diff --git a/tests/src/python/test_qgsfieldformatters.py b/tests/src/python/test_qgsfieldformatters.py
index 6e7778cba5a0..f86ef1ad703d 100644
--- a/tests/src/python/test_qgsfieldformatters.py
+++ b/tests/src/python/test_qgsfieldformatters.py
@@ -266,8 +266,14 @@ def setUpClass(cls):
         QCoreApplication.setOrganizationDomain("QGIS_TestPyQgsColorScheme.com")
         QCoreApplication.setApplicationName("QGIS_TestPyQgsColorScheme")
         QgsSettings().clear()
+        QLocale.setDefault(QLocale.c())
         start_app()
 
+    @classmethod
+    def tearDownClass(cls):
+        """Reset locale"""
+        QLocale.setDefault(QLocale.c())
+
     def test_representValue(self):
 
         layer = QgsVectorLayer("point?field=int:integer&field=double:double&field=long:long",
@@ -277,8 +283,6 @@ def test_representValue(self):
 
         fieldFormatter = QgsRangeFieldFormatter()
 
-        QLocale.setDefault(QLocale.c())
-
         # Precision is ignored for integers and longlongs
         self.assertEqual(fieldFormatter.representValue(layer, 0, {'Precision': 1}, None, '123'), '123')
         self.assertEqual(fieldFormatter.representValue(layer, 0, {'Precision': 1}, None, '123000'), '123000')