Repository: notaryproject/notation (go)

Issue:
Update the default behavior to use the OCI-1.1 specification when storing signatures.
The idea is to  make `--force-referrers-tag=false` as default behavior.

Pull request description:
feat: OCI 1.1 support
In this PR:

- removes the deprecated experimental flag `--allow-referrers-api`
- updates the default value of flag `--force-referrers-tag` to `false` in `sign` command.

Resolves #1040 

Patch:
diff --git a/cmd/notation/inspect.go b/cmd/notation/inspect.go
index 673d156..3727970 100644
--- a/cmd/notation/inspect.go
+++ b/cmd/notation/inspect.go
@@ -21,7 +21,6 @@ import (
 	"github.com/notaryproject/notation-core-go/signature"
 	"github.com/notaryproject/notation/cmd/notation/internal/display"
 	cmderr "github.com/notaryproject/notation/cmd/notation/internal/errors"
-	"github.com/notaryproject/notation/cmd/notation/internal/experimental"
 	"github.com/notaryproject/notation/cmd/notation/internal/option"
 	"github.com/notaryproject/notation/internal/cmd"
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
@@ -33,9 +32,8 @@ type inspectOpts struct {
 	SecureFlagOpts
 	option.Common
 	option.Format
-	reference         string
-	allowReferrersAPI bool
-	maxSignatures     int
+	reference     string
+	maxSignatures int
 }
 
 func inspectCommand(opts *inspectOpts) *cobra.Command {
@@ -69,23 +67,18 @@ Example - Inspect signatures on an OCI artifact identified by a digest and outpu
 				return err
 			}
 			opts.Common.Parse(cmd)
-			return experimental.CheckFlagsAndWarn(cmd, "allow-referrers-api")
+			return nil
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if opts.maxSignatures <= 0 {
 				return fmt.Errorf("max-signatures value %d must be a positive number", opts.maxSignatures)
 			}
-			if cmd.Flags().Changed("allow-referrers-api") {
-				fmt.Fprintln(os.Stderr, "Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.")
-			}
 			return runInspect(cmd, opts)
 		},
 	}
-
 	opts.LoggingFlagOpts.ApplyFlags(command.Flags())
 	opts.SecureFlagOpts.ApplyFlags(command.Flags())
 	command.Flags().IntVar(&opts.maxSignatures, "max-signatures", 100, "maximum number of signatures to evaluate or examine")
-	cmd.SetPflagReferrersAPI(command.Flags(), &opts.allowReferrersAPI, fmt.Sprintf(cmd.PflagReferrersUsageFormat, "inspect"))
 
 	// set output format
 	opts.Format.ApplyFlags(command.Flags(), option.FormatTypeTree, option.FormatTypeJSON)
diff --git a/cmd/notation/list.go b/cmd/notation/list.go
index 3871349..1b9c1c4 100644
--- a/cmd/notation/list.go
+++ b/cmd/notation/list.go
@@ -17,7 +17,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"os"
 
 	notationregistry "github.com/notaryproject/notation-go/registry"
 	cmderr "github.com/notaryproject/notation/cmd/notation/internal/errors"
@@ -31,11 +30,10 @@ import (
 type listOpts struct {
 	cmd.LoggingFlagOpts
 	SecureFlagOpts
-	reference         string
-	allowReferrersAPI bool
-	ociLayout         bool
-	inputType         inputType
-	maxSignatures     int
+	reference     string
+	ociLayout     bool
+	inputType     inputType
+	maxSignatures int
 }
 
