fixing one more unit test

Signed-off-by: Pedro Tanaka <[email protected]>

Author: pedro-stanaka

pkg/queryfrontend/roundtrip_test.go

@@ -358,6 +358,7 @@ func TestRoundTripSplitIntervalMiddleware(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			tpw, err := NewTripperware(
 				Config{
+					CortexHandlerConfig: &transport.HandlerConfig{},
 					QueryRangeConfig: QueryRangeConfig{
 						Limits:                 defaultLimits,
 						SplitQueriesByInterval: tc.splitInterval,