diff --git a/irc/net_test.go b/irc/net_test.go
new file mode 100644
index 00000000..44c5c9fd
--- /dev/null
+++ b/irc/net_test.go
@@ -0,0 +1,45 @@
+package irc
+
+import "testing"
+
+// hostnames from https://github.com/DanielOaks/irc-parser-tests
+var (
+	goodHostnames = []string{
+		"irc.example.com",
+		"i.coolguy.net",
+		"irc-srv.net.uk",
+		"iRC.CooLguY.NeT",
+		"gsf.ds342.co.uk",
+		"324.net.uk",
+		"xn--bcher-kva.ch",
+	}
+
+	badHostnames = []string{
+		"-lol-.net.uk",
+		"-lol.net.uk",
+		"_irc._sctp.lol.net.uk",
+		"irc",
+		"com",
+		"",
+	}
+)
+
+func TestIsHostname(t *testing.T) {
+	for _, name := range goodHostnames {
+		if !IsHostname(name) {
+			t.Error(
+				"Expected to pass, but could not validate hostname",
+				name,
+			)
+		}
+	}
+
+	for _, name := range badHostnames {
+		if IsHostname(name) {
+			t.Error(
+				"Expected to fail, but successfully validated hostname",
+				name,
+			)
+		}
+	}
+}