diff --git a/tests/integration/instances/virtualbox.py b/tests/integration/instances/virtualbox.py
index 8e37e17..07c2a1e 100644
--- a/tests/integration/instances/virtualbox.py
+++ b/tests/integration/instances/virtualbox.py
@@ -115,7 +115,6 @@ class VirtualBoxInstance(Instance):
 			return self.unlock()
 
 		def lock(self):
-			self.unlock()
 			self.machine.lock_machine(self.session, vboxapi.library.LockType.write)
 			return self.session.machine