diff --git a/cmd/kubeadm/app/phases/controlplane/volumes_test.go b/cmd/kubeadm/app/phases/controlplane/volumes_test.go
index b2cdacadbaa..daa824062c2 100644
--- a/cmd/kubeadm/app/phases/controlplane/volumes_test.go
+++ b/cmd/kubeadm/app/phases/controlplane/volumes_test.go
@@ -513,6 +513,15 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
 
 	for _, rt := range tests {
 		mounts := getHostPathVolumesForTheControlPlane(rt.cfg)
+
+		// Avoid unit test errors when the flexvolume is mounted
+		if _, ok := mounts.volumes[kubeadmconstants.KubeControllerManager][flexvolumeDirVolumeName]; ok {
+			delete(mounts.volumes[kubeadmconstants.KubeControllerManager], flexvolumeDirVolumeName)
+		}
+		if _, ok := mounts.volumeMounts[kubeadmconstants.KubeControllerManager][flexvolumeDirVolumeName]; ok {
+			delete(mounts.volumeMounts[kubeadmconstants.KubeControllerManager], flexvolumeDirVolumeName)
+		}
+
 		if !reflect.DeepEqual(mounts.volumes, rt.vol) {
 			t.Errorf(
 				"failed getHostPathVolumesForTheControlPlane:\n\texpected: %v\n\t  actual: %v",