diff --git a/cmd/kubeadm/app/cmd/phases/init/data.go b/cmd/kubeadm/app/cmd/phases/init/data.go
index 6e7b8ba3a6b..e88b7499ea2 100644
--- a/cmd/kubeadm/app/cmd/phases/init/data.go
+++ b/cmd/kubeadm/app/cmd/phases/init/data.go
@@ -51,3 +51,31 @@ type InitData interface {
 	Tokens() []string
 	PatchesDir() string
 }
+
+// a package local type for testing purposes.
+type testInitData struct{}
+
+// testInitData must satisfy InitData.
+var _ InitData = &testInitData{}
+
+func (t *testInitData) UploadCerts() bool                                    { return false }
+func (t *testInitData) CertificateKey() string                               { return "" }
+func (t *testInitData) SetCertificateKey(key string)                         {}
+func (t *testInitData) SkipCertificateKeyPrint() bool                        { return false }
+func (t *testInitData) Cfg() *kubeadmapi.InitConfiguration                   { return nil }
+func (t *testInitData) DryRun() bool                                         { return false }
+func (t *testInitData) SkipTokenPrint() bool                                 { return false }
+func (t *testInitData) IgnorePreflightErrors() sets.Set[string]              { return nil }
+func (t *testInitData) CertificateWriteDir() string                          { return "" }
+func (t *testInitData) CertificateDir() string                               { return "" }
+func (t *testInitData) KubeConfig() (*clientcmdapi.Config, error)            { return nil, nil }
+func (t *testInitData) KubeConfigDir() string                                { return "" }
+func (t *testInitData) KubeConfigPath() string                               { return "" }
+func (t *testInitData) ManifestDir() string                                  { return "" }
+func (t *testInitData) KubeletDir() string                                   { return "" }
+func (t *testInitData) ExternalCA() bool                                     { return false }
+func (t *testInitData) OutputWriter() io.Writer                              { return nil }
+func (t *testInitData) Client() (clientset.Interface, error)                 { return nil, nil }
+func (t *testInitData) WaitControlPlaneClient() (clientset.Interface, error) { return nil, nil }
+func (t *testInitData) Tokens() []string                                     { return nil }
+func (t *testInitData) PatchesDir() string                                   { return "" }
diff --git a/cmd/kubeadm/app/cmd/phases/init/data_test.go b/cmd/kubeadm/app/cmd/phases/init/data_test.go
deleted file mode 100644
index 8465021446a..00000000000
--- a/cmd/kubeadm/app/cmd/phases/init/data_test.go
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
-Copyright 2019 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package phases
-
-import (
-	"io"
-
-	"k8s.io/apimachinery/pkg/util/sets"
-	clientset "k8s.io/client-go/kubernetes"
-	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
-
-	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
-)
-
-// a package local type for testing purposes.
-type testInitData struct{}
-
-// testInitData must satisfy InitData.
-var _ InitData = &testInitData{}
-
-func (t *testInitData) UploadCerts() bool                                    { return false }
-func (t *testInitData) CertificateKey() string                               { return "" }
-func (t *testInitData) SetCertificateKey(key string)                         {}
-func (t *testInitData) SkipCertificateKeyPrint() bool                        { return false }
-func (t *testInitData) Cfg() *kubeadmapi.InitConfiguration                   { return nil }
-func (t *testInitData) DryRun() bool                                         { return false }
-func (t *testInitData) SkipTokenPrint() bool                                 { return false }
-func (t *testInitData) IgnorePreflightErrors() sets.Set[string]              { return nil }
-func (t *testInitData) CertificateWriteDir() string                          { return "" }
-func (t *testInitData) CertificateDir() string                               { return "" }
-func (t *testInitData) KubeConfig() (*clientcmdapi.Config, error)            { return nil, nil }
-func (t *testInitData) KubeConfigDir() string                                { return "" }
-func (t *testInitData) KubeConfigPath() string                               { return "" }
-func (t *testInitData) ManifestDir() string                                  { return "" }
-func (t *testInitData) KubeletDir() string                                   { return "" }
-func (t *testInitData) ExternalCA() bool                                     { return false }
-func (t *testInitData) OutputWriter() io.Writer                              { return nil }
-func (t *testInitData) Client() (clientset.Interface, error)                 { return nil, nil }
-func (t *testInitData) WaitControlPlaneClient() (clientset.Interface, error) { return nil, nil }
-func (t *testInitData) Tokens() []string                                     { return nil }
-func (t *testInitData) PatchesDir() string                                   { return "" }
diff --git a/cmd/kubeadm/app/cmd/phases/join/data.go b/cmd/kubeadm/app/cmd/phases/join/data.go
index 9e04d9032f9..197d018b75d 100644
--- a/cmd/kubeadm/app/cmd/phases/join/data.go
+++ b/cmd/kubeadm/app/cmd/phases/join/data.go
@@ -45,3 +45,24 @@ type JoinData interface {
 	ManifestDir() string
 	CertificateWriteDir() string
 }
+
+// a package local type for testing purposes.
