diff --git a/collection_test.go b/collection_test.go
index 9b9d635..e7fd8e5 100644
--- a/collection_test.go
+++ b/collection_test.go
@@ -73,3 +73,19 @@ func Test_Collection_JSON_Serialize_ok(t *testing.T) {
 
 	assert.JSONEq(t, string(expected), string(actual))
 }
+
+func Test_Collection_JSON_Deserialize_fail_outer(t *testing.T) {
+	tv := []byte(`;rubbish json;`)
+
+	var actual JSONCollection
+	err := actual.Deserialize(tv)
+	assert.EqualError(t, err, `unmarshaling JSON collection: invalid character ';' looking for beginning of value`)
+}
+
+func Test_Collection_JSON_Deserialize_fail_inner(t *testing.T) {
+	tv := []byte(`{ "a": {} }`)
+
+	var actual JSONCollection
+	err := actual.Deserialize(tv)
+	assert.EqualError(t, err, `unmarshaling JSON collection item a: json: cannot unmarshal object into Go value of type []json.RawMessage`)
+}