diff --git a/src/core/qgsfield.cpp b/src/core/qgsfield.cpp
index 0b37afd2cc86..bf61ca0e9e85 100644
--- a/src/core/qgsfield.cpp
+++ b/src/core/qgsfield.cpp
@@ -24,7 +24,6 @@
 #include <QIcon>
 #include <QLocale>
 #include <QJsonDocument>
-#include <QJsonObject>
 
 /***************************************************************************
  * This class is considered CRITICAL and any change MUST be accompanied with
diff --git a/src/providers/postgres/qgspostgresprovider.cpp b/src/providers/postgres/qgspostgresprovider.cpp
index a3522533f05a..2ec15a8fc98e 100644
--- a/src/providers/postgres/qgspostgresprovider.cpp
+++ b/src/providers/postgres/qgspostgresprovider.cpp
@@ -4221,11 +4221,8 @@ static QVariant parseJson( const QString &txt )
 {
   QVariant result;
   QJsonDocument jsonResponse = QJsonDocument::fromJson( txt.toUtf8() );
-  //it's null when no json format
+  //it's null if no json format
   result = jsonResponse.toVariant();
-
-  //TODO json/jsonb convert toVariantMap from QJsonObject in case it's a map etc.
-  //we can check there with jsonResponse.isArray if it's an array etc.
   return result;
 }
 
diff --git a/tests/testdata/provider/testdata_pg_json.sql b/tests/testdata/provider/testdata_pg_json.sql
index e25262de6f5e..6e53dd123d17 100644
--- a/tests/testdata/provider/testdata_pg_json.sql
+++ b/tests/testdata/provider/testdata_pg_json.sql
@@ -11,5 +11,4 @@ CREATE TABLE qgis_test.json
 INSERT INTO qgis_test.json(jvalue, jbvalue)
   VALUES
     ('[1,2,3]', '[4,5,6]'),
-    ('{"a":1,"b":2}', '{"c":4,"d":5}'),
-    ('123', '456');
+    ('{"a":1,"b":2}', '{"c":4,"d":5}');