 func listCommand(opts *listOpts) *cobra.Command {
@@ -75,21 +73,17 @@ Example - [Experimental] List signatures of an OCI artifact identified by a tag
 			if opts.ociLayout {
 				opts.inputType = inputTypeOCILayout
 			}
-			return experimental.CheckFlagsAndWarn(cmd, "allow-referrers-api", "oci-layout")
+			return experimental.CheckFlagsAndWarn(cmd, "oci-layout")
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if opts.maxSignatures <= 0 {
 				return fmt.Errorf("max-signatures value %d must be a positive number", opts.maxSignatures)
 			}
-			if cmd.Flags().Changed("allow-referrers-api") {
-				fmt.Fprintln(os.Stderr, "Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.")
-			}
 			return runList(cmd.Context(), opts)
 		},
 	}
 	opts.LoggingFlagOpts.ApplyFlags(command.Flags())
 	opts.SecureFlagOpts.ApplyFlags(command.Flags())
-	cmd.SetPflagReferrersAPI(command.Flags(), &opts.allowReferrersAPI, fmt.Sprintf(cmd.PflagReferrersUsageFormat, "list"))
 	command.Flags().BoolVar(&opts.ociLayout, "oci-layout", false, "[Experimental] list signatures stored in OCI image layout")
 	command.Flags().IntVar(&opts.maxSignatures, "max-signatures", 100, "maximum number of signatures to evaluate or examine")
 	experimental.HideFlags(command, experimentalExamples, []string{"oci-layout"})
diff --git a/cmd/notation/registry.go b/cmd/notation/registry.go
index bc93521..3be53c5 100644
--- a/cmd/notation/registry.go
+++ b/cmd/notation/registry.go
@@ -83,12 +83,10 @@ func getRemoteRepository(ctx context.Context, opts *SecureFlagOpts, reference st
 	}
 
 	if forceReferrersTag {
-		logger.Info("The referrers tag schema is always attempted")
+		logger.Info("Force to store signatures using the referrers tag schema")
 		if err := remoteRepo.SetReferrersCapability(false); err != nil {
 			return nil, err
 		}
-	} else {
-		logger.Info("Allowed to access the referrers API, fallback if not supported")
 	}
 	return notationregistry.NewRepository(remoteRepo), nil
 }
diff --git a/cmd/notation/sign.go b/cmd/notation/sign.go
index 215b759..e85da5d 100644
--- a/cmd/notation/sign.go
+++ b/cmd/notation/sign.go
@@ -51,7 +51,6 @@ type signOpts struct {
 	pluginConfig           []string
 	userMetadata           []string
 	reference              string
-	allowReferrersAPI      bool
 	forceReferrersTag      bool
 	ociLayout              bool
 	inputType              inputType
@@ -116,7 +115,7 @@ Example - [Experimental] Sign an OCI artifact identified by a tag and referenced
 			if opts.ociLayout {
 				opts.inputType = inputTypeOCILayout
 			}
-			return experimental.CheckFlagsAndWarn(cmd, "allow-referrers-api", "oci-layout")
+			return experimental.CheckFlagsAndWarn(cmd, "oci-layout")
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
 			// timestamping
@@ -129,15 +128,6 @@ Example - [Experimental] Sign an OCI artifact identified by a tag and referenced
 				}
 			}
 
-			// allow-referrers-api flag is set
-			if cmd.Flags().Changed("allow-referrers-api") {
-				if opts.allowReferrersAPI {
-					fmt.Fprintln(os.Stderr, "Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions, use '--force-referrers-tag=false' instead.")
-					opts.forceReferrersTag = false
-				} else {
-					fmt.Fprintln(os.Stderr, "Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.")
-				}
-			}
 			return runSign(cmd, opts)
 		},
 	}
@@ -147,12 +137,11 @@ Example - [Experimental] Sign an OCI artifact identified by a tag and referenced
 	cmd.SetPflagExpiry(command.Flags(), &opts.expiry)
 	cmd.SetPflagPluginConfig(command.Flags(), &opts.pluginConfig)
 	cmd.SetPflagUserMetadata(command.Flags(), &opts.userMetadata, cmd.PflagUserMetadataSignUsage)
-	cmd.SetPflagReferrersAPI(command.Flags(), &opts.allowReferrersAPI, fmt.Sprintf(cmd.PflagReferrersUsageFormat, "sign"))
 	command.Flags().StringVar(&opts.tsaServerURL, "timestamp-url", "", "RFC 3161 Timestamping Authority (TSA) server URL")
 	command.Flags().StringVar(&opts.tsaRootCertificatePath, "timestamp-root-cert", "", "filepath of timestamp authority root certificate")
 	cmd.SetPflagReferrersTag(command.Flags(), &opts.forceReferrersTag, "force to store signatures using the referrers tag schema")
 	command.Flags().BoolVar(&opts.ociLayout, "oci-layout", false, "[Experimental] sign the artifact stored as OCI image layout")
-	command.MarkFlagsMutuallyExclusive("oci-layout", "force-referrers-tag", "allow-referrers-api")
+	command.MarkFlagsMutuallyExclusive("oci-layout", "force-referrers-tag")
 	command.MarkFlagsRequiredTogether("timestamp-url", "timestamp-root-cert")
 	experimental.HideFlags(command, experimentalExamples, []string{"oci-layout"})
 	return command
diff --git a/cmd/notation/verify.go b/cmd/notation/verify.go
index ecfec84..acf217f 100644
--- a/cmd/notation/verify.go
+++ b/cmd/notation/verify.go
@@ -16,7 +16,6 @@ package main
 import (
 	"errors"
 	"fmt"
-	"os"
 
