diff --git a/src/core/qgsfield.cpp b/src/core/qgsfield.cpp
index 74671f22def3..0b37afd2cc86 100644
--- a/src/core/qgsfield.cpp
+++ b/src/core/qgsfield.cpp
@@ -257,11 +257,8 @@ QString QgsField::displayString( const QVariant &v ) const
   }
   else if ( d->typeName.compare( "json" ) == 0 || d->typeName.compare( "jsonb" ) == 0 )
   {
-    //this works only if the json/jsonb field contains a map - this has to be improved.
-    //toJsonDocument works only if the usertype is QJsonDocument
-    QJsonValue value = QJsonValue::fromVariant( v );
-    QJsonDocument doc( value.toObject() );
-    return QString::fromUtf8( doc.toJson( QJsonDocument::Indented ).data() );
+    QJsonDocument doc = QJsonDocument::fromVariant( v );
+    return QString::fromUtf8( doc.toJson().data() );
   }
   // Fallback if special rules do not apply
   return v.toString();
diff --git a/src/providers/postgres/qgspostgresconn.cpp b/src/providers/postgres/qgspostgresconn.cpp
index 45e0b74f2bfa..67986d50ebad 100644
--- a/src/providers/postgres/qgspostgresconn.cpp
+++ b/src/providers/postgres/qgspostgresconn.cpp
@@ -989,7 +989,7 @@ static QString doubleQuotedMapValue( const QString &v )
 
 static QString quotedMap( const QVariantMap &map )
 {
-  //should it be stored in json/jsonb as well?
+  //to store properly it should be decided if it's a hstore or a json/jsonb field here...
   QString ret;
   for ( QVariantMap::const_iterator i = map.constBegin(); i != map.constEnd(); ++i )
   {
diff --git a/src/providers/postgres/qgspostgresprovider.cpp b/src/providers/postgres/qgspostgresprovider.cpp
index bc0bdf51980f..a3522533f05a 100644
--- a/src/providers/postgres/qgspostgresprovider.cpp
+++ b/src/providers/postgres/qgspostgresprovider.cpp
@@ -2132,9 +2132,10 @@ bool QgsPostgresProvider::addFeatures( QgsFeatureList &flist, Flags flags )
                     .arg( delim,
                           quotedValue( v.toString() ) );
         }
-        //TODO: convert arrays and hstore to native types and json/jsonb
+        //TODO: convert arrays and hstore to native types
         else
         {
+          //this should be for json/jsonb in future
           values += delim + quotedValue( v );
         }
       }
@@ -3709,8 +3710,9 @@ bool QgsPostgresProvider::convertField( QgsField &field, const QMap<QString, QVa
       break;
 
     case QVariant::Map:
-      fieldType = QStringLiteral( "hstore" );
-      //or json/jsonb
+      fieldType = field.typeName();
+      if ( fieldType.isEmpty() )
+        fieldType = QStringLiteral( "hstore" );
       fieldPrec = -1;
       break;
 
diff --git a/tests/src/providers/testqgspostgresprovider.cpp b/tests/src/providers/testqgspostgresprovider.cpp
index 5b0351000cb0..ec4344bab682 100644
--- a/tests/src/providers/testqgspostgresprovider.cpp
+++ b/tests/src/providers/testqgspostgresprovider.cpp
@@ -124,28 +124,6 @@ class TestQgsPostgresProvider: public QObject
       qDebug() << "actual: " << decoded;
       QCOMPARE( decoded.toMap(), expected );
     }
-    /*
-    void decodeJsonInt()
-    {
-      const QVariant decoded = QgsPostgresProvider::convertValue( QVariant::Map, QVariant::String, QStringLiteral( "'123'" ), QStringLiteral( "json" ) );
-      QCOMPARE( decoded.type(), QVariant::Int );
-
-      int expected;
-      expected="'123'";
-      qDebug() << "actual: " << decoded;
-      QCOMPARE( decoded., expected );
-    }
-    void decodeJsonbInt()
-    {
-      const QVariant decoded = QgsPostgresProvider::convertValue( QVariant::Map, QVariant::String, QStringLiteral( "'123'" ), QStringLiteral( "jsonb" ) );
-      QCOMPARE( decoded.type(), QVariant::Int );
-
-      int expected;
-      expected=123;
-      qDebug() << "actual: " << decoded;
-      QCOMPARE( decoded.toInt(), expected );
-    }
-    */
 };
 
 QGSTEST_MAIN( TestQgsPostgresProvider )
diff --git a/tests/src/python/test_provider_postgres.py b/tests/src/python/test_provider_postgres.py
index 4e9c54910205..2525c275a618 100644
--- a/tests/src/python/test_provider_postgres.py
+++ b/tests/src/python/test_provider_postgres.py
@@ -650,8 +650,6 @@ def testJson(self):
         self.assertEqual(f.attributes()[value_idx], {'c': 4, 'd': 5})
         self.assertEqual(f.attributes()[value_idx], {'c': 4.0, 'd': 5.0})
 
-        #test int - not yet implemented
-
     def testStringArray(self):
         vl = QgsVectorLayer('%s table="qgis_test"."string_array" sql=' % (self.dbconn), "teststringarray", "postgres")
         self.assertTrue(vl.isValid())