diff --git a/doc/qtcreator/src/howto/creator-only/creator-autotest.qdoc b/doc/qtcreator/src/howto/creator-only/creator-autotest.qdoc
index 1f8990bf4e3..cae258a28bd 100644
--- a/doc/qtcreator/src/howto/creator-only/creator-autotest.qdoc
+++ b/doc/qtcreator/src/howto/creator-only/creator-autotest.qdoc
@@ -367,9 +367,9 @@
     Cleanup Functions} or \uicontrol {Show Data Functions}. Double-click a
     function in the list to open its source code in the code editor.
 
-    The test cases are listed in alphabetic order. To list them in the order in
-    which they are defined in the source code, select \inlineimage leafsort.png
-    (\uicontrol {Sort Naturally}).
+    The test cases are listed in alphabetic, case insensitive order. To list
+    them in the order in which they are defined in the source code,
+    select \inlineimage leafsort.png (\uicontrol {Sort Naturally}).
 
     \section2 Running and Debugging Tests from Code Editor
 
diff --git a/src/plugins/autotest/testtreeitem.cpp b/src/plugins/autotest/testtreeitem.cpp
index 1b68a192c74..20c46076c6b 100644
--- a/src/plugins/autotest/testtreeitem.cpp
+++ b/src/plugins/autotest/testtreeitem.cpp
@@ -130,19 +130,23 @@ bool ITestTreeItem::lessThan(const ITestTreeItem *other, ITestTreeItem::SortMode
     case Alphabetically:
         if (lhs == rhs)
             return index().row() > other->index().row();
-        return lhs > rhs;
+        return lhs.compare(rhs, Qt::CaseInsensitive) > 0;
     case Naturally: {
-        if (type() == GroupNode && other->type() == GroupNode)
-            return filePath() > other->filePath();
+        if (type() == GroupNode && other->type() == GroupNode) {
+            return filePath().toString().compare(other->filePath().toString(),
+                                                 Qt::CaseInsensitive) > 0;
+        }
 
         const Utils::Link &leftLink = data(0, LinkRole).value<Utils::Link>();
         const Utils::Link &rightLink = other->data(0, LinkRole).value<Utils::Link>();
-        if (leftLink.targetFilePath == rightLink.targetFilePath) {
+        const int comparison = leftLink.targetFilePath.toString().compare(
+                    rightLink.targetFilePath.toString(), Qt::CaseInsensitive);
+        if (comparison == 0) {
             return leftLink.targetLine == rightLink.targetLine
                     ? leftLink.targetColumn > rightLink.targetColumn
                     : leftLink.targetLine > rightLink.targetLine;
         }
-        return leftLink.targetFilePath > rightLink.targetFilePath;
+        return comparison > 0;
     }
     }
     return true;