 	"github.com/notaryproject/notation-go"
 	"github.com/notaryproject/notation/cmd/notation/internal/display"
@@ -36,7 +35,6 @@ type verifyOpts struct {
 	reference            string
 	pluginConfig         []string
 	userMetadata         []string
-	allowReferrersAPI    bool
 	ociLayout            bool
 	trustPolicyScope     string
 	inputType            inputType
@@ -82,15 +80,12 @@ Example - [Experimental] Verify a signature on an OCI artifact identified by a t
 				opts.inputType = inputTypeOCILayout
 			}
 			opts.Common.Parse(cmd)
-			return experimental.CheckFlagsAndWarn(cmd, "allow-referrers-api", "oci-layout", "scope")
+			return experimental.CheckFlagsAndWarn(cmd, "oci-layout", "scope")
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if opts.maxSignatureAttempts <= 0 {
 				return fmt.Errorf("max-signatures value %d must be a positive number", opts.maxSignatureAttempts)
 			}
-			if cmd.Flags().Changed("allow-referrers-api") {
-				fmt.Fprintln(os.Stderr, "Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.")
-			}
 			return runVerify(cmd, opts)
 		},
 	}
@@ -98,7 +93,6 @@ Example - [Experimental] Verify a signature on an OCI artifact identified by a t
 	opts.SecureFlagOpts.ApplyFlags(command.Flags())
 	command.Flags().StringArrayVar(&opts.pluginConfig, "plugin-config", nil, "{key}={value} pairs that are passed as it is to a plugin, if the verification is associated with a verification plugin, refer plugin documentation to set appropriate values")
 	cmd.SetPflagUserMetadata(command.Flags(), &opts.userMetadata, cmd.PflagUserMetadataVerifyUsage)
-	cmd.SetPflagReferrersAPI(command.Flags(), &opts.allowReferrersAPI, fmt.Sprintf(cmd.PflagReferrersUsageFormat, "verify"))
 	command.Flags().IntVar(&opts.maxSignatureAttempts, "max-signatures", 100, "maximum number of signatures to evaluate or examine")
 	command.Flags().BoolVar(&opts.ociLayout, "oci-layout", false, "[Experimental] verify the artifact stored as OCI image layout")
 	command.Flags().StringVar(&opts.trustPolicyScope, "scope", "", "[Experimental] set trust policy scope for artifact verification, required and can only be used when flag \"--oci-layout\" is set")
diff --git a/internal/cmd/flags.go b/internal/cmd/flags.go
index 0b63be8..a9d4586 100644
--- a/internal/cmd/flags.go
+++ b/internal/cmd/flags.go
@@ -101,20 +101,11 @@ var (
 		fs.StringArrayVarP(p, PflagUserMetadata.Name, PflagUserMetadata.Shorthand, nil, usage)
 	}
 
