diff --git a/src/Result/Testing/IsErr.php b/src/Result/Testing/IsErr.php
index 14228ba..f89cbcf 100644
--- a/src/Result/Testing/IsErr.php
+++ b/src/Result/Testing/IsErr.php
@@ -5,6 +5,7 @@
 namespace Superscript\Monads\Result\Testing;
 
 use PHPUnit\Framework\Constraint\Constraint;
+use PHPUnit\Util\Exporter;
 use Superscript\Monads\Result\Result;
 
 final class IsErr extends Constraint
@@ -21,6 +22,6 @@ public function matches(mixed $other): bool
 
     protected function failureDescription(mixed $other): string
     {
-        return sprintf('%s %s', $this->exporter()->export($other), $this->toString());
+        return sprintf('%s %s', Exporter::export($other), $this->toString());
     }
 }
diff --git a/src/Result/Testing/IsOk.php b/src/Result/Testing/IsOk.php
index 5be3f43..713bafd 100644
--- a/src/Result/Testing/IsOk.php
+++ b/src/Result/Testing/IsOk.php
@@ -5,6 +5,7 @@
 namespace Superscript\Monads\Result\Testing;
 
 use PHPUnit\Framework\Constraint\Constraint;
+use PHPUnit\Util\Exporter;
 use Superscript\Monads\Result\Result;
 
 final class IsOk extends Constraint
@@ -21,6 +22,6 @@ public function matches(mixed $other): bool
 
     protected function failureDescription(mixed $other): string
     {
-        return sprintf('%s %s', $this->exporter()->export($other), $this->toString());
+        return sprintf('%s %s', Exporter::export($other), $this->toString());
     }
 }