diff --git a/content/oci/oci.go b/content/oci/oci.go
index 8a2f7904..8acd3dc9 100644
--- a/content/oci/oci.go
+++ b/content/oci/oci.go
@@ -509,7 +509,7 @@ func (s *Store) GC(ctx context.Context) error {
 			dgst := dgstDir.Name()
 			blobDigest := digest.NewDigestFromEncoded(digest.Algorithm(alg), dgst)
 			err := blobDigest.Validate()
-			// skip unsupported directories
+			// skip irrelevant content
 			if err != nil {
 				continue
 			}
diff --git a/content/oci/oci_test.go b/content/oci/oci_test.go
index 78d36050..f5b9fe3f 100644
--- a/content/oci/oci_test.go
+++ b/content/oci/oci_test.go
@@ -3016,7 +3016,7 @@ func TestStore_GCErrorPath(t *testing.T) {
 		t.Error("failed to push test content to src")
 	}
 
-	// test os.ReadDir() error
+	// unknown algorithm
 	if err := os.Mkdir(path.Join(algPath, "sha666"), 0777); err != nil {
 		t.Fatal(err)
 	}
@@ -3024,7 +3024,7 @@ func TestStore_GCErrorPath(t *testing.T) {
 		t.Fatal("this error should be silently ignored")
 	}
 
-	// test os.Remove() error
+	// os.Remove() error
 	badDigest := digest.FromBytes([]byte("bad digest")).Encoded()
 	badPath := path.Join(algPath, "sha256", badDigest)
 	if err := os.Mkdir(badPath, 0777); err != nil {