-	PflagReferrersAPI = &pflag.Flag{
-		Name: "allow-referrers-api",
-	}
-	PflagReferrersUsageFormat = "[Experimental] use the Referrers API to %s signatures, if not supported (returns 404), fallback to the Referrers tag schema"
-	SetPflagReferrersAPI      = func(fs *pflag.FlagSet, p *bool, usage string) {
-		fs.BoolVar(p, PflagReferrersAPI.Name, false, usage)
-		fs.MarkHidden(PflagReferrersAPI.Name)
-	}
-
 	PflagReferrersTag = &pflag.Flag{
 		Name: "force-referrers-tag",
 	}
 	SetPflagReferrersTag = func(fs *pflag.FlagSet, p *bool, usage string) {
-		fs.BoolVar(p, PflagReferrersTag.Name, true, usage)
+		fs.BoolVar(p, PflagReferrersTag.Name, false, usage)
 	}
 )
 
diff --git a/specs/commandline/sign.md b/specs/commandline/sign.md
index efc5dd6..379fe86 100644
--- a/specs/commandline/sign.md
+++ b/specs/commandline/sign.md
@@ -30,7 +30,7 @@ Usage:
   notation sign [flags] <reference>
 
 Flags:
-       --force-referrers-tag         force to store signatures using the referrers tag schema (default true)
+       --force-referrers-tag         force to store signatures using the referrers tag schema
   -d,  --debug                       debug mode
   -e,  --expiry duration             optional expiry that provides a "best by use" time for the artifact. The duration is specified in minutes(m) and/or hours(h). For example: 12h, 30m, 3h20m
   -h,  --help                        help for sign
@@ -205,7 +205,6 @@ export NOTATION_EXPERIMENTAL=1
 notation list --oci-layout hello-world@sha256:xxx
 ```
 
-[oci-artifact-manifest]: https://github.com/opencontainers/image-spec/blob/v1.1.0-rc2/artifact.md
 [oci-image-spec]: https://github.com/opencontainers/image-spec/blob/v1.1.0/spec.md
 [oci-referers-api]: https://github.com/opencontainers/distribution-spec/blob/v1.1.0/spec.md#listing-referrers
 [oci-image-layout]: https://github.com/opencontainers/image-spec/blob/v1.1.0/image-layout.md


Test patch:
diff --git a/cmd/notation/sign_test.go b/cmd/notation/sign_test.go
index c98b808..c7270ba 100644
--- a/cmd/notation/sign_test.go
+++ b/cmd/notation/sign_test.go
@@ -36,7 +36,7 @@ func TestSignCommand_BasicArgs(t *testing.T) {
 			Key:             "key",
 			SignatureFormat: envelope.JWS,
 		},
-		forceReferrersTag: true,
+		forceReferrersTag: false,
 	}
 	if err := command.ParseFlags([]string{
 		expected.reference,
diff --git a/test/e2e/suite/command/inspect.go b/test/e2e/suite/command/inspect.go
index 405643f..a811855 100644
--- a/test/e2e/suite/command/inspect.go
+++ b/test/e2e/suite/command/inspect.go
@@ -131,40 +131,6 @@ var _ = Describe("notation inspect", func() {
 		})
 	})
 
-	It("sign with --allow-referrers-api set", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.Exec("sign", "--allow-referrers-api", artifact.ReferenceWithDigest()).
-				MatchKeyWords(SignSuccessfully)
-
-			notation.Exec("inspect", artifact.ReferenceWithDigest(), "-v").
-				MatchKeyWords(inspectSuccessfully...)
-
-			notation.Exec("inspect", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.",
-				).
-				MatchKeyWords(inspectSuccessfully...)
-		})
-	})
-
-	It("sign with --allow-referrers-api set to false", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.Exec("sign", "--allow-referrers-api=false", artifact.ReferenceWithDigest()).
-				MatchKeyWords(SignSuccessfully)
-
-			notation.Exec("inspect", artifact.ReferenceWithDigest(), "-v").
-				MatchKeyWords(inspectSuccessfully...)
-
-			notation.Exec("inspect", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.",
-				).
-				MatchKeyWords(inspectSuccessfully...)
-		})
-	})
-
 	It("with timestamping", func() {
 		Host(BaseOptions(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
 			notation.Exec("sign", "--timestamp-url", "http://rfc3161timestamp.globalsign.com/advanced", "--timestamp-root-cert", filepath.Join(NotationE2EConfigPath, "timestamp", "globalsignTSARoot.cer"), artifact.ReferenceWithDigest()).
diff --git a/test/e2e/suite/command/list.go b/test/e2e/suite/command/list.go
