diff --git a/internal/resolver/memory.go b/internal/resolver/memory.go
index 27d6a59d..2111d504 100644
--- a/internal/resolver/memory.go
+++ b/internal/resolver/memory.go
@@ -48,8 +48,8 @@ func (m *Memory) Tag(_ context.Context, desc ocispec.Descriptor, reference strin
 	return nil
 }
 
-// Delete removes a reference from index map.
-func (m *Memory) Delete(reference string) {
+// Untag removes a reference from index map.
+func (m *Memory) Untag(reference string) {
 	m.index.Delete(reference)
 }
 
diff --git a/internal/resolver/memory_test.go b/internal/resolver/memory_test.go
index fe365cca..f6f04b06 100644
--- a/internal/resolver/memory_test.go
+++ b/internal/resolver/memory_test.go
@@ -55,7 +55,7 @@ func TestMemorySuccess(t *testing.T) {
 		t.Errorf("Memory.Map() = %v, want %v", got, 1)
 	}
 
-	s.Delete(ref)
+	s.Untag(ref)
 	_, err = s.Resolve(ctx, ref)
 	if !errors.Is(err, errdef.ErrNotFound) {
 		t.Errorf("Memory.Resolve() error = %v, want %v", err, errdef.ErrNotFound)