diff --git a/artiq/test/gateware/test_sawg_fe.py b/artiq/test/gateware/test_sawg_fe.py
index 5efbfa329..d18e1876d 100644
--- a/artiq/test/gateware/test_sawg_fe.py
+++ b/artiq/test/gateware/test_sawg_fe.py
@@ -180,8 +180,8 @@ class SAWGTest(unittest.TestCase):
             plt.plot(out)
             plt.show()
 
-    # @unittest.skip("needs artiq.sim.time.TimeManager tweak for "
-    #                "reverse timeline jumps")
+    @unittest.skip("needs artiq.sim.time.TimeManager tweak for "
+                   "reverse timeline jumps")
     def test_demo_2tone(self):
         MHz = 1e-3
         ns = 1.