diff --git a/tests/testprofile.cpp b/tests/testprofile.cpp
index 6dd9e898e..ef5a86adb 100644
--- a/tests/testprofile.cpp
+++ b/tests/testprofile.cpp
@@ -31,6 +31,8 @@ void TestProfile::init()
 	QCoreApplication::setOrganizationName("Subsurface");
 	QCoreApplication::setOrganizationDomain("subsurface.hohndel.org");
 	QCoreApplication::setApplicationName("Subsurface");
+
+	setlocale(LC_ALL, "C");
 }
 void TestProfile::testProfileExport()
 {