diff --git a/pkg/kuadranttools/limitador_tools.go b/pkg/kuadranttools/limitador_tools.go
index 0ab62db9a..bbe5ad12d 100644
--- a/pkg/kuadranttools/limitador_tools.go
+++ b/pkg/kuadranttools/limitador_tools.go
@@ -12,11 +12,11 @@ func LimitadorMutator(existingObj, desiredObj client.Object) (bool, error) {
 	update := false
 	existing, ok := existingObj.(*limitadorv1alpha1.Limitador)
 	if !ok {
-		return false, fmt.Errorf("%T is not a *limitadorv1alpha1.Limitador", existingObj)
+		return false, fmt.Errorf("existingObj %T is not a *limitadorv1alpha1.Limitador", existingObj)
 	}
 	desired, ok := desiredObj.(*limitadorv1alpha1.Limitador)
 	if !ok {
-		return false, fmt.Errorf("%T is not a *limitadorv1alpha1.Limitador", existingObj)
+		return false, fmt.Errorf("desireObj %T is not a *limitadorv1alpha1.Limitador", desiredObj)
 	}
 
 	existingSpec := limitadorSpecSubSet(existing.Spec)
diff --git a/pkg/kuadranttools/limitador_tools_test.go b/pkg/kuadranttools/limitador_tools_test.go
new file mode 100644
index 000000000..bb2f94492
--- /dev/null
+++ b/pkg/kuadranttools/limitador_tools_test.go
@@ -0,0 +1,198 @@
+//go:build unit
+
+package kuadranttools
+
+import (
+	"github.com/kuadrant/kuadrant-operator/api/v1beta1"
+	limitadorv1alpha1 "github.com/kuadrant/limitador-operator/api/v1alpha1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
+	"reflect"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"strings"
+	"testing"
+)
+
+func TestLimitadorMutator(t *testing.T) {
+	replicas := 3
+	replicasB := 1
+	type args struct {
+		existingObj client.Object
+		desiredObj  client.Object
+	}
+	tests := []struct {
+		name          string
+		args          args
+		want          bool
+		wantErr       bool
+		errorContains string
+	}{
+		{
+			name:          "existingObj is not a limitador type",
+			wantErr:       true,
+			errorContains: "existingObj",
+		},
+		{
+			name: "desiredObj is not a limitador type",
+			args: args{
+				existingObj: &limitadorv1alpha1.Limitador{},
+			},
+			wantErr:       true,
+			errorContains: "desireObj",
+		},
+		{
+			name: "No update required",
+			args: args{
+				existingObj: &limitadorv1alpha1.Limitador{},
+				desiredObj:  &limitadorv1alpha1.Limitador{},
+			},
+			want: false,
+		},
+		{
+			name: "Update required",
+			args: args{
+				existingObj: &limitadorv1alpha1.Limitador{
+					Spec: limitadorv1alpha1.LimitadorSpec{
+						Replicas: &replicas,
+					},
+				},
+				desiredObj: &limitadorv1alpha1.Limitador{
+					Spec: limitadorv1alpha1.LimitadorSpec{
+						Replicas: &replicasB,
+					},
+				},
+			},
+			want: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := LimitadorMutator(tt.args.existingObj, tt.args.desiredObj)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("LimitadorMutator() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+
+			if err != nil && tt.wantErr {
+				if !strings.Contains(err.Error(), tt.errorContains) {
+					t.Errorf("LimitadorMutator() error = %v, should contain %v", err, tt.errorContains)
+				}
+			}
+			if got != tt.want {
+				t.Errorf("LimitadorMutator() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_limitadorSpecSubSet(t *testing.T) {
+	replicas := 3
+	type args struct {
+		spec limitadorv1alpha1.LimitadorSpec
+	}
+	tests := []struct {
+		name string
+		args args
+		want v1beta1.LimitadorSpec
+	}{
+		{
+			name: "Empty spec passed",
+			args: args{spec: limitadorv1alpha1.LimitadorSpec{}},
+			want: v1beta1.LimitadorSpec{},
+		},
+		{
+			name: "Full spec passed",
+			args: args{spec: limitadorv1alpha1.LimitadorSpec{
+				Affinity: &corev1.Affinity{
+					PodAffinity: &corev1.PodAffinity{
+						PreferredDuringSchedulingIgnoredDuringExecution: []corev1.WeightedPodAffinityTerm{
+							{
+								Weight: 100,
+								PodAffinityTerm: corev1.PodAffinityTerm{LabelSelector: &metav1.LabelSelector{
+									MatchLabels: map[string]string{
+										"app": "limitador",
+									},
+								}},
+							},
+						},
+					},
+				},
+				Replicas: &replicas,
+				Storage: &limitadorv1alpha1.Storage{
+					Redis: &limitadorv1alpha1.Redis{
+						ConfigSecretRef: &corev1.LocalObjectReference{
+							Name: "secret_config",
+						},
+					},
+				},
+				PodDisruptionBudget: &limitadorv1alpha1.PodDisruptionBudgetType{
+					MinAvailable: &intstr.IntOrString{
+						IntVal: 1,
+					},
+				},
+				ResourceRequirements: &corev1.ResourceRequirements{
+					Limits:   corev1.ResourceList{},
+					Requests: corev1.ResourceList{},
+				},
+			}},
+			want: v1beta1.LimitadorSpec{
+				Affinity: &corev1.Affinity{
+					PodAffinity: &corev1.PodAffinity{
+						PreferredDuringSchedulingIgnoredDuringExecution: []corev1.WeightedPodAffinityTerm{
+							{
+								Weight: 100,
+								PodAffinityTerm: corev1.PodAffinityTerm{LabelSelector: &metav1.LabelSelector{
+									MatchLabels: map[string]string{
+										"app": "limitador",
+									},
+								}},
+							},
+						},
+					},
+				},
+				Replicas: &replicas,
+				Storage: &limitadorv1alpha1.Storage{
+					Redis: &limitadorv1alpha1.Redis{
+						ConfigSecretRef: &corev1.LocalObjectReference{
+							Name: "secret_config",
+						},
+					},
+				},
+				PodDisruptionBudget: &limitadorv1alpha1.PodDisruptionBudgetType{
+					MinAvailable: &intstr.IntOrString{
+						IntVal: 1,
+					},
+				},
+				ResourceRequirements: &corev1.ResourceRequirements{
+					Limits:   corev1.ResourceList{},
+					Requests: corev1.ResourceList{},
+				},
+			},
+		},
+		{
+			name: "Partial spec passed",
+			args: args{spec: limitadorv1alpha1.LimitadorSpec{
+				Replicas: &replicas,
+				ResourceRequirements: &corev1.ResourceRequirements{
+					Limits:   corev1.ResourceList{},
+					Requests: corev1.ResourceList{},
+				},
+			}},
+			want: v1beta1.LimitadorSpec{
+				Replicas: &replicas,
+				ResourceRequirements: &corev1.ResourceRequirements{
+					Limits:   corev1.ResourceList{},
+					Requests: corev1.ResourceList{},
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := limitadorSpecSubSet(tt.args.spec); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("limitadorSpecSubSet() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}