+type testJoinData struct{}
+
+// testJoinData must satisfy JoinData.
+var _ JoinData = &testJoinData{}
+
+func (j *testJoinData) CertificateKey() string                               { return "" }
+func (j *testJoinData) Cfg() *kubeadmapi.JoinConfiguration                   { return nil }
+func (j *testJoinData) TLSBootstrapCfg() (*clientcmdapi.Config, error)       { return nil, nil }
+func (j *testJoinData) InitCfg() (*kubeadmapi.InitConfiguration, error)      { return nil, nil }
+func (j *testJoinData) Client() (clientset.Interface, error)                 { return nil, nil }
+func (j *testJoinData) WaitControlPlaneClient() (clientset.Interface, error) { return nil, nil }
+func (j *testJoinData) IgnorePreflightErrors() sets.Set[string]              { return nil }
+func (j *testJoinData) OutputWriter() io.Writer                              { return nil }
+func (j *testJoinData) PatchesDir() string                                   { return "" }
+func (j *testJoinData) DryRun() bool                                         { return false }
+func (j *testJoinData) KubeConfigDir() string                                { return "" }
+func (j *testJoinData) KubeletDir() string                                   { return "" }
+func (j *testJoinData) ManifestDir() string                                  { return "" }
+func (j *testJoinData) CertificateWriteDir() string                          { return "" }
diff --git a/cmd/kubeadm/app/cmd/phases/join/data_test.go b/cmd/kubeadm/app/cmd/phases/join/data_test.go
deleted file mode 100644
index 5995acf7d73..00000000000
--- a/cmd/kubeadm/app/cmd/phases/join/data_test.go
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
-Copyright 2019 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package phases
-
-import (
-	"io"
-
-	"k8s.io/apimachinery/pkg/util/sets"
-	clientset "k8s.io/client-go/kubernetes"
-	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
-
-	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
-)
-
-// a package local type for testing purposes.
-type testJoinData struct{}
-
-// testJoinData must satisfy JoinData.
-var _ JoinData = &testJoinData{}
-
-func (j *testJoinData) CertificateKey() string                               { return "" }
-func (j *testJoinData) Cfg() *kubeadmapi.JoinConfiguration                   { return nil }
-func (j *testJoinData) TLSBootstrapCfg() (*clientcmdapi.Config, error)       { return nil, nil }
-func (j *testJoinData) InitCfg() (*kubeadmapi.InitConfiguration, error)      { return nil, nil }
-func (j *testJoinData) Client() (clientset.Interface, error)                 { return nil, nil }
-func (j *testJoinData) WaitControlPlaneClient() (clientset.Interface, error) { return nil, nil }
-func (j *testJoinData) IgnorePreflightErrors() sets.Set[string]              { return nil }
-func (j *testJoinData) OutputWriter() io.Writer                              { return nil }
-func (j *testJoinData) PatchesDir() string                                   { return "" }
-func (j *testJoinData) DryRun() bool                                         { return false }
-func (j *testJoinData) KubeConfigDir() string                                { return "" }
-func (j *testJoinData) KubeletDir() string                                   { return "" }
-func (j *testJoinData) ManifestDir() string                                  { return "" }
-func (j *testJoinData) CertificateWriteDir() string                          { return "" }
diff --git a/cmd/kubeadm/app/cmd/phases/reset/data.go b/cmd/kubeadm/app/cmd/phases/reset/data.go
index 260a899ba4a..97bc15bb31a 100644
--- a/cmd/kubeadm/app/cmd/phases/reset/data.go
+++ b/cmd/kubeadm/app/cmd/phases/reset/data.go
@@ -39,3 +39,20 @@ type resetData interface {
 	CRISocketPath() string
 	CleanupTmpDir() bool
 }
+
+// a package local type for testing purposes.
+type testData struct{}
+
+// testData must satisfy resetData.
