diff --git a/pkg/attest/verify_test.go b/pkg/attest/verify_test.go
index dd2c33e..9c38687 100644
--- a/pkg/attest/verify_test.go
+++ b/pkg/attest/verify_test.go
@@ -100,7 +100,7 @@ func TestVSA(t *testing.T) {
 	policyOpts := &policy.Options{
 		LocalPolicyDir: PassPolicyDir,
 	}
-	src, err := oci.ParseImageSpec("oci://"+outputLayout, oci.WithPlatform(LinuxAMD64))
+	src, err := oci.ParseImageSpec(oci.LocalPrefix+outputLayout, oci.WithPlatform(LinuxAMD64))
 	require.NoError(t, err)
 	results, err := Verify(ctx, src, policyOpts)
 	require.NoError(t, err)
@@ -158,7 +158,7 @@ func TestVerificationFailure(t *testing.T) {
 	policyOpts := &policy.Options{
 		LocalPolicyDir: FailPolicyDir,
 	}
-	src, err := oci.ParseImageSpec("oci://"+outputLayout, oci.WithPlatform(LinuxAMD64))
+	src, err := oci.ParseImageSpec(oci.LocalPrefix+outputLayout, oci.WithPlatform(LinuxAMD64))
 	require.NoError(t, err)
 	results, err := Verify(ctx, src, policyOpts)
 	require.NoError(t, err)
@@ -239,7 +239,7 @@ func TestSignVerify(t *testing.T) {
 			policyOpts := &policy.Options{
 				LocalPolicyDir: tc.policyDir,
 			}
-			src, err := oci.ParseImageSpec("oci://"+outputLayout, oci.WithPlatform(LinuxAMD64))
+			src, err := oci.ParseImageSpec(oci.LocalPrefix+outputLayout, oci.WithPlatform(LinuxAMD64))
 			require.NoError(t, err)
 			results, err := Verify(ctx, src, policyOpts)
 			if tc.expectError {
diff --git a/pkg/mirror/mirror_test.go b/pkg/mirror/mirror_test.go
index d1ad092..7a42d80 100644
--- a/pkg/mirror/mirror_test.go
+++ b/pkg/mirror/mirror_test.go
@@ -36,7 +36,7 @@ func TestSavingIndex(t *testing.T) {
 	err = SaveIndex(output, attIdx.Index, indexName)
 	require.NoError(t, err)
 
-	ociOutput, err := oci.ParseImageSpecs("oci://" + outputLayout)
+	ociOutput, err := oci.ParseImageSpecs(oci.LocalPrefix + outputLayout)
 	require.NoError(t, err)
 	err = SaveIndex(ociOutput, attIdx.Index, indexName)
 	require.NoError(t, err)
@@ -59,7 +59,7 @@ func TestSavingImage(t *testing.T) {
 	err = SaveImage(output, img, indexName)
 	require.NoError(t, err)
 
-	ociOutput, err := oci.ParseImageSpec("oci://" + outputLayout)
+	ociOutput, err := oci.ParseImageSpec(oci.LocalPrefix + outputLayout)
 	require.NoError(t, err)
 	err = SaveImage(ociOutput, img, indexName)
 	require.NoError(t, err)
diff --git a/pkg/oci/oci_test.go b/pkg/oci/oci_test.go
index 545ad36..3039aac 100644
--- a/pkg/oci/oci_test.go
+++ b/pkg/oci/oci_test.go
@@ -95,10 +95,10 @@ func TestWithoutTag(t *testing.T) {
 		{name: "image:tag", expected: "index.docker.io/library/image"},
 		{name: "image", expected: "index.docker.io/library/image"},
 		{name: "image:sha256-digest.att", expected: "index.docker.io/library/image"},
-		{name: "docker://image:tag", expected: "docker://index.docker.io/library/image"},
+		{name: RegistryPrefix + "image:tag", expected: RegistryPrefix + "index.docker.io/library/image"},
 		{name: "image@sha256:166710df254975d4a6c4c407c315951c22753dcaa829e020a3fd5d18fff70dd2", expected: "index.docker.io/library/image"},
-		{name: "docker://image@sha256:166710df254975d4a6c4c407c315951c22753dcaa829e020a3fd5d18fff70dd2", expected: "docker://index.docker.io/library/image"},
-		{name: "docker://127.0.0.1:36555/repo:latest", expected: "docker://127.0.0.1:36555/repo"},
+		{name: RegistryPrefix + "image@sha256:166710df254975d4a6c4c407c315951c22753dcaa829e020a3fd5d18fff70dd2", expected: RegistryPrefix + "index.docker.io/library/image"},
+		{name: RegistryPrefix + "127.0.0.1:36555/repo:latest", expected: RegistryPrefix + "127.0.0.1:36555/repo"},
 	}
 	for _, c := range tc {
 		t.Run(c.name, func(t *testing.T) {
@@ -116,11 +116,11 @@ func TestReplaceTag(t *testing.T) {
 		{name: "image:tag", expected: "index.docker.io/library/image:sha256-digest.att"},
 		{name: "image", expected: "index.docker.io/library/image:sha256-digest.att"},
 		{name: "image:sha256-digest.att", expected: "index.docker.io/library/image:sha256-digest.att"},
-		{name: "docker://image:tag", expected: "docker://index.docker.io/library/image:sha256-digest.att"},
+		{name: RegistryPrefix + "image:tag", expected: RegistryPrefix + "index.docker.io/library/image:sha256-digest.att"},
 		{name: "image@sha256:166710df254975d4a6c4c407c315951c22753dcaa829e020a3fd5d18fff70dd2", expected: "index.docker.io/library/image:sha256-digest.att"},
-		{name: "oci://foobar", expected: "oci://foobar"},
-		{name: "docker://image@sha256:166710df254975d4a6c4c407c315951c22753dcaa829e020a3fd5d18fff70dd2", expected: "docker://index.docker.io/library/image:sha256-digest.att"},
-		{name: "docker://127.0.0.1:36555/repo:latest", expected: "docker://127.0.0.1:36555/repo:sha256-digest.att"},
+		{name: LocalPrefix + "foobar", expected: LocalPrefix + "foobar"},
+		{name: RegistryPrefix + "image@sha256:166710df254975d4a6c4c407c315951c22753dcaa829e020a3fd5d18fff70dd2", expected: RegistryPrefix + "index.docker.io/library/image:sha256-digest.att"},
+		{name: RegistryPrefix + "127.0.0.1:36555/repo:latest", expected: RegistryPrefix + "127.0.0.1:36555/repo:sha256-digest.att"},
 	}
 
 	digest := v1.Hash{