diff --git a/cty/convert/public_test.go b/cty/convert/public_test.go
index f89220e2..3a3ee511 100644
--- a/cty/convert/public_test.go
+++ b/cty/convert/public_test.go
@@ -993,6 +993,26 @@ func TestConvert(t *testing.T) {
 				cty.NullVal(cty.DynamicPseudoType),
 			}),
 		},
+		{
+			Value: cty.MapVal(map[string]cty.Value{
+				"a": cty.StringVal("boop"),
+			}),
+			Type: cty.ObjectWithOptionalAttrs(map[string]cty.Type{
+				"a": cty.String,
+				"b": cty.String,
+				"c": cty.Object(map[string]cty.Type{
+					"d": cty.String,
+				}),
+			}, []string{"b", "c"}),
+			Want: cty.ObjectVal(map[string]cty.Value{
+				"a": cty.StringVal("boop"),
+				"b": cty.NullVal(cty.String),
+				"c": cty.NullVal(cty.Object(map[string]cty.Type{
+					"d": cty.String,
+				})),
+			}),
+			WantError: false,
+		},
 		{
 			Value: cty.ListVal([]cty.Value{
 				cty.ObjectVal(map[string]cty.Value{