diff --git a/tests/Unit/Promise/FunctionAllTestCase.php b/tests/Unit/Promise/FunctionAllTestCase.php
new file mode 100644
index 00000000..7944f081
--- /dev/null
+++ b/tests/Unit/Promise/FunctionAllTestCase.php
@@ -0,0 +1,106 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Promise;
+
+use React\Promise\Deferred;
+use Temporal\Promise;
+use Temporal\Tests\Unit\Promise\BaseFunction;
+
+/**
+ * Got from reactphp/promise and modified
+ * @license MIT
+ * @link https://github.com/reactphp/promise/blob/f913fb8cceba1e6644b7b90c4bfb678ed8a3ef38/tests/FunctionAllTest.php
+ */
+final class FunctionAllTestCase extends BaseFunction
+{
+    public function testResolveEmptyInput(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo([]));
+
+        Promise::all([])
+            ->then($mock);
+    }
+
+    public function testResolveValuesArray(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo([1, 2, 3]));
+
+        Promise::all([1, 2, 3])
+            ->then($mock);
+    }
+
+    public function testResolvePromisesArray(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo([1, 2, 3]));
+
+        Promise::all([Promise::resolve(1), Promise::resolve(2), Promise::resolve(3)])
+            ->then($mock);
+    }
+
+    public function testResolveSparseArrayInput(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo([null, 1, null, 1, 1]));
+
+        Promise::all([null, 1, null, 1, 1])
+            ->then($mock);
+    }
+
+    public function testRejectIfAnyInputPromiseRejects(): void
+    {
+        $e = new \Exception();
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo($e));
+
+        Promise::all([Promise::resolve(1), Promise::reject($e), Promise::resolve(3)])
+            ->then($this->expectCallableNever(), $mock);
+    }
+
+    public function testAcceptAPromiseForAnArray(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo([1, 2, 3]));
+
+        Promise::all([Promise::resolve(1), Promise::resolve(2), Promise::resolve(3)])
+            ->then($mock);
+    }
+
+    public function testPreserveTheOrderOfArrayWhenResolvingAsyncPromises(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo([1, 2, 3]));
+
+        $deferred = new Deferred();
+
+        Promise::all([Promise::resolve(1), $deferred->promise(), Promise::resolve(3)])
+            ->then($mock);
+
+        $deferred->resolve(2);
+    }
+}
diff --git a/tests/Unit/Promise/FunctionAnyTestCase.php b/tests/Unit/Promise/FunctionAnyTestCase.php
new file mode 100644
index 00000000..e7e6792d
--- /dev/null
+++ b/tests/Unit/Promise/FunctionAnyTestCase.php
@@ -0,0 +1,166 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Promise;
+
+use React\Promise\Deferred;
+use React\Promise\Exception\LengthException;
+use Temporal\Internal\Promise\Reasons;
+use Temporal\Promise;
+use Temporal\Tests\Unit\Promise\BaseFunction;
+
+/**
+ * Got from reactphp/promise and modified
+ * @license MIT
+ * @link https://github.com/reactphp/promise/blob/f913fb8cceba1e6644b7b90c4bfb678ed8a3ef38/tests/FunctionAnyTest.php
+ */
+final class FunctionAnyTestCase extends BaseFunction
+{
+    public function testRejectWithLengthExceptionWithEmptyInputArray(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with(
+                $this->callback(function ($exception) {
+                    return $exception instanceof LengthException &&
+                        'Input array must contain at least 1 item but contains only 0 items.' === $exception->getMessage();
+                })
+            );
+
+        Promise::any([])
+            ->then($this->expectCallableNever(), $mock);
+    }
+
+    public function testResolveWithAnInputValue(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo(1));
+
+        Promise::any([1, 2, 3])
+            ->then($mock);
+    }
+
+    public function testResolveWithAPromisedInputValue(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo(1));
+
+        Promise::any([Promise::resolve(1), Promise::resolve(2), Promise::resolve(3)])
+            ->then($mock);
+    }
+
