diff --git a/artiq/examples/kasli_basic/repository/kasli_tester.py b/artiq/examples/kasli_basic/repository/kasli_tester.py
index e6ba1c68f..f86efe5a0 100644
--- a/artiq/examples/kasli_basic/repository/kasli_tester.py
+++ b/artiq/examples/kasli_basic/repository/kasli_tester.py
@@ -280,14 +280,15 @@ class KasliTester(EnvExperiment):
         zotino.load()
 
     def test_zotinos(self):
-        print("*** Testing Zotino DACs.")
-        print("Voltages:")
-        for card_n, (card_name, card_dev) in enumerate(self.zotinos):
-            voltages = [2*card_n + (-1)**i*0.1*(i//2+1) for i in range(32)]
-            print(card_name, " ".join(["{:.1f}".format(x) for x in voltages]))
-            self.set_zotino_voltages(card_dev, voltages)
-        print("Press ENTER when done.")
-        input()
+        if self.zotinos:
+            print("*** Testing Zotino DACs.")
+            print("Voltages:")
+            for card_n, (card_name, card_dev) in enumerate(self.zotinos):
+                voltages = [2*card_n + (-1)**i*0.1*(i//2+1) for i in range(32)]
+                print(card_name, " ".join(["{:.1f}".format(x) for x in voltages]))
+                self.set_zotino_voltages(card_dev, voltages)
+            print("Press ENTER when done.")
+            input()
 
     @kernel
     def grabber_capture(self, card_dev, rois):