diff --git a/src/CallableResolver/Exception/CouldNotResolveCallable.php b/src/CallableResolver/Exception/CouldNotResolveCallable.php
index 7ff82b8..2245018 100644
--- a/src/CallableResolver/Exception/CouldNotResolveCallable.php
+++ b/src/CallableResolver/Exception/CouldNotResolveCallable.php
@@ -16,6 +16,26 @@ public static function createFor($value)
 
     private static function printValue($value)
     {
-        return str_replace('  ', '', str_replace("\n", '', print_r($value, true)));
+        return str_replace('  ', '', str_replace("\n", '', print_r(self::convertValue($value), true)));
+    }
+
+    private static function convertValue($value)
+    {
+        if (is_array($value)) {
+            return array_map(function($value){
+                return self::convertObject($value);
+            }, $value);
+        }
+
+        return self::convertObject($value);
+    }
+
+    private static function convertObject($value)
+    {
+        if (is_object($value)) {
+            return get_class($value);
+        }
+
+        return $value;
     }
 }
diff --git a/tests/CallableResolver/ServiceLocatorAwareCallableResolverTest.php b/tests/CallableResolver/ServiceLocatorAwareCallableResolverTest.php
index 7e12677..752c321 100644
--- a/tests/CallableResolver/ServiceLocatorAwareCallableResolverTest.php
+++ b/tests/CallableResolver/ServiceLocatorAwareCallableResolverTest.php
@@ -79,7 +79,24 @@ public function it_fails_if_the_loaded_service_is_not_callable()
 
         $this->setExpectedException(
             'SimpleBus\Message\CallableResolver\Exception\CouldNotResolveCallable',
-            'stdClass Object() could not be resolved to a valid callable'
+            'stdClass could not be resolved to a valid callable'
+        );
+        $this->resolver->resolve('not_a_callable');
+    }
+
+    /**
+     * @test
+     */
+    public function it_fails_if_the_loaded_service_is_not_callable_does_not_list_child_service()
+    {
+        $handler = new \stdClass();
+        $handler->childService = new \stdClass();
+
+        $this->services['not_a_callable'] = $handler;
+
+        $this->setExpectedException(
+            'SimpleBus\Message\CallableResolver\Exception\CouldNotResolveCallable',
+            'stdClass could not be resolved to a valid callable'
         );
         $this->resolver->resolve('not_a_callable');
     }
@@ -93,7 +110,24 @@ public function it_fails_if_the_loaded_service_and_method_array_is_not_callable(
 
         $this->setExpectedException(
             'SimpleBus\Message\CallableResolver\Exception\CouldNotResolveCallable',
-            'Array([0] => stdClass Object()[1] => nonExistingMethod) could not be resolved to a valid callable'
+            'Array([0] => stdClass[1] => nonExistingMethod) could not be resolved to a valid callable'
+        );
+        $this->resolver->resolve(['callable_service_id', 'nonExistingMethod']);
+    }
+
+    /**
+     * @test
+     */
+    public function it_fails_if_the_loaded_service_and_method_array_is_not_callable_does_not_list_child_service()
+    {
+        $handler = new \stdClass();
+        $handler->childService = new \stdClass();
+
+        $this->services['callable_service_id'] = $handler;
+
+        $this->setExpectedException(
+            'SimpleBus\Message\CallableResolver\Exception\CouldNotResolveCallable',
+            'Array([0] => stdClass[1] => nonExistingMethod) could not be resolved to a valid callable'
         );
         $this->resolver->resolve(['callable_service_id', 'nonExistingMethod']);
     }