diff --git a/tests/test_plugin.py b/tests/test_plugin.py
index 1f2d5a6f1..744862670 100644
--- a/tests/test_plugin.py
+++ b/tests/test_plugin.py
@@ -2982,6 +2982,87 @@ def test_commando_listrunes(node_factory):
     assert not_our_rune['our_rune'] is False
 
 
+def test_commando_blacklist(node_factory):
+    l1, l2 = node_factory.get_nodes(2)
+
+    l2.connect(l1)
+    rune0 = l1.rpc.commando_rune()
+    assert rune0['unique_id'] == '0'
+    rune1 = l1.rpc.commando_rune()
+    assert rune1['unique_id'] == '1'
+
+    # Make sure runes work!
+    assert l2.rpc.call(method='commando',
+                       payload={'peer_id': l1.info['id'],
+                                'rune': rune0['rune'],
+                                'method': 'getinfo',
+                                'params': []})['id'] == l1.info['id']
+
+    assert l2.rpc.call(method='commando',
+                       payload={'peer_id': l1.info['id'],
+                                'rune': rune1['rune'],
+                                'method': 'getinfo',
+                                'params': []})['id'] == l1.info['id']
+
+    blacklist = l1.rpc.commando_blacklist(start=1)
+    assert blacklist == {'blacklist': [{'start': 1, 'end': 1}]}
+
+    # Make sure rune id 1 does not work!
+    with pytest.raises(RpcError, match='Not authorized: Blacklisted rune'):
+        assert l2.rpc.call(method='commando',
+                           payload={'peer_id': l1.info['id'],
+                                    'rune': rune1['rune'],
+                                    'method': 'getinfo',
+                                    'params': []})['id'] == l1.info['id']
+
+    # But, other rune still works!
+    assert l2.rpc.call(method='commando',
+                       payload={'peer_id': l1.info['id'],
+                                'rune': rune0['rune'],
+                                'method': 'getinfo',
+                                'params': []})['id'] == l1.info['id']
+
+    blacklist = l1.rpc.commando_blacklist(start=2)
+    assert blacklist == {'blacklist': [{'start': 1, 'end': 2}]}
+
+    blacklist = l1.rpc.commando_blacklist(start=6)
+    assert blacklist == {'blacklist': [{'start': 1, 'end': 2},
+                                       {'start': 6, 'end': 6}]}
+
+    blacklist = l1.rpc.commando_blacklist(start=3, end=5)
+    assert blacklist == {'blacklist': [{'start': 1, 'end': 6}]}
+
+    blacklist = l1.rpc.commando_blacklist(start=9)
+    assert blacklist == {'blacklist': [{'start': 1, 'end': 6},
+                                       {'start': 9, 'end': 9}]}
+
+    blacklist = l1.rpc.commando_blacklist(start=0)
+    assert blacklist == {'blacklist': [{'start': 0, 'end': 6},
+                                       {'start': 9, 'end': 9}]}
+
+    # Now both runes fail!
+    with pytest.raises(RpcError, match='Not authorized: Blacklisted rune'):
+        assert l2.rpc.call(method='commando',
+                           payload={'peer_id': l1.info['id'],
+                                    'rune': rune0['rune'],
+                                    'method': 'getinfo',
+                                    'params': []})['id'] == l1.info['id']
+
+    with pytest.raises(RpcError, match='Not authorized: Blacklisted rune'):
+        assert l2.rpc.call(method='commando',
+                           payload={'peer_id': l1.info['id'],
+                                    'rune': rune1['rune'],
+                                    'method': 'getinfo',
+                                    'params': []})['id'] == l1.info['id']
+
+    blacklist = l1.rpc.commando_blacklist()
+    assert blacklist == {'blacklist': [{'start': 0, 'end': 6},
+                                       {'start': 9, 'end': 9}]}
+
+    blacklisted_rune = l1.rpc.commando_listrunes(rune='geZmO6U7yqpHn-moaX93FVMVWrDRfSNY4AXx9ypLcqg9MQ==')['runes'][0]['blacklisted']
+    assert blacklisted_rune is True
+
+
 def test_commando_stress(node_factory, executor):
     """Stress test to slam commando with many large queries"""
     nodes = node_factory.get_nodes(5)