index 889ccb3..7599ae9 100644
--- a/test/e2e/suite/command/list.go
+++ b/test/e2e/suite/command/list.go
@@ -111,50 +111,4 @@ var _ = Describe("notation list", func() {
 				)
 		})
 	})
-
-	It("sign with --allow-referrers-api set", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.Exec("sign", "--allow-referrers-api", artifact.ReferenceWithDigest()).
-				MatchKeyWords(SignSuccessfully)
-
-			notation.Exec("list", artifact.ReferenceWithDigest(), "-v").
-				MatchKeyWords(
-					"└── application/vnd.cncf.notary.signature",
-					"└── sha256:",
-				)
-
-			notation.Exec("list", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.",
-				).
-				MatchKeyWords(
-					"└── application/vnd.cncf.notary.signature",
-					"└── sha256:",
-				)
-		})
-	})
-
-	It("sign with --allow-referrers-api set to false", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.Exec("sign", "--allow-referrers-api=false", artifact.ReferenceWithDigest()).
-				MatchKeyWords(SignSuccessfully)
-
-			notation.Exec("list", artifact.ReferenceWithDigest(), "-v").
-				MatchKeyWords(
-					"└── application/vnd.cncf.notary.signature",
-					"└── sha256:",
-				)
-
-			notation.Exec("list", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.",
-				).
-				MatchKeyWords(
-					"└── application/vnd.cncf.notary.signature",
-					"└── sha256:",
-				)
-		})
-	})
 })
diff --git a/test/e2e/suite/command/sign.go b/test/e2e/suite/command/sign.go
index 590c5a6..970529e 100644
--- a/test/e2e/suite/command/sign.go
+++ b/test/e2e/suite/command/sign.go
@@ -30,11 +30,11 @@ var _ = Describe("notation sign", func() {
 			notation.Exec("sign", artifact.ReferenceWithDigest()).
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().WithDescription("verify by digest").
+			notation.WithDescription("verify by digest").
 				Exec("verify", artifact.ReferenceWithDigest()).
 				MatchKeyWords(VerifySuccessfully)
 
-			OldNotation().WithDescription("verify by tag").
+			notation.WithDescription("verify by tag").
 				Exec("verify", artifact.ReferenceWithTag()).
 				MatchKeyWords(VerifySuccessfully)
 		})
@@ -45,11 +45,11 @@ var _ = Describe("notation sign", func() {
 			notation.Exec("sign", "--signature-format", "cose", artifact.ReferenceWithDigest()).
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().WithDescription("verify by digest").
+			notation.WithDescription("verify by digest").
 				Exec("verify", artifact.ReferenceWithTag()).
 				MatchKeyWords(VerifySuccessfully)
 
-			OldNotation().WithDescription("verify by tag").
+			notation.WithDescription("verify by tag").
 				Exec("verify", artifact.ReferenceWithTag()).
 				MatchKeyWords(VerifySuccessfully)
 		})
@@ -61,7 +61,7 @@ var _ = Describe("notation sign", func() {
 				Exec("sign", artifact.ReferenceWithTag(), "--signature-format", "jws").
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().WithDescription("verify JWS signature").
+			notation.WithDescription("verify JWS signature").
 				Exec("verify", artifact.ReferenceWithTag()).
 				MatchKeyWords(VerifySuccessfully)
 		})
@@ -73,19 +73,19 @@ var _ = Describe("notation sign", func() {
 				Exec("sign", artifact.ReferenceWithTag(), "--signature-format", "cose").
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().WithDescription("verify COSE signature").
+			notation.WithDescription("verify COSE signature").
 				Exec("verify", artifact.ReferenceWithTag()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
 
-	It("with force-referrers-tag set", func() {
+	It("with force-referrers-tag set to true", func() {
 		Host(BaseOptions(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
 			notation.WithDescription("store signature with referrers tag schema").
-				Exec("sign", artifact.ReferenceWithDigest(), "--force-referrers-tag").
+				Exec("sign", artifact.ReferenceWithDigest(), "--force-referrers-tag=true").
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().WithDescription("verify by tag schema").
