diff --git a/tests/SprykerTest/Shared/Testify/_support/Helper/ClassResolverTrait.php b/tests/SprykerTest/Shared/Testify/_support/Helper/ClassResolverTrait.php
index cd6ddec..21e429d 100644
--- a/tests/SprykerTest/Shared/Testify/_support/Helper/ClassResolverTrait.php
+++ b/tests/SprykerTest/Shared/Testify/_support/Helper/ClassResolverTrait.php
@@ -73,8 +73,9 @@ protected function getClassNameCandidates(string $classNamePattern, string $modu
     {
         $classNameFromConfiguration = $this->getClassNameFromConfiguration($classNamePattern, $moduleName);
 
+        $config = Configuration::config();
+
         if (!$applicationName) {
-            $config = Configuration::config();
             $namespaceParts = explode('\\', $config['namespace']);
             // When `application` is configured in the codeception.yml use this value instead of guessing it.
             $applicationName = $config['application'] ?? $namespaceParts[1];
@@ -83,6 +84,12 @@ protected function getClassNameCandidates(string $classNamePattern, string $modu
         $classNameCandidates = [];
         $classNameCandidates[] = $classNameFromConfiguration;
 
+        if (isset($config['projectNamespaces']) && is_array($config['projectNamespaces'])) {
+            foreach ($config['projectNamespaces'] as $projectNamespace) {
+                $classNameCandidates[] = sprintf($classNamePattern, $projectNamespace, $applicationName, $moduleName);
+            }
+        }
+
         foreach ($this->coreNamespaces as $coreNamespace) {
             $classNameCandidates[] = sprintf($classNamePattern, $coreNamespace, $applicationName, $moduleName);
         }