diff --git a/mxresolv/mxresolv_test.go b/mxresolv/mxresolv_test.go
index 368c4a5..c12a654 100644
--- a/mxresolv/mxresolv_test.go
+++ b/mxresolv/mxresolv_test.go
@@ -164,10 +164,6 @@ func TestLookup(t *testing.T) {
 		inDomainName:  "test-mx-ipv6.definbox.com",
 		outMXHosts:    []string{"::ffff:2296:b0e1"},
 		outImplicitMX: false,
-	}, {
-		inDomainName:  "arenhp.co.uk",
-		outMXHosts:    []string{"arenhp.co.uk"},
-		outImplicitMX: false,
 	}} {
 		t.Run(tc.inDomainName, func(t *testing.T) {
 			defer mxresolv.SetDeterministic()()