diff --git a/internal/locality/regional/schemas.go b/internal/locality/regional/schemas.go
index 29b5e196ad..2807245402 100644
--- a/internal/locality/regional/schemas.go
+++ b/internal/locality/regional/schemas.go
@@ -3,7 +3,7 @@ package regional
 import (
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/scaleway/scaleway-sdk-go/scw"
-	"github.com/scaleway/terraform-provider-scaleway/v2/internal/locality"
+	"github.com/scaleway/terraform-provider-scaleway/v2/internal/verify"
 )
 
 // ComputedSchema returns a standard schema for a region
@@ -32,6 +32,6 @@ func Schema() *schema.Schema {
 		Optional:         true,
 		ForceNew:         true,
 		Computed:         true,
-		ValidateDiagFunc: locality.ValidateStringInSliceWithWarning(allRegions(), "region"),
+		ValidateDiagFunc: verify.ValidateStringInSliceWithWarning(allRegions(), "region"),
 	}
 }
diff --git a/internal/locality/zonal/schemas.go b/internal/locality/zonal/schemas.go
index 279a981e18..4880258b45 100644
--- a/internal/locality/zonal/schemas.go
+++ b/internal/locality/zonal/schemas.go
@@ -3,7 +3,7 @@ package zonal
 import (
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/scaleway/scaleway-sdk-go/scw"
-	"github.com/scaleway/terraform-provider-scaleway/v2/internal/locality"
+	"github.com/scaleway/terraform-provider-scaleway/v2/internal/verify"
 )
 
 // ComputedSchema returns a standard schema for a zone
@@ -32,6 +32,6 @@ func Schema() *schema.Schema {
 		Optional:         true,
 		ForceNew:         true,
 		Computed:         true,
-		ValidateDiagFunc: locality.ValidateStringInSliceWithWarning(AllZones(), "zone"),
+		ValidateDiagFunc: verify.ValidateStringInSliceWithWarning(AllZones(), "zone"),
 	}
 }
diff --git a/internal/services/k8s/cluster.go b/internal/services/k8s/cluster.go
index 42a3bc830d..6e1d15a51c 100644
--- a/internal/services/k8s/cluster.go
+++ b/internal/services/k8s/cluster.go
@@ -64,11 +64,20 @@ func ResourceCluster() *schema.Resource {
 				Description: "The version of the cluster",
 			},
 			"cni": {
-				Type:             schema.TypeString,
-				Required:         true,
-				ForceNew:         true,
-				Description:      "The CNI plugin of the cluster",
-				ValidateDiagFunc: verify.ValidateEnum[k8s.CNI](),
+				Type:        schema.TypeString,
+				Required:    true,
+				ForceNew:    true,
+				Description: "The CNI plugin of the cluster",
+				ValidateDiagFunc: func(i any, p cty.Path) diag.Diagnostics {
+					var cniValues []k8s.CNI
+
+					cniStringValues := []string(nil)
+					for _, cniValue := range cniValues {
+						cniStringValues = append(cniStringValues, cniValue.String())
+					}
+
+					return verify.ValidateStringInSliceWithWarning(cniStringValues, "cni")(i, p)
+				},
 			},
 			"tags": {
 				Type: schema.TypeList,
diff --git a/internal/services/vpc/private_network.go b/internal/services/vpc/private_network.go
index 07777c5373..896384cebd 100644
--- a/internal/services/vpc/private_network.go
+++ b/internal/services/vpc/private_network.go
@@ -10,12 +10,12 @@ import (
 	"github.com/scaleway/scaleway-sdk-go/api/vpc/v2"
 	"github.com/scaleway/scaleway-sdk-go/scw"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/httperrors"
-	"github.com/scaleway/terraform-provider-scaleway/v2/internal/locality"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/locality/regional"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/locality/zonal"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/meta"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/services/account"
 	"github.com/scaleway/terraform-provider-scaleway/v2/internal/types"
+	"github.com/scaleway/terraform-provider-scaleway/v2/internal/verify"
 )
 
 func ResourcePrivateNetwork() *schema.Resource {
@@ -172,7 +172,7 @@ func ResourcePrivateNetwork() *schema.Resource {
 				Optional:         true,
 				Computed:         true,
 				Deprecated:       "This field is deprecated and will be removed in the next major version, please use `region` instead",
-				ValidateDiagFunc: locality.ValidateStringInSliceWithWarning(zonal.AllZones(), "zone"),
+				ValidateDiagFunc: verify.ValidateStringInSliceWithWarning(zonal.AllZones(), "zone"),
 			},
 			"region": regional.Schema(),
 			// Computed elements
diff --git a/internal/locality/validation.go b/internal/verify/validation.go
similarity index 97%
rename from internal/locality/validation.go
rename to internal/verify/validation.go
index dd763915b6..c99550b6ce 100644
--- a/internal/locality/validation.go
+++ b/internal/verify/validation.go
@@ -1,4 +1,4 @@
-package locality
+package verify
 
 import (
 	"github.com/hashicorp/go-cty/cty"