diff --git a/test/test_ethernet_interface.cpp b/test/test_ethernet_interface.cpp
index 21062f4..74768c1 100644
--- a/test/test_ethernet_interface.cpp
+++ b/test/test_ethernet_interface.cpp
@@ -96,6 +96,19 @@
 
 TEST_F(TestEthernetInterface, AddIPAddress)
 {
+    EXPECT_THROW(createIPObject(IP::Protocol::IPv4, "127.0.0.1", 16),
+                 InvalidArgument);
+    EXPECT_THROW(createIPObject(IP::Protocol::IPv4, "127.0.0.1", 32),
+                 InvalidArgument);
+    EXPECT_THROW(createIPObject(IP::Protocol::IPv4, "192.168.1.1", 0),
+                 InvalidArgument);
+    EXPECT_THROW(createIPObject(IP::Protocol::IPv6, "::1", 64),
+                 InvalidArgument);
+    EXPECT_THROW(createIPObject(IP::Protocol::IPv6, "::", 128),
+                 InvalidArgument);
+    EXPECT_THROW(createIPObject(IP::Protocol::IPv6, "fe80::1", 0),
+                 InvalidArgument);
+
     createIPObject(IP::Protocol::IPv4, "10.10.10.10", 16);
     EXPECT_THAT(interface.addrs, UnorderedElementsAre(Key(stdplus::SubnetAny(
                                      stdplus::In4Addr{10, 10, 10, 10}, 16))));