diff --git a/cfg/qt.cfg b/cfg/qt.cfg
index 398544377..a5d4497a1 100644
--- a/cfg/qt.cfg
+++ b/cfg/qt.cfg
@@ -945,6 +945,7 @@
   <function name="QString::compare">
     <noreturn>false</noreturn>
     <returnValue type="int"/>
+    <const/>
     <use-retval/>
     <leak-ignore/>
     <arg nr="1" direction="in">
diff --git a/test/cfg/qt.cpp b/test/cfg/qt.cpp
index 889001920..f559f0e1b 100644
--- a/test/cfg/qt.cpp
+++ b/test/cfg/qt.cpp
@@ -279,6 +279,13 @@ QVector<int>::iterator QVector2()
     return it;
 }
 
+void duplicateExpression_QString_Compare(QString style) //#8723
+{
+	// cppcheck-suppress duplicateExpression
+    if (style.compare( "x", Qt::CaseInsensitive ) == 0 || style.compare( "x", Qt::CaseInsensitive ) == 0)
+    {}
+}
+
 void QStack1(QStack<int> intStackArg)
 {
     for (int i = 0; i <= intStackArg.size(); ++i) {