diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index 511ff418..3ebee72d 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -480,7 +480,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/api",
-			"Rev": "d5fda5562a2e"
+			"Rev": "532146f2aa2a"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery",
diff --git a/go.mod b/go.mod
index 4a206b99..203913e5 100644
--- a/go.mod
+++ b/go.mod
@@ -28,7 +28,7 @@ require (
 	golang.org/x/term v0.0.0-20210220032956-6a3ed077a48d
 	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba
 	google.golang.org/protobuf v1.25.0
-	k8s.io/api v0.0.0-20210519190848-d5fda5562a2e
+	k8s.io/api v0.0.0-20210520030843-532146f2aa2a
 	k8s.io/apimachinery v0.0.0-20210519190646-c7322e849168
 	k8s.io/klog/v2 v2.8.0
 	k8s.io/utils v0.0.0-20201110183641-67b214c5f920
@@ -37,6 +37,6 @@ require (
 )
 
 replace (
-	k8s.io/api => k8s.io/api v0.0.0-20210519190848-d5fda5562a2e
+	k8s.io/api => k8s.io/api v0.0.0-20210520030843-532146f2aa2a
 	k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20210519190646-c7322e849168
 )
diff --git a/go.sum b/go.sum
index 0ffa9a0a..e6556bc6 100644
--- a/go.sum
+++ b/go.sum
@@ -437,8 +437,8 @@ honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-k8s.io/api v0.0.0-20210519190848-d5fda5562a2e h1:NqV6nJIdQDUI6QvFuT+QDcc2s3kcWYUecGbTc74Y4GU=
-k8s.io/api v0.0.0-20210519190848-d5fda5562a2e/go.mod h1:pYZcnMa1kuzJ76ydALsvcwPMSsRcNNkhMonm1K/9Umo=
+k8s.io/api v0.0.0-20210520030843-532146f2aa2a h1:yk/O+aWhhXDM4xeO2KvPxpVp358XGaYIgSRmpxbDYak=
+k8s.io/api v0.0.0-20210520030843-532146f2aa2a/go.mod h1:pYZcnMa1kuzJ76ydALsvcwPMSsRcNNkhMonm1K/9Umo=
 k8s.io/apimachinery v0.0.0-20210519190646-c7322e849168 h1:mkBvQhy9WPz7t0Y3Muea1rVq2TRB91wvC8iE8xpbfl4=
 k8s.io/apimachinery v0.0.0-20210519190646-c7322e849168/go.mod h1:4rwBOLnlX0KG0S4eNjF9Aw8Y92JlZQe1fX+e7TeGWQE=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
diff --git a/testing/fake.go b/testing/fake.go
index 8b9ee149..3ab9c1b0 100644
--- a/testing/fake.go
+++ b/testing/fake.go
@@ -106,11 +106,15 @@ func (c *Fake) PrependReactor(verb, resource string, reaction ReactionFunc) {
 
 // AddWatchReactor appends a reactor to the end of the chain.
 func (c *Fake) AddWatchReactor(resource string, reaction WatchReactionFunc) {
+	c.Lock()
+	defer c.Unlock()
 	c.WatchReactionChain = append(c.WatchReactionChain, &SimpleWatchReactor{resource, reaction})
 }
 
 // PrependWatchReactor adds a reactor to the beginning of the chain.
 func (c *Fake) PrependWatchReactor(resource string, reaction WatchReactionFunc) {
+	c.Lock()
+	defer c.Unlock()
 	c.WatchReactionChain = append([]WatchReactor{&SimpleWatchReactor{resource, reaction}}, c.WatchReactionChain...)
 }