diff --git a/test/net/addr/ip.cpp b/test/net/addr/ip.cpp
index 7296a1d..74e72b2 100644
--- a/test/net/addr/ip.cpp
+++ b/test/net/addr/ip.cpp
@@ -153,4 +153,14 @@
     std::hash<InAnyAddr>{}(In6Addr{});
 }
 
+TEST(FromStr, InAnyAddr)
+{
+    constexpr FromStr<InAnyAddr> fs;
+    EXPECT_EQ((In4Addr{}), fs("0.0.0.0"sv));
+    EXPECT_EQ((In6Addr{}), fs("::"sv));
+    EXPECT_EQ(
+        (In6Addr{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 192, 168, 0, 1}),
+        fs("::ffff:192.168.0.1"sv));
+}
+
 } // namespace stdplus