diff --git a/go.sum b/go.sum
index 625ff033e..271420f85 100644
--- a/go.sum
+++ b/go.sum
@@ -530,6 +530,7 @@ github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v0.0.0-20151028094244-d8ed2627bdf0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pquerna/cachecontrol v0.0.0-20171018203845-0dec1b30a021/go.mod h1:prYjPmNq4d1NPVmpShWobRqXY3q7Vp+80DqgxxUrUIA=
 github.com/pquerna/ffjson v0.0.0-20180717144149-af8b230fcd20/go.mod h1:YARuvh7BUWHNhzDq2OM5tzR2RiCcN2D7sapiKyCel/M=
@@ -617,6 +618,7 @@ github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoH
 github.com/stretchr/testify v0.0.0-20151208002404-e3a8ff8ce365/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/syndtr/gocapability v0.0.0-20160928074757-e7cb7fa329f4/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/thecodeteam/goscaleio v0.1.0/go.mod h1:68sdkZAsK8bvEwBlbQnlLS+xU+hvLYM/iQ8KXej1AwM=
diff --git a/pkg/controller/humiocluster/humiocluster_controller_test.go b/pkg/controller/humiocluster/humiocluster_controller_test.go
new file mode 100644
index 000000000..d834bc395
--- /dev/null
+++ b/pkg/controller/humiocluster/humiocluster_controller_test.go
@@ -0,0 +1,86 @@
+package humiocluster
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	humioClusterv1alpha1 "github.com/humio/humio-operator/pkg/apis/core/v1alpha1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+	logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
+
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/kubernetes/scheme"
+	"sigs.k8s.io/controller-runtime/pkg/client/fake"
+)
+
+var (
+	humioCluster1 = &humioClusterv1alpha1.HumioCluster{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "humiocluster",
+			Namespace: "logging",
+		},
+		Spec: humioClusterv1alpha1.HumioClusterSpec{
+			Image:                   "humio/humio-core",
+			Version:                 "1.9.0",
+			TargetReplicationFactor: 1,
+		},
+	}
+)
+
+func TestReconcileHumioCluster_Reconcile(t *testing.T) {
+	// Set the logger to development mode for verbose logs.
+	logf.SetLogger(logf.ZapLogger(true))
+
+	// Objects to track in the fake client.
+	objs := []runtime.Object{
+		humioCluster1,
+	}
+
+	// Register operator types with the runtime scheme.
+	s := scheme.Scheme
+	s.AddKnownTypes(humioClusterv1alpha1.SchemeGroupVersion, humioCluster1)
+
+	// Create a fake client to mock API calls.
+	cl := fake.NewFakeClient(objs...)
+	// Create a ReconcileHumioCluster object with the scheme and fake client.
+	r := &ReconcileHumioCluster{client: cl, scheme: s}
+
+	// Mock request to simulate Reconcile() being called on an event for a
+	// watched resource .
+	req := reconcile.Request{
+		NamespacedName: types.NamespacedName{
+			Name:      humioCluster1.ObjectMeta.Name,
+			Namespace: humioCluster1.ObjectMeta.Namespace,
+		},
+	}
+	res, err := r.Reconcile(req)
+	if err != nil {
+		t.Fatalf("reconcile: (%v)", err)
+	}
+
+	pod := &corev1.Pod{}
+	err = cl.Get(context.TODO(), types.NamespacedName{Name: fmt.Sprintf("%s-pod", humioCluster1.ObjectMeta.Name), Namespace: humioCluster1.ObjectMeta.Namespace}, pod)
+	if err != nil {
+		t.Fatalf("get pod: (%v). %+v", err, pod)
+	}
+
+	// Reconcile again so Reconcile() checks pods and updates the HumioCluster resources' Status.
+	res, err = r.Reconcile(req)
+	if err != nil {
+		t.Fatalf("reconcile: (%v)", err)
+	}
+	if res != (reconcile.Result{}) {
+		t.Error("reconcile did not return an empty Result")
+	}
+
+	// Get the updated HumioCluster object.
+	humioCluster := &humioClusterv1alpha1.HumioCluster{}
+	err = r.client.Get(context.TODO(), req.NamespacedName, humioCluster)
+	if err != nil {
+		t.Errorf("get HumioCluster: (%v)", err)
+	}
+}