diff --git a/basetest.py b/basetest.py
index c402cea..791c606 100644
--- a/basetest.py
+++ b/basetest.py
@@ -30,9 +30,9 @@ def prepare_zpools():
     subprocess.check_call("modprobe brd rd_size=512000", shell=True)
 
     #remove old stuff
-    subprocess.call("zpool destroy test_source1", shell=True)
-    subprocess.call("zpool destroy test_source2", shell=True)
-    subprocess.call("zpool destroy test_target1", shell=True)
+    subprocess.call("zpool destroy test_source1 2>/dev/null", shell=True)
+    subprocess.call("zpool destroy test_source2 2>/dev/null", shell=True)
+    subprocess.call("zpool destroy test_target1 2>/dev/null", shell=True)
 
     #create pools
     subprocess.check_call("zpool create test_source1 /dev/ram0", shell=True)
diff --git a/test_zfsautobackup.py b/test_zfsautobackup.py
index 21e4aaa..239121b 100644
--- a/test_zfsautobackup.py
+++ b/test_zfsautobackup.py
@@ -8,4 +8,8 @@ class TestZfsAutobackup(unittest.TestCase):
         return super().setUp()
 
     def  test_defaults(self):
-        self.assertFalse(ZfsAutobackup("test test_target1".split(" ")).run())
+        with self.subTest("defaults with full verbose and debug"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --debug".split(" ")).run())
+
+        with self.subTest("bare defaults"):
+            self.assertFalse(ZfsAutobackup("test test_target1".split(" ")).run())