+			notation.WithDescription("verify by tag schema").
 				Exec("verify", artifact.ReferenceWithDigest(), "-v").
 				MatchKeyWords(VerifySuccessfully)
 		})
@@ -97,66 +97,12 @@ var _ = Describe("notation sign", func() {
 				Exec("sign", artifact.ReferenceWithDigest(), "--force-referrers-tag=false").
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation(BaseOptionsWithExperimental()...).WithDescription("verify by referrers api").
-				Exec("verify", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchKeyWords(VerifySuccessfully)
-		})
-	})
-
-	It("with allow-referrers-api set", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.WithDescription("store signature with Referrers API").
-				Exec("sign", artifact.ReferenceWithDigest(), "--allow-referrers-api").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions, use '--force-referrers-tag=false' instead.",
-				).
-				MatchKeyWords(SignSuccessfully)
-
-			OldNotation(BaseOptionsWithExperimental()...).WithDescription("verify by referrers api").
-				Exec("verify", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchKeyWords(VerifySuccessfully)
-		})
-	})
-
-	It("with allow-referrers-api set to false", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.WithDescription("store signature with referrers tag schema").
-				Exec("sign", artifact.ReferenceWithDigest(), "--allow-referrers-api=false").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.",
-				).
-				MatchKeyWords(SignSuccessfully)
-
-			OldNotation().WithDescription("verify by tag schema").
+			notation.WithDescription("verify by referrers api").
 				Exec("verify", artifact.ReferenceWithDigest(), "-v").
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
 
-	It("with both force-referrers-tag and allow-referrers-api set", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.WithDescription("store signature with Referrers API").
-				ExpectFailure().
-				Exec("sign", artifact.ReferenceWithDigest(), "--force-referrers-tag", "--allow-referrers-api").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"[allow-referrers-api force-referrers-tag] were all set",
-				)
-		})
-	})
-
-	It("with allow-referrers-api set and experimental off", func() {
-		Host(BaseOptions(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.WithDescription("store signature with Referrers API").
-				ExpectFailure().
-				Exec("sign", artifact.ReferenceWithDigest(), "--allow-referrers-api").
-				MatchErrKeyWords(
-					"Error: flag(s) --allow-referrers-api in \"notation sign\" is experimental and not enabled by default.")
-		})
-	})
-
 	It("with specific key", func() {
 		Host(BaseOptions(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
 			const keyName = "sKey"
@@ -165,13 +111,6 @@ var _ = Describe("notation sign", func() {
 
 			notation.Exec("sign", "--key", keyName, artifact.ReferenceWithDigest()).
 				MatchKeyWords(SignSuccessfully)
-
-			// copy the generated cert file and create the new trust policy for verify signature with generated new key.
-			OldNotation(AuthOption("", ""),
-				AddTrustStoreOption(keyName, vhost.AbsolutePath(NotationDirName, LocalKeysDirName, keyName+".crt")),
-				AddTrustPolicyOption("generate_test_trustpolicy.json", false),
-			).Exec("verify", artifact.ReferenceWithTag()).
-				MatchKeyWords(VerifySuccessfully)
 		})
 	})
 
@@ -180,7 +119,7 @@ var _ = Describe("notation sign", func() {
 			notation.Exec("sign", "--expiry", "24h", artifact.ReferenceWithDigest()).
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().Exec("verify", artifact.ReferenceWithTag()).
+			notation.Exec("verify", artifact.ReferenceWithTag()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
@@ -193,7 +132,7 @@ var _ = Describe("notation sign", func() {
 			// sleep to wait for expiry
 			time.Sleep(2100 * time.Millisecond)
 
-			OldNotation().ExpectFailure().Exec("verify", artifact.ReferenceWithDigest(), "-v").
