diff --git a/acceptance/image/image.go b/acceptance/image/image.go
index 7b8dd1231..f46ab1ca2 100644
--- a/acceptance/image/image.go
+++ b/acceptance/image/image.go
@@ -72,7 +72,6 @@ const (
 )
 
 const (
-	unknownConfig       = "application/vnd.unknown.config.v1+json"
 	openPolicyAgentData = "application/vnd.cncf.openpolicyagent.data.layer.v1+json"
 	title               = "org.opencontainers.image.title"
 )
@@ -856,7 +855,7 @@ func createAndPushKeylessImage(ctx context.Context, imageName string) (context.C
 // layers
 func createAndPushPolicyBundle(ctx context.Context, imageName string, files *godog.Table) (context.Context, error) {
 	bundle := mutate.MediaType(empty.Image, types.OCIManifestSchema1)
-	bundle = mutate.ConfigMediaType(bundle, unknownConfig)
+	bundle = mutate.ConfigMediaType(bundle, types.OCIConfigJSON)
 
 	// add each row as a layer to the bundle
 	for _, row := range files.Rows {
diff --git a/internal/tracker/oci.go b/internal/tracker/oci.go
index cb207beb4..fd9e70c9f 100644
--- a/internal/tracker/oci.go
+++ b/internal/tracker/oci.go
@@ -33,7 +33,6 @@ import (
 )
 
 const (
-	unknownConfig       = "application/vnd.unknown.config.v1+json"
 	openPolicyAgentData = "application/vnd.cncf.openpolicyagent.data.layer.v1+json"
 	title               = "org.opencontainers.image.title"
 	dataFileTitle       = "data/data/trusted_tekton_tasks.yml"
@@ -117,7 +116,7 @@ func PushImage(ctx context.Context, imageRef string, data []byte, invocation str
 	}
 
 	bundle := mutate.MediaType(empty.Image, types.OCIManifestSchema1)
-	bundle = mutate.ConfigMediaType(bundle, unknownConfig)
+	bundle = mutate.ConfigMediaType(bundle, types.OCIConfigJSON)
 	if bundle, err = mutate.Append(bundle, mutate.Addendum{
 		History: v1.History{
 			CreatedBy: invocation,
diff --git a/internal/tracker/oci_test.go b/internal/tracker/oci_test.go
index edcb1393d..13621e9f2 100644
--- a/internal/tracker/oci_test.go
+++ b/internal/tracker/oci_test.go
@@ -117,7 +117,7 @@ func TestPullImage(t *testing.T) {
 	yaml := []byte("data: blah")
 
 	img := mutate.MediaType(empty.Image, types.OCIManifestSchema1)
-	img = mutate.ConfigMediaType(img, unknownConfig)
+	img = mutate.ConfigMediaType(img, types.OCIConfigJSON)
 	img, err := mutate.Append(img, mutate.Addendum{
 		MediaType: openPolicyAgentData,
 		Layer:     static.NewLayer(yaml, openPolicyAgentData),