diff --git a/tests/test_gen_rack.py b/tests/test_gen_rack.py
index b061f7f..39924b6 100644
--- a/tests/test_gen_rack.py
+++ b/tests/test_gen_rack.py
@@ -384,6 +384,14 @@ def test_validate_links_rejects_peer_port_over_count():
         gen_rack.validate_links(items, hw_index)
 
 
+def test_validate_links_rejects_peer_port_below_one():
+    items = [item(hostname="mf01", rack_u=2, u_height=1, rack_face="front",
+                  links=[{"local": "eth0", "peer": "sw01", "peer_port": 0}])]
+    hw_index = {"sw01": item(hostname="sw01", kind="switch", ports=24)}
+    with pytest.raises(gen_rack.SchemaError):
+        gen_rack.validate_links(items, hw_index)
+
+
 def test_validate_links_accepts_peer_without_ports():
     items = [item(hostname="mf01", rack_u=2, u_height=1, rack_face="front",
                   links=[{"local": "eth0", "peer": "rtr01", "peer_port": 99}])]