+			notation.ExpectFailure().Exec("verify", artifact.ReferenceWithDigest(), "-v").
 				MatchErrKeyWords("expiry validation failed.").
 				MatchErrKeyWords("signature verification failed for all the signatures")
 		})
@@ -242,7 +181,7 @@ var _ = Describe("notation sign", func() {
 				MatchErrKeyWords(HTTPSRequest).
 				NoMatchErrKeyWords(HTTPRequest)
 
-			OldNotation().Exec("verify", artifact.DomainReferenceWithDigest()).
+			notation.Exec("verify", artifact.DomainReferenceWithDigest()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
@@ -254,7 +193,7 @@ var _ = Describe("notation sign", func() {
 				MatchErrKeyWords(HTTPRequest).
 				NoMatchErrKeyWords(HTTPSRequest)
 
-			OldNotation().Exec("verify", artifact.DomainReferenceWithDigest()).
+			notation.Exec("verify", artifact.DomainReferenceWithDigest()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
diff --git a/test/e2e/suite/command/verify.go b/test/e2e/suite/command/verify.go
index 9ab8d29..2dd862b 100644
--- a/test/e2e/suite/command/verify.go
+++ b/test/e2e/suite/command/verify.go
@@ -84,40 +84,6 @@ var _ = Describe("notation verify", func() {
 		})
 	})
 
-	It("sign with --allow-referrers-api set", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.Exec("sign", "--allow-referrers-api", artifact.ReferenceWithDigest()).
-				MatchKeyWords(SignSuccessfully)
-
-			notation.Exec("verify", artifact.ReferenceWithDigest(), "-v").
-				MatchKeyWords(VerifySuccessfully)
-
-			notation.Exec("verify", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.",
-				).
-				MatchKeyWords(VerifySuccessfully)
-		})
-	})
-
-	It("sign with --allow-referrers-api set to false", func() {
-		Host(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, artifact *Artifact, vhost *utils.VirtualHost) {
-			notation.Exec("sign", "--allow-referrers-api=false", artifact.ReferenceWithDigest()).
-				MatchKeyWords(SignSuccessfully)
-
-			notation.Exec("verify", artifact.ReferenceWithDigest(), "-v").
-				MatchKeyWords(VerifySuccessfully)
-
-			notation.Exec("verify", artifact.ReferenceWithDigest(), "--allow-referrers-api", "-v").
-				MatchErrKeyWords(
-					"Warning: This feature is experimental and may not be fully tested or completed and may be deprecated.",
-					"Warning: flag '--allow-referrers-api' is deprecated and will be removed in future versions.",
-				).
-				MatchKeyWords(VerifySuccessfully)
-		})
-	})
-
 	It("by digest with oci layout", func() {
 		HostWithOCILayout(BaseOptionsWithExperimental(), func(notation *utils.ExecOpts, ociLayout *OCILayout, vhost *utils.VirtualHost) {
 			notation.Exec("sign", "--oci-layout", ociLayout.ReferenceWithDigest()).
diff --git a/test/e2e/suite/plugin/sign.go b/test/e2e/suite/plugin/sign.go
index 2f6eea0..b95e8fe 100644
--- a/test/e2e/suite/plugin/sign.go
+++ b/test/e2e/suite/plugin/sign.go
@@ -50,7 +50,7 @@ var _ = Describe("notation plugin sign", func() {
 				).
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().Exec("verify", artifact.ReferenceWithDigest()).
+			notation.Exec("verify", artifact.ReferenceWithDigest()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
@@ -72,7 +72,7 @@ var _ = Describe("notation plugin sign", func() {
 				).
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().Exec("verify", artifact.ReferenceWithDigest()).
+			notation.Exec("verify", artifact.ReferenceWithDigest()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
@@ -93,7 +93,7 @@ var _ = Describe("notation plugin sign", func() {
 				).
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().Exec("verify", artifact.ReferenceWithDigest()).
+			notation.Exec("verify", artifact.ReferenceWithDigest()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})
@@ -114,7 +114,7 @@ var _ = Describe("notation plugin sign", func() {
 				).
 				MatchKeyWords(SignSuccessfully)
 
-			OldNotation().Exec("verify", artifact.ReferenceWithDigest()).
+			notation.Exec("verify", artifact.ReferenceWithDigest()).
 				MatchKeyWords(VerifySuccessfully)
 		})
 	})