diff --git a/target/route_test.go b/target/route_test.go
index 1e2b7b7..30f15a5 100644
--- a/target/route_test.go
+++ b/target/route_test.go
@@ -42,7 +42,7 @@ func TestRoute_ServeHTTP(t *testing.T) {
 		{Route{Dst: "2.2.2.2/world", Flags: FlagAbs | FlagSecureMode}, "https://2.2.2.2/world"},
 		{Route{Dst: "api.example.com/world", Flags: FlagAbs | FlagSecureMode | FlagForwardHost}, "https://api.example.com/world"},
 		{Route{Dst: "api.example.org/world", Flags: FlagAbs | FlagSecureMode | FlagForwardAddr}, "https://api.example.org/world"},
-		{Route{Dst: "3.3.3.3/headers", Flags: FlagAbs, Headers: http.Header{"X-Other": []string{"test value"}}}, "http://3.3.3.3/headers"},
+		{Route{Dst: "3.3.3.3/headers", Flags: FlagAbs, Headers: http.Header{"X-Other": []string{"test value"}, "X-Violet-Loop-Detect": []string{"1"}}}, "http://3.3.3.3/headers"},
 	}
 	for _, i := range a {
 		pt := &proxyTester{}