diff --git a/pkg/kube/fake/failing_kube_client.go b/pkg/kube/fake/failing_kube_client.go
index 0f7787f79..1289b35c6 100644
--- a/pkg/kube/fake/failing_kube_client.go
+++ b/pkg/kube/fake/failing_kube_client.go
@@ -19,6 +19,7 @@ package fake
 
 import (
 	"io"
+	"sync"
 	"time"
 
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -49,6 +50,7 @@ type FailingKubeClient struct {
 	WaitDuration           time.Duration
 	// RecordedWaitOptions stores the WaitOptions passed to GetWaiter for testing
 	RecordedWaitOptions []kube.WaitOption
+	mu                  sync.Mutex
 }
 
 var _ kube.Interface = &FailingKubeClient{}
@@ -160,7 +162,9 @@ func (f *FailingKubeClient) GetWaiter(ws kube.WaitStrategy) (kube.Waiter, error)
 
 func (f *FailingKubeClient) GetWaiterWithOptions(ws kube.WaitStrategy, opts ...kube.WaitOption) (kube.Waiter, error) {
 	// Record the WaitOptions for testing
+	f.mu.Lock()
 	f.RecordedWaitOptions = append(f.RecordedWaitOptions, opts...)
+	f.mu.Unlock()
 	waiter, _ := f.PrintingKubeClient.GetWaiterWithOptions(ws, opts...)
 	printingKubeWaiter, _ := waiter.(*PrintingKubeWaiter)
 	return &FailingKubeWaiter{