diff --git a/conformance/03_discovery_test.go b/conformance/03_discovery_test.go
index c0ab1932..89043f4e 100644
--- a/conformance/03_discovery_test.go
+++ b/conformance/03_discovery_test.go
@@ -392,7 +392,6 @@ var test03ContentDiscovery = func() {
 						manifests[4].Digest,
 						refsManifestAConfigArtifactDigest,
 						refsManifestALayerArtifactDigest,
-						testTagName,
 						refsManifestBConfigArtifactDigest,
 						refsManifestBLayerArtifactDigest,
 						refsManifestCLayerArtifactDigest,
@@ -453,7 +452,6 @@ var test03ContentDiscovery = func() {
 						manifests[4].Digest,
 						refsManifestAConfigArtifactDigest,
 						refsManifestALayerArtifactDigest,
-						testTagName,
 						refsManifestBConfigArtifactDigest,
 						refsManifestBLayerArtifactDigest,
 						refsManifestCLayerArtifactDigest,