diff --git a/cmd/kubeadm/app/apis/kubeadm/fuzzer/fuzzer.go b/cmd/kubeadm/app/apis/kubeadm/fuzzer/fuzzer.go
index a06ad8f6a33..b488fda5f65 100644
--- a/cmd/kubeadm/app/apis/kubeadm/fuzzer/fuzzer.go
+++ b/cmd/kubeadm/app/apis/kubeadm/fuzzer/fuzzer.go
@@ -85,6 +85,10 @@ func fuzzClusterConfiguration(obj *kubeadm.ClusterConfiguration, c fuzz.Continue
 	obj.APIServer.TimeoutForControlPlane = &metav1.Duration{
 		Duration: constants.DefaultControlPlaneTimeout,
 	}
+	obj.ControllerManager.ExtraEnvs = []corev1.EnvVar{}
+	obj.APIServer.ExtraEnvs = []corev1.EnvVar{}
+	obj.Scheduler.ExtraEnvs = []corev1.EnvVar{}
+	obj.Etcd.Local.ExtraEnvs = []corev1.EnvVar{}
 }
 
 func fuzzDNS(obj *kubeadm.DNS, c fuzz.Continue) {