diff --git a/pkg/issuer/acme/http/httproute_test.go b/pkg/issuer/acme/http/httproute_test.go
index 061bfee19..3bf470164 100644
--- a/pkg/issuer/acme/http/httproute_test.go
+++ b/pkg/issuer/acme/http/httproute_test.go
@@ -5,6 +5,8 @@ import (
 	"reflect"
 	"testing"
 
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/utils/diff"
 	gwapi "sigs.k8s.io/gateway-api/apis/v1"
 
 	cmacme "github.com/cert-manager/cert-manager/pkg/apis/acme/v1"
@@ -112,3 +114,59 @@ func TestGetGatewayHTTPRouteForChallenge(t *testing.T) {
 		})
 	}
 }
+
+func TestEnsureGatewayHTTPRoute(t *testing.T) {
+	tests := map[string]solverFixture{
+		"should update challenge httproute if service changes": {
+			Challenge: &cmacme.Challenge{
+				Spec: cmacme.ChallengeSpec{
+					DNSName: "example.com",
+					Solver: cmacme.ACMEChallengeSolver{
+						HTTP01: &cmacme.ACMEChallengeSolverHTTP01{
+							GatewayHTTPRoute: &cmacme.ACMEChallengeSolverHTTP01GatewayHTTPRoute{},
+						},
+					},
+				},
+			},
+			PreFn: func(t *testing.T, s *solverFixture) {
+				_, err := s.Solver.createGatewayHTTPRoute(context.TODO(), s.Challenge, "anotherfakeservice")
+				if err != nil {
+					t.Errorf("error preparing test: %v", err)
+				}
+				s.Builder.Sync()
+			},
+			CheckFn: func(t *testing.T, s *solverFixture, args ...interface{}) {
+				httpRoutes, err := s.Solver.httpRouteLister.List(labels.NewSelector())
+				if err != nil {
+					t.Errorf("error listing HTTPRoutes: %v", err)
+					t.Fail()
+					return
+				}
+
+				if len(httpRoutes) != 1 {
+					t.Errorf("Expected 1 HTTPRoute, but got: %v", len(httpRoutes))
+				}
+
+				gotHTTPRouteSpec := httpRoutes[0].Spec
+				expectedHTTPRoute := generateHTTPRouteSpec(s.Challenge, "fakeservice")
+				if !reflect.DeepEqual(gotHTTPRouteSpec, expectedHTTPRoute) {
+					t.Errorf("Expected HTTPRoute specs to match, but got diff:\n%v",
+						diff.ObjectDiff(gotHTTPRouteSpec, expectedHTTPRoute))
+				}
+			},
+		},
+	}
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			test.Setup(t)
+			resp, err := test.Solver.ensureGatewayHTTPRoute(context.TODO(), test.Challenge, "fakeservice")
+			if err != nil && !test.Err {
+				t.Errorf("Expected function to not error, but got: %v", err)
+			}
+			if err == nil && test.Err {
+				t.Errorf("Expected function to get an error, but got: %v", err)
+			}
+			test.Finish(t, resp, err)
+		})
+	}
+}