();
 });
diff --git a/tests/Unit/Actions/AddsDefaults.php b/tests/Unit/Actions/AddsDefaults.php
index 7a55adc5..eef7b027 100644
--- a/tests/Unit/Actions/AddsDefaults.php
+++ b/tests/Unit/Actions/AddsDefaults.php
@@ -7,14 +7,14 @@ use PHPUnit\TextUI\DefaultResultPrinter;
 it('sets defaults', function () {
     $arguments = AddsDefaults::to(['bar' => 'foo']);
 
-    assertInstanceOf(Printer::class, $arguments['printer']);
-    assertEquals($arguments['bar'], 'foo');
+    expect($arguments['printer'])->toBeInstanceOf(Printer::class);
+    expect($arguments['bar'])->toBe('foo');
 });
 
 it('does not override options', function () {
     $defaultResultPrinter = new DefaultResultPrinter();
 
-    assertEquals(AddsDefaults::to(['printer' => $defaultResultPrinter]), [
+    expect(AddsDefaults::to(['printer' => $defaultResultPrinter]))->tobe([
         'printer' => $defaultResultPrinter,
     ]);
 });
diff --git a/tests/Unit/Actions/AddsTests.php b/tests/Unit/Actions/AddsTests.php
index 925e3574..9f1beec0 100644
--- a/tests/Unit/Actions/AddsTests.php
+++ b/tests/Unit/Actions/AddsTests.php
@@ -16,10 +16,10 @@ test('default php unit tests', function () {
     $phpUnitTestCase = new class() extends PhpUnitTestCase {
     };
     $testSuite->addTest($phpUnitTestCase);
-    assertCount(1, $testSuite->tests());
+    expect($testSuite->tests())->toHaveCount(1);
 
     AddsTests::to($testSuite, new \Pest\TestSuite(getcwd()));
-    assertCount(1, $testSuite->tests());
+    expect($testSuite->tests())->toHaveCount(1);
 });
 
 it('removes warnings', function () use ($pestTestCase) {
@@ -28,5 +28,5 @@ it('removes warnings', function () use ($pestTestCase) {
     $testSuite->addTest($warningTestCase);
 
     AddsTests::to($testSuite, new \Pest\TestSuite(getcwd()));
-    assertCount(0, $testSuite->tests());
+    expect($testSuite->tests())->toHaveCount(0);
 });
diff --git a/tests/Unit/Actions/ValidatesConfiguration.php b/tests/Unit/Actions/ValidatesConfiguration.php
index 24edc4f0..a26a4105 100644
--- a/tests/Unit/Actions/ValidatesConfiguration.php
+++ b/tests/Unit/Actions/ValidatesConfiguration.php
@@ -38,5 +38,5 @@ it('do not throws exception when `process isolation` is false', function () {
         'configuration' => $filename,
     ]);
 
-    assertTrue(true);
+    expect(true)->toBeTrue();
 });
diff --git a/tests/Unit/Plugins/Version.php b/tests/Unit/Plugins/Version.php
index 0bd19052..0bd5feb7 100644
--- a/tests/Unit/Plugins/Version.php
+++ b/tests/Unit/Plugins/Version.php
@@ -8,7 +8,7 @@ it('outputs the version when --version is used', function () {
     $plugin = new Version($output);
 
     $plugin->handleArguments(['foo', '--version']);
-    assertStringContainsString('Pest    0.2.2', $output->fetch());
+    expect($output->fetch())->toContain('Pest    0.2.2');
 });
 
 it('do not outputs version when --version is not used', function () {
@@ -16,5 +16,5 @@ it('do not outputs version when --version is not used', function () {
     $plugin = new Version($output);
 
     $plugin->handleArguments(['foo', 'bar']);
-    assertEquals('', $output->fetch());
+    expect($output->fetch())->toBe('');
 });
diff --git a/tests/Unit/Support/Backtrace.php b/tests/Unit/Support/Backtrace.php
index 55886512..6dba0ed5 100644
--- a/tests/Unit/Support/Backtrace.php
+++ b/tests/Unit/Support/Backtrace.php
@@ -7,5 +7,5 @@ it('gets file name from called file', function () {
         return Backtrace::file();
     };
 
-    assertEquals(__FILE__, $a());
+    expect($a())->toBe(__FILE__);
 });
diff --git a/tests/Unit/Support/Container.php b/tests/Unit/Support/Container.php
index 13a369ff..f42ba030 100644
--- a/tests/Unit/Support/Container.php
+++ b/tests/Unit/Support/Container.php
@@ -15,32 +15,32 @@ it('exists')
 
 it('gets an instance', function () {
     $this->container->add(Container::class, $this->container);
-    assertSame($this->container, $this->container->get(Container::class));
+    expect($this->container->get(Container::class))->toBe($this->container);
 });
 
 test('autowire', function () {
-    assertInstanceOf(Container::class, $this->container->get(Container::class));
+    expect($this->container->get(Container::class))->toBeInstanceOf(Container::class);
 });
 
 it('creates an instance and resolves parameters', function () {
     $this->container->add(Container::class, $this->container);
     $instance = $this->container->get(ClassWithDependency::class);
 
