diff --git a/test/library/encryption/kms/provider.go b/test/library/encryption/kms/provider.go
new file mode 100644
index 0000000000..03753d004e
--- /dev/null
+++ b/test/library/encryption/kms/provider.go
@@ -0,0 +1,45 @@
+package kms
+
+import (
+	"testing"
+
+	configv1 "github.com/openshift/api/config/v1"
+)
+
+// KMSTestProvider pairs a KMS encryption config with its prerequisite setup.
+// This allows the same test cases to run against any KMS provider (Vault, AWS, etc.)
+// by simply iterating over a slice of providers.
+type KMSTestProvider struct {
+	Name             string
+	EncryptionConfig configv1.APIServerEncryption
+	// Setup is called before the test runs to ensure any prerequisites
+	// (secrets, credentials, infrastructure) are in place.
+	// Pass nil if no setup is needed.
+	Setup func(t testing.TB)
+}
+
+// DefaultVaultTestProvider is a ready-to-use Vault KMS provider for e2e tests.
+var DefaultVaultTestProvider = KMSTestProvider{
+	Name:             "Vault",
+	EncryptionConfig: DefaultVaultKMSEncryptionConfig,
+	Setup:            EnsureVaultAppRoleSecret,
+}
+
+// SetupAll runs the Setup function for each provider that has one.
+func SetupAll(t testing.TB, providers []KMSTestProvider) {
+	t.Helper()
+	for _, p := range providers {
+		if p.Setup != nil {
+			p.Setup(t)
+		}
+	}
+}
+
+// EncryptionConfigs extracts the APIServerEncryption configs from a slice of providers.
+func EncryptionConfigs(providers []KMSTestProvider) []configv1.APIServerEncryption {
+	configs := make([]configv1.APIServerEncryption, len(providers))
+	for i, p := range providers {
+		configs[i] = p.EncryptionConfig
+	}
+	return configs
+}
diff --git a/test/library/encryption/kms/vault.go b/test/library/encryption/kms/vault.go
index ff09697334..56c7272bc2 100644
--- a/test/library/encryption/kms/vault.go
+++ b/test/library/encryption/kms/vault.go
@@ -1,11 +1,54 @@
 package kms
 
 import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	corev1 "k8s.io/api/core/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
 	configv1 "github.com/openshift/api/config/v1"
+	library "github.com/openshift/library-go/test/library/encryption"
+)
+
+const (
+	DefaultVaultNamespace         = "vault-kms"
+	DefaultVaultCredentialsSecret = "vault-credentials"
+	DefaultVaultAppRoleSecretName = "vault-approle-secret"
+	DefaultVaultKMSPluginImage    = "quay.io/openshifttest/mock-kms-plugin@sha256:03bb07a2c08b509653c4c70217a06a4b389c10b4d87922f50ee5eac82db5e140"
+	DefaultVaultAddress           = "https://vault.vault-kms.svc:8200"
+	DefaultVaultEnterpriseNS      = "admin"
+	DefaultVaultTransitMount      = "transit"
+	DefaultVaultTransitKey        = "kms-key"
+	DefaultAppRoleTargetNamespace = "openshift-config"
 )
 
-// DefaultFakeKMSPluginConfig is a fake Vault KMS configuration used by tests.
-// The values are not real and are likely to change as the KMS integration evolves.
+// DefaultVaultKMSEncryptionConfig is the standard Vault KMS encryption config
+// used by CI e2e tests. Consumers can use this directly or copy/modify as needed.
+var DefaultVaultKMSEncryptionConfig = configv1.APIServerEncryption{
+	Type: configv1.EncryptionTypeKMS,
+	KMS: configv1.KMSPluginConfig{
+		Type: configv1.VaultKMSProvider,
+		Vault: configv1.VaultKMSPluginConfig{
+			KMSPluginImage: DefaultVaultKMSPluginImage,
+			VaultAddress:   DefaultVaultAddress,
+			VaultNamespace: DefaultVaultEnterpriseNS,
+			TransitMount:   DefaultVaultTransitMount,
+			TransitKey:     DefaultVaultTransitKey,
+			Authentication: configv1.VaultAuthentication{
+				Type: configv1.VaultAuthenticationTypeAppRole,
+				AppRole: configv1.VaultAppRoleAuthentication{
+					Secret: configv1.VaultSecretReference{Name: DefaultVaultAppRoleSecretName},
+				},
+			},
+		},
+	},
+}
+
+// DefaultFakeKMSPluginConfig is a fake Vault KMS configuration used by unit tests.
 var DefaultFakeKMSPluginConfig = configv1.KMSPluginConfig{
 	Type: configv1.VaultKMSProvider,
 	Vault: configv1.VaultKMSPluginConfig{
@@ -20,3 +63,40 @@ var DefaultFakeKMSPluginConfig = configv1.KMSPluginConfig{
 		TransitKey: "test-transit-key",
 	},
 }
+
+// EnsureVaultAppRoleSecret reads credentials from the vault-credentials secret
+// (created by a CI step) and creates/updates the AppRole secret in openshift-config.
+func EnsureVaultAppRoleSecret(t testing.TB) {
+	t.Helper()
+	ctx := context.Background()
+	cs := library.GetClients(t)
+
+	creds, err := cs.Kube.CoreV1().Secrets(DefaultVaultNamespace).Get(ctx, DefaultVaultCredentialsSecret, metav1.GetOptions{})
+	require.NoError(t, err, "failed to read %s/%s secret (was the vault-install CI step run?)", DefaultVaultNamespace, DefaultVaultCredentialsSecret)
+
+	roleID, ok := creds.Data["role-id"]
+	require.Truef(t, ok && len(roleID) > 0, "missing or empty key %q in %s/%s", "role-id", DefaultVaultNamespace, DefaultVaultCredentialsSecret)
+	secretID, ok := creds.Data["secret-id"]
+	require.Truef(t, ok && len(secretID) > 0, "missing or empty key %q in %s/%s", "secret-id", DefaultVaultNamespace, DefaultVaultCredentialsSecret)
+
+	appRoleSecret := &corev1.Secret{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      DefaultVaultAppRoleSecretName,
+			Namespace: DefaultAppRoleTargetNamespace,
+		},
+		Type: corev1.SecretTypeOpaque,
+		Data: map[string][]byte{
+			"roleID":   roleID,
+			"secretID": secretID,
+		},
+	}
+	_, err = cs.Kube.CoreV1().Secrets(DefaultAppRoleTargetNamespace).Create(ctx, appRoleSecret, metav1.CreateOptions{})
+	if apierrors.IsAlreadyExists(err) {
+		existing, getErr := cs.Kube.CoreV1().Secrets(DefaultAppRoleTargetNamespace).Get(ctx, DefaultVaultAppRoleSecretName, metav1.GetOptions{})
+		require.NoError(t, getErr, "failed to get existing AppRole secret for update")
+		appRoleSecret.ResourceVersion = existing.ResourceVersion
+		_, err = cs.Kube.CoreV1().Secrets(DefaultAppRoleTargetNamespace).Update(ctx, appRoleSecret, metav1.UpdateOptions{})
+	}
+	require.NoError(t, err, "failed to create/update AppRole secret")
+	t.Logf("Created/updated AppRole secret %s in %s", DefaultVaultAppRoleSecretName, DefaultAppRoleTargetNamespace)
+}