+    public function testRejectWithAllRejectedInputValuesIfAllInputsAreRejected(): void
+    {
+        $e1 = new \Exception();
+        $e2 = new \Exception();
+        $e3 = new \Exception();
+
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->callback(fn (Reasons $e): bool => \iterator_to_array($e) === [0 => $e1, 1 => $e2, 2 => $e3]));
+
+        Promise::any([Promise::reject($e1), Promise::reject($e2), Promise::reject($e3)])
+            ->then($this->expectCallableNever(), $mock);
+    }
+
+    public function testResolveWhenFirstInputPromiseResolves(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo(1));
+
+        Promise::any([Promise::resolve(1), Promise::reject(new \Exception()), Promise::reject(new \Exception())])
+            ->then($mock);
+    }
+
+    public function testNotRelyOnArryIndexesWhenUnwrappingToASingleResolutionValue(): void
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with($this->identicalTo(2));
+
+        $d1 = new Deferred();
+        $d2 = new Deferred();
+
+        Promise::any(['abc' => $d1->promise(), 1 => $d2->promise()])
+            ->then($mock);
+
+        $d2->resolve(2);
+        $d1->resolve(1);
+    }
+
+    public function testRejectWhenInputPromiseRejects(): void
+    {
+        $e = new \Exception();
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke')
+            // ->with($this->identicalTo(null));
+            ->with($this->callback(fn (Reasons $reason): bool => \iterator_to_array($reason) === [$e]));
+
+        Promise::any([Promise::reject($e)])
+            ->then($this->expectCallableNever(), $mock)
+            ->then(null, fn(\Throwable $e) => null);
+    }
+
+    public function testCancelInputPromise(): void
+    {
+        $mock = $this->creteCancellableMock();
+        $mock
+            ->expects($this->once())
+            ->method('cancel');
+
+        Promise::any([$mock])->cancel();
+    }
+
+    public function testCancelInputArrayPromises(): void
+    {
+        $mock1 = $this->creteCancellableMock();
+        $mock1
+            ->expects($this->once())
+            ->method('cancel');
+
+        $mock2 = $this->creteCancellableMock();
+        $mock2
+            ->expects($this->once())
+            ->method('cancel');
+
+        Promise::any([$mock1, $mock2])->cancel();
+    }
+
+    public function testNotCancelOtherPendingInputArrayPromisesIfOnePromiseFulfills(): void
+    {
+        $e = new \Exception();
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->never())
+            ->method('__invoke');
+
+
+        $deferred = new Deferred($mock);
+        $deferred->resolve($e);
+
+        $mock2 = $this->creteCancellableMock();
+        $mock2
+            ->expects($this->never())
+            ->method('cancel');
+
+        Promise::some([$deferred->promise(), $mock2], 1)->cancel();
+    }
+}
diff --git a/tests/Unit/Promise/FunctionReduceTestCase.php b/tests/Unit/Promise/FunctionReduceTestCase.php
index 70fec9a4..9ebe9499 100644
--- a/tests/Unit/Promise/FunctionReduceTestCase.php
+++ b/tests/Unit/Promise/FunctionReduceTestCase.php
@@ -13,7 +13,7 @@
  * @license MIT
  * @link https://github.com/reactphp/promise/blob/f913fb8cceba1e6644b7b90c4bfb678ed8a3ef38/tests/FunctionReduceTest.php
  */
-class FunctionReduceTestCase extends BaseFunction
+final class FunctionReduceTestCase extends BaseFunction
 {
     public function testReduceValuesWithoutInitialValue(): void
     {
diff --git a/tests/Unit/Promise/FunctionSomeTestCase.php b/tests/Unit/Promise/FunctionSomeTestCase.php
index 0b1d4aca..0d98abf0 100644
--- a/tests/Unit/Promise/FunctionSomeTestCase.php
+++ b/tests/Unit/Promise/FunctionSomeTestCase.php
@@ -16,7 +16,7 @@
  * @license MIT
  * @link https://github.com/reactphp/promise/blob/f913fb8cceba1e6644b7b90c4bfb678ed8a3ef38/tests/FunctionSomeTest.php
  */
-class FunctionSomeTestCase extends BaseFunction
+final class FunctionSomeTestCase extends BaseFunction
 {
     public function testRejectWithLengthExceptionWithEmptyInputArray(): void
     {