-    assertInstanceOf(ClassWithDependency::class, $instance);
+    expect($instance)->toBeInstanceOf(ClassWithDependency::class);
 });
 
 it('creates an instance and resolves also sub parameters', function () {
     $this->container->add(Container::class, $this->container);
     $instance = $this->container->get(ClassWithSubDependency::class);
 
-    assertInstanceOf(ClassWithSubDependency::class, $instance);
+    expect($instance)->toBeInstanceOf(ClassWithSubDependency::class);
 });
 
 it('can resolve builtin value types', function () {
     $this->container->add('rootPath', getcwd());
 
     $instance = $this->container->get(TestSuite::class);
-    assertInstanceOf(TestSuite::class, $instance);
+    expect($instance)->toBeInstanceOf(TestSuite::class);
 });
 
 it('cannot resolve a parameter without type', function () {
diff --git a/tests/Unit/Support/Reflection.php b/tests/Unit/Support/Reflection.php
index 56d5515a..7ad76b0d 100644
--- a/tests/Unit/Support/Reflection.php
+++ b/tests/Unit/Support/Reflection.php
@@ -3,9 +3,10 @@
 use Pest\Support\Reflection;
 
 it('gets file name from closure', function () {
-    $fileName = Reflection::getFileNameFromClosure(function () {});
+    $fileName = Reflection::getFileNameFromClosure(function () {
+    });
 
-    assertEquals(__FILE__, $fileName);
+    expect($fileName)->toBe(__FILE__);
 });
 
 it('gets property values', function () {
@@ -15,5 +16,5 @@ it('gets property values', function () {
 
     $value = Reflection::getPropertyValue($class, 'foo');
 
-    assertEquals('bar', $value);
+    expect($value)->toBe('bar');
 });
diff --git a/tests/Visual/SingleTestOrDirectory.php b/tests/Visual/SingleTestOrDirectory.php
index 893caf3a..ef5ab6fa 100644
--- a/tests/Visual/SingleTestOrDirectory.php
+++ b/tests/Visual/SingleTestOrDirectory.php
@@ -10,7 +10,7 @@ $run = function (string $target, $decorated = false) {
     return $decorated ? $process->getOutput() : preg_replace('#\\x1b[[][^A-Za-z]*[A-Za-z]#', '', $process->getOutput());
 };
 
-$snapshot  = function ($name) {
+$snapshot = function ($name) {
     $testsPath = dirname(__DIR__);
 
     return file_get_contents(implode(DIRECTORY_SEPARATOR, [
@@ -21,23 +21,15 @@ $snapshot  = function ($name) {
 };
 
 test('allows to run a single test', function () use ($run, $snapshot) {
-    assertStringContainsString(
-        $snapshot('allows-to-run-a-single-test'),
-        $run('tests/Fixtures/DirectoryWithTests/ExampleTest.php'));
+    expect($run('tests/Fixtures/DirectoryWithTests/ExampleTest.php'))->toContain($snapshot('allows-to-run-a-single-test'));
 })->skip(PHP_OS_FAMILY === 'Windows');
 
 test('allows to run a directory', function () use ($run, $snapshot) {
-    assertStringContainsString(
-        $snapshot('allows-to-run-a-directory'),
-        $run('tests/Fixtures')
-    );
+    expect($run('tests/Fixtures'))->toContain($snapshot('allows-to-run-a-directory'));
 })->skip(PHP_OS_FAMILY === 'Windows');
 
 it('has ascii chars', function () use ($run, $snapshot) {
-    assertStringContainsString(
-        $snapshot('has-ascii-chars'),
-        $run('tests/Fixtures/DirectoryWithTests/ExampleTest.php', true)
-    );
+    expect($run('tests/Fixtures/DirectoryWithTests/ExampleTest.php', true))->toContain($snapshot('has-ascii-chars'));
 })->skip(PHP_OS_FAMILY === 'Windows');
 
 it('disable decorating printer when colors is set to never', function () use ($snapshot) {
@@ -49,9 +41,5 @@ it('disable decorating printer when colors is set to never', function () use ($s
     ], dirname(__DIR__, 2));
     $process->run();
     $output = $process->getOutput();
-
-    assertStringContainsString(
-        $snapshot('disable-decorating-printer'),
-        $output
-    );
+    expect($output)->toContain($snapshot('disable-decorating-printer'));
 })->skip(PHP_OS_FAMILY === 'Windows');
diff --git a/tests/Visual/Success.php b/tests/Visual/Success.php
index 97cbee6a..a4f5fae6 100644
--- a/tests/Visual/Success.php
+++ b/tests/Visual/Success.php
@@ -22,7 +22,7 @@ test('visual snapshot of test suite on success', function () {
         $output = explode("\n", $output());
         array_pop($output);
         array_pop($output);
-        assertStringContainsString(implode("\n", $output), file_get_contents($snapshot));
+        expect(file_get_contents($snapshot))->toContain(implode("\n", $output));
     }
 })->skip(!getenv('REBUILD_SNAPSHOTS') && getenv('EXCLUDE'))
     ->skip(PHP_OS_FAMILY === 'Windows');