diff --git a/src/libs/utils/devicefileaccess.cpp b/src/libs/utils/devicefileaccess.cpp
index 2ac482977ca..2f1c6632b1e 100644
--- a/src/libs/utils/devicefileaccess.cpp
+++ b/src/libs/utils/devicefileaccess.cpp
@@ -1044,6 +1044,19 @@ QByteArray UnixDeviceFileAccess::fileId(const FilePath &filePath) const
 
 FilePathInfo UnixDeviceFileAccess::filePathInfo(const FilePath &filePath) const
 {
+    if (filePath.path() == "/") // TODO: Add FilePath::isRoot()
+    {
+        const FilePathInfo r{4096,
+                             FilePathInfo::FileFlags(
+                                 FilePathInfo::ReadOwnerPerm | FilePathInfo::WriteOwnerPerm
+                                 | FilePathInfo::ExeOwnerPerm | FilePathInfo::ReadGroupPerm
+                                 | FilePathInfo::ExeGroupPerm | FilePathInfo::ReadOtherPerm
+                                 | FilePathInfo::ExeOtherPerm | FilePathInfo::DirectoryType
+                                 | FilePathInfo::LocalDiskFlag | FilePathInfo::ExistsFlag),
+                             QDateTime::currentDateTime()};
+
+        return r;
+    }
     const RunResult stat = runInShell(
         {"stat", {"-L", "-c", "%f %Y %s", filePath.path()}, OsType::OsTypeLinux});
     return FileUtils::filePathInfoFromTriple(QString::fromLatin1(stat.stdOut));
diff --git a/src/libs/utils/fileutils.cpp b/src/libs/utils/fileutils.cpp
index 44bf0bab202..efbaf912c6b 100644
--- a/src/libs/utils/fileutils.cpp
+++ b/src/libs/utils/fileutils.cpp
@@ -398,26 +398,30 @@ static FilePath qUrlToFilePath(const QUrl &url)
 
 static QUrl filePathToQUrl(const FilePath &filePath)
 {
-   return QUrl::fromLocalFile(filePath.toFSPathString());
+    return QUrl::fromLocalFile(filePath.toFSPathString());
 }
 
 void prepareNonNativeDialog(QFileDialog &dialog)
 {
+    const auto isValidSideBarPath = [](const FilePath &fp) {
+        return !fp.needsDevice() || fp.hasFileAccess();
+    };
+
     // Checking QFileDialog::itemDelegate() seems to be the only way to determine
     // whether the dialog is native or not.
     if (dialog.itemDelegate()) {
         FilePaths sideBarPaths;
 
-        // Check existing urls, remove paths that need a device and no longer exist.
+        // Check existing urls, remove paths that need a device and are no longer valid.
         for (const QUrl &url : dialog.sidebarUrls()) {
             FilePath path = qUrlToFilePath(url);
-            if (!path.needsDevice() || path.exists())
+            if (isValidSideBarPath(path))
                 sideBarPaths.append(path);
         }
 
-        // Add all device roots that are not already in the sidebar and exist.
+        // Add all device roots that are not already in the sidebar and valid.
         for (const FilePath &path : FSEngine::registeredDeviceRoots()) {
-            if (!sideBarPaths.contains(path) && path.exists())
+            if (!sideBarPaths.contains(path) && isValidSideBarPath(path))
                 sideBarPaths.append(path);
         }
 
diff --git a/src/libs/utils/fsengine/fsengine_impl.cpp b/src/libs/utils/fsengine/fsengine_impl.cpp
index b0b188b9387..078e16e56bf 100644
--- a/src/libs/utils/fsengine/fsengine_impl.cpp
+++ b/src/libs/utils/fsengine/fsengine_impl.cpp
@@ -45,6 +45,9 @@ bool FSEngineImpl::open(QIODevice::OpenMode openMode)
                                                                           createCacheData);
     bool exists = (data.filePathInfo.fileFlags & QAbstractFileEngine::ExistsFlag);
 
+    if (data.filePathInfo.fileFlags & QAbstractFileEngine::DirectoryType)
+        return false;
+
     g_filePathInfoCache.invalidate(m_filePath);
 
     ensureStorage();
diff --git a/src/shared/qbs b/src/shared/qbs
index 106316f632e..03b0537a79b 160000
--- a/src/shared/qbs
+++ b/src/shared/qbs
@@ -1 +1 @@
-Subproject commit 106316f632e9aa5673932ea78cbc6ed5b5fe19d0
+Subproject commit 03b0537a79b3050dc0e70b6f4086f513f9b87e6d
diff --git a/tests/system/shared/editor_utils.py b/tests/system/shared/editor_utils.py
index bab704d1310..665e120f7ba 100644
--- a/tests/system/shared/editor_utils.py
+++ b/tests/system/shared/editor_utils.py
@@ -374,24 +374,38 @@ def addBranchWildcardToRoot(rootNode):
     return rootNode[:pos] + " [[]*[]]" + rