diff --git a/src/Expectation.php b/src/Expectation.php
index cb9b0361..8579da04 100644
--- a/src/Expectation.php
+++ b/src/Expectation.php
@@ -13,6 +13,7 @@ use Pest\Arch\Expectations\ToOnlyBeUsedIn;
 use Pest\Arch\Expectations\ToOnlyUse;
 use Pest\Arch\Expectations\ToUse;
 use Pest\Arch\Expectations\ToUseNothing;
+use Pest\Arch\Expectations\ToUseStrictTypes;
 use Pest\Concerns\Extendable;
 use Pest\Concerns\Pipeable;
 use Pest\Concerns\Retrievable;
@@ -369,6 +370,16 @@ final class Expectation
         return ToUse::make($this, $targets);
     }
 
+    /**
+     * Asserts that the given expectation target use the "declare(strict_types=1)" declaration.
+     *
+     * @param  array<int, string>|string  $targets
+     */
+    public function toUseStrictTypes(): ArchExpectation
+    {
+        return ToUseStrictTypes::make($this);
+    }
+
     /**
      * Asserts that the given expectation target "only" use on the given dependencies.
      *
diff --git a/src/Expectations/OppositeExpectation.php b/src/Expectations/OppositeExpectation.php
index 327676db..57e0193d 100644
--- a/src/Expectations/OppositeExpectation.php
+++ b/src/Expectations/OppositeExpectation.php
@@ -5,15 +5,19 @@ declare(strict_types=1);
 namespace Pest\Expectations;
 
 use Pest\Arch\Contracts\ArchExpectation;
+use Pest\Arch\Exceptions\ArchExpectationFailedException;
+use Pest\Arch\Expectations\NotToUseStrictTypes;
 use Pest\Arch\Expectations\ToBeUsedIn;
 use Pest\Arch\Expectations\ToBeUsedInNothing;
 use Pest\Arch\Expectations\ToUse;
+use Pest\Arch\Expectations\ToUseStrictTypes;
 use Pest\Arch\GroupArchExpectation;
 use Pest\Arch\SingleArchExpectation;
 use Pest\Exceptions\InvalidExpectation;
 use Pest\Expectation;
 use Pest\Support\Arr;
 use Pest\Support\Exporter;
+use PHPUnit\Framework\AssertionFailedError;
 use PHPUnit\Framework\ExpectationFailedException;
 
 /**
@@ -71,6 +75,14 @@ final class OppositeExpectation
         ), is_string($targets) ? [$targets] : $targets));
     }
 
+    /**
+     * Asserts that the given expectation target does not use the "declare(strict_types=1)" declaration.
+     */
+    public function toUseStrictTypes(): ArchExpectation
+    {
+        return ToUseStrictTypes::make($this->original, false);
+    }
+
     /**
      * @param  array<int, string>|string  $targets
      */
@@ -128,7 +140,7 @@ final class OppositeExpectation
         try {
             /* @phpstan-ignore-next-line */
             $this->original->{$name}(...$arguments);
-        } catch (ExpectationFailedException) {
+        } catch (ExpectationFailedException|AssertionFailedError) {
             return $this->original;
         }