diff --git a/src/Persistence/Reflection/RuntimeReflectionProperty.php b/src/Persistence/Reflection/RuntimeReflectionProperty.php
index 595ffc74..6c53f8df 100644
--- a/src/Persistence/Reflection/RuntimeReflectionProperty.php
+++ b/src/Persistence/Reflection/RuntimeReflectionProperty.php
@@ -9,6 +9,7 @@
 use ReflectionProperty;
 use ReturnTypeWillChange;
 
+use function ltrim;
 use function method_exists;
 
 /**
@@ -26,7 +27,7 @@ public function __construct(string $class, string $name)
     {
         parent::__construct($class, $name);
 
-        $this->key = $this->isPrivate() ? "\0" . $class . "\0" . $name : ($this->isProtected() ? "\0*\0" . $name : $name);
+        $this->key = $this->isPrivate() ? "\0" . ltrim($class, '\\') . "\0" . $name : ($this->isProtected() ? "\0*\0" . $name : $name);
     }
 
     /**
diff --git a/tests/Persistence/RuntimeReflectionPropertyTest.php b/tests/Persistence/RuntimeReflectionPropertyTest.php
index 6733f166..606163a3 100644
--- a/tests/Persistence/RuntimeReflectionPropertyTest.php
+++ b/tests/Persistence/RuntimeReflectionPropertyTest.php
@@ -36,6 +36,7 @@ public function testGetSetValue(string $name, string $value): void
 
         self::assertSame($value, $reflProperty->getValue($object));
 
+        $reflProperty->setAccessible(true);
         $reflProperty->setValue($object, 'changedValue');
 
         self::assertSame('changedValue', $reflProperty->getValue($object));
@@ -46,6 +47,7 @@ public function testGetSetValue(string $name, string $value): void
      *
      * @testWith ["Doctrine\\Tests\\Persistence\\RuntimeReflectionPropertyTestProxyMock"]
      *           ["Doctrine\\Tests\\Persistence\\RuntimeReflectionPropertyTestCommonProxyMock"]
+     *           ["\\Doctrine\\Tests\\Persistence\\RuntimeReflectionPropertyTestProxyMock"]
      */
     public function testGetValueOnProxyProperty(string $proxyClass): void
     {
@@ -245,5 +247,10 @@ class RuntimeReflectionPropertyTestClass
     public $test = 'testValue';
 
     /** @var string|null */
-    public $privateTest = 'privateTestValue';
+    private $privateTest = 'privateTestValue';
+
+    public function getPrivateTest(): ?string
+    {
+        return $this->privateTest;
+    }
 }