diff --git a/lib/cdist/test/emulator/__init__.py b/lib/cdist/test/emulator/__init__.py
index c0037b68..f1ea5832 100644
--- a/lib/cdist/test/emulator/__init__.py
+++ b/lib/cdist/test/emulator/__init__.py
@@ -79,7 +79,7 @@ class EmulatorTestCase(test.CdistTestCase):
         os.environ.update(self.env)
         os.environ['require'] = '__file'
         emu = emulator.Emulator(argv)
-        self.assertRaises(emulator.IllegalRequirementError, emu.run)
+        self.assertRaises(core.IllegalObjectIdError, emu.run)
 
     def test_singleton_object_requirement(self):
         argv = ['__file', '/tmp/foobar']