diff --git a/src/Expectation.php b/src/Expectation.php
index 2e581802..89d86f53 100644
--- a/src/Expectation.php
+++ b/src/Expectation.php
@@ -221,15 +221,16 @@ final class Expectation
     }
 
     /**
-     * It skips the tests in the callback if the condition is not truthy.
+     * Apply the callback if the given "condition" is truthy.
      *
-     * @param Closure|bool|string $condition
+     * @param  (callable(): bool)|bool $condition
+     * @param callable(Expectation<TValue>): mixed $callback
      */
     public function when($condition, callable $callback): Expectation
     {
         $condition = is_callable($condition)
             ? $condition
-            : function () use ($condition) {
+            : static function () use ($condition): mixed {
                 return $condition;
             };
 
diff --git a/src/PendingObjects/TestCall.php b/src/PendingObjects/TestCall.php
index be839bff..287ca7a9 100644
--- a/src/PendingObjects/TestCall.php
+++ b/src/PendingObjects/TestCall.php
@@ -78,6 +78,26 @@ final class TestCall
         return $this;
     }
 
+    /**
+     * Asserts that the test throws the given `$exceptionClass` when called if the given condition is true.
+     *
+     * @param (callable(): bool)|bool $condition
+     */
+    public function throwsIf($condition, string $exception, string $exceptionMessage = null): TestCall
+    {
+        $condition = is_callable($condition)
+            ? $condition
+            : static function () use ($condition): mixed {
+                return $condition;
+            };
+
+        if ($condition()) {
+            return $this->throws($exception, $exceptionMessage);
+        }
+
+        return $this;
+    }
+
     /**
      * Runs the current test multiple times with
      * each item of the given `iterable`.
diff --git a/tests/.snapshots/success.txt b/tests/.snapshots/success.txt
index 07f7c56a..2e201e93 100644
--- a/tests/.snapshots/success.txt
+++ b/tests/.snapshots/success.txt
@@ -107,6 +107,11 @@
   ✓ it catch exceptions
   ✓ it catch exceptions and messages
   ✓ it can just define the message
+  ✓ it not catch exceptions if given condition is false
+  ✓ it catch exceptions if given condition is true
+  ✓ it catch exceptions and messages if given condition is true
+  ✓ it can just define the message if given condition is true
+  ✓ it can just define the message if given condition is 1
 
    PASS  Tests\Features\Expect\HigherOrder\methods
   ✓ it can access methods
@@ -701,5 +706,5 @@
   ✓ it is a test
   ✓ it uses correct parent class
 
-  Tests:  4 incompleted, 9 skipped, 463 passed
+  Tests:  4 incompleted, 9 skipped, 459 passed
   
\ No newline at end of file
diff --git a/tests/Features/Exceptions.php b/tests/Features/Exceptions.php
index 37eaaeb9..9970c2a9 100644
--- a/tests/Features/Exceptions.php
+++ b/tests/Features/Exceptions.php
@@ -17,3 +17,23 @@ it('catch exceptions and messages', function () {
 it('can just define the message', function () {
     throw new Exception('Something bad happened');
 })->throws('Something bad happened');
+
+it('not catch exceptions if given condition is false', function () {
+    $this->assertTrue(true);
+})->throwsIf(false, Exception::class);
+
+it('catch exceptions if given condition is true', function () {
+    throw new Exception('Something bad happened');
+})->throwsIf(function () { return true; }, Exception::class);
+
+it('catch exceptions and messages if given condition is true', function () {
+    throw new Exception('Something bad happened');
+})->throwsIf(true, Exception::class, 'Something bad happened');
+
+it('can just define the message if given condition is true', function () {
+    throw new Exception('Something bad happened');
+})->throwsIf(true, 'Something bad happened');
+
+it('can just define the message if given condition is 1', function () {
+    throw new Exception('Something bad happened');
+})->throwsIf(1, 'Something bad happened');