+var _ resetData = &testData{}
+
+func (t *testData) ForceReset() bool                         { return false }
+func (t *testData) InputReader() io.Reader                   { return nil }
+func (t *testData) IgnorePreflightErrors() sets.Set[string]  { return nil }
+func (t *testData) Cfg() *kubeadmapi.InitConfiguration       { return nil }
+func (t *testData) DryRun() bool                             { return false }
+func (t *testData) Client() clientset.Interface              { return nil }
+func (t *testData) CertificatesDir() string                  { return "" }
+func (t *testData) CRISocketPath() string                    { return "" }
+func (t *testData) CleanupTmpDir() bool                      { return false }
+func (t *testData) ResetCfg() *kubeadmapi.ResetConfiguration { return nil }
diff --git a/cmd/kubeadm/app/cmd/phases/reset/data_test.go b/cmd/kubeadm/app/cmd/phases/reset/data_test.go
deleted file mode 100644
index 470af261138..00000000000
--- a/cmd/kubeadm/app/cmd/phases/reset/data_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
-Copyright 2022 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package phases
-
-import (
-	"io"
-
-	"k8s.io/apimachinery/pkg/util/sets"
-	clientset "k8s.io/client-go/kubernetes"
-
-	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
-)
-
-// a package local type for testing purposes.
-type testData struct{}
-
-// testData must satisfy resetData.
-var _ resetData = &testData{}
-
-func (t *testData) ForceReset() bool                         { return false }
-func (t *testData) InputReader() io.Reader                   { return nil }
-func (t *testData) IgnorePreflightErrors() sets.Set[string]  { return nil }
-func (t *testData) Cfg() *kubeadmapi.InitConfiguration       { return nil }
-func (t *testData) DryRun() bool                             { return false }
-func (t *testData) Client() clientset.Interface              { return nil }
-func (t *testData) CertificatesDir() string                  { return "" }
-func (t *testData) CRISocketPath() string                    { return "" }
-func (t *testData) CleanupTmpDir() bool                      { return false }
-func (t *testData) ResetCfg() *kubeadmapi.ResetConfiguration { return nil }
diff --git a/cmd/kubeadm/app/cmd/phases/upgrade/data.go b/cmd/kubeadm/app/cmd/phases/upgrade/data.go
index 016199c90f6..3c06df2fb4e 100644
--- a/cmd/kubeadm/app/cmd/phases/upgrade/data.go
+++ b/cmd/kubeadm/app/cmd/phases/upgrade/data.go
@@ -41,3 +41,22 @@ type Data interface {
 	KubeConfigDir() string
 	KubeletDir() string
 }
+
+// a package local type for testing purposes.
+type testData struct{}
+
+// testData must satisfy Data.
+var _ Data = &testData{}
+
+func (t *testData) EtcdUpgrade() bool                       { return false }
+func (t *testData) RenewCerts() bool                        { return false }
+func (t *testData) DryRun() bool                            { return false }
+func (t *testData) Cfg() *kubeadmapi.UpgradeConfiguration   { return nil }
+func (t *testData) InitCfg() *kubeadmapi.InitConfiguration  { return nil }
+func (t *testData) IsControlPlaneNode() bool                { return false }
+func (t *testData) Client() clientset.Interface             { return nil }
+func (t *testData) IgnorePreflightErrors() sets.Set[string] { return nil }
+func (t *testData) PatchesDir() string                      { return "" }
+func (t *testData) OutputWriter() io.Writer                 { return nil }
+func (t *testData) KubeConfigDir() string                   { return "" }
+func (t *testData) KubeletDir() string                      { return "" }
diff --git a/cmd/kubeadm/app/cmd/phases/upgrade/data_test.go b/cmd/kubeadm/app/cmd/phases/upgrade/data_test.go
deleted file mode 100644
index 1684b206794..00000000000
--- a/cmd/kubeadm/app/cmd/phases/upgrade/data_test.go
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
-Copyright 2024 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package upgrade
-
-import (
-	"io"
-
-	"k8s.io/apimachinery/pkg/util/sets"
-	clientset "k8s.io/client-go/kubernetes"
-
-	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
-)
-
-// a package local type for testing purposes.
-type testData struct{}
-
-// testData must satisfy Data.
-var _ Data = &testData{}
-
-func (t *testData) EtcdUpgrade() bool                       { return false }
-func (t *testData) RenewCerts() bool                        { return false }
-func (t *testData) DryRun() bool                            { return false }
-func (t *testData) Cfg() *kubeadmapi.UpgradeConfiguration   { return nil }
-func (t *testData) InitCfg() *kubeadmapi.InitConfiguration  { return nil }
-func (t *testData) IsControlPlaneNode() bool                { return false }
-func (t *testData) Client() clientset.Interface             { return nil }
-func (t *testData) IgnorePreflightErrors() sets.Set[string] { return nil }
-func (t *testData) PatchesDir() string                      { return "" }
-func (t *testData) OutputWriter() io.Writer                 { return nil }
-func (t *testData) KubeConfigDir() string                   { return "" }
-func (t *testData) KubeletDir() string                      { return "" }