diff --git a/src/corelib/text/qcollator_posix.cpp b/src/corelib/text/qcollator_posix.cpp
index 92148fa315..7f04847434 100644
--- a/src/corelib/text/qcollator_posix.cpp
+++ b/src/corelib/text/qcollator_posix.cpp
@@ -1,6 +1,7 @@
 /****************************************************************************
 **
-** Copyright (C) 2020 Aleix Pol Gonzalez <aleixpol@kde.org>
+** Copyright (C) 2021 The Qt Company Ltd.
+** Copyright (C) 2013 Aleix Pol Gonzalez <aleixpol@kde.org>
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
@@ -49,8 +50,10 @@ QT_BEGIN_NAMESPACE
 void QCollatorPrivate::init()
 {
     if (!isC()) {
-        if (locale != QLocale())
-            qWarning("Only C and default locale supported with the posix collation implementation");
+        if (locale != QLocale::system().collation()) {
+            qWarning("Only the C and system collation locales are supported "
+                     "with the POSIX collation implementation");
+        }
         if (caseSensitivity != Qt::CaseSensitive)
             qWarning("Case insensitive sorting unsupported in the posix collation implementation");
     }
diff --git a/tests/auto/corelib/text/qcollator/tst_qcollator.cpp b/tests/auto/corelib/text/qcollator/tst_qcollator.cpp
index 4935ba9cf2..ce1844f345 100644
--- a/tests/auto/corelib/text/qcollator/tst_qcollator.cpp
+++ b/tests/auto/corelib/text/qcollator/tst_qcollator.cpp
@@ -282,8 +282,8 @@ void tst_QCollator::compare()
     };
 
 #ifdef Q_OS_ANDROID
-    if (collator.locale() != QLocale())
-        QSKIP("Posix implementation of collation only supports default locale");
+    if (collator.locale() != QLocale::c() && collator.locale() != QLocale::system().collation())
+        QSKIP("POSIX implementation of collation only supports C and system collation locales");
 #endif
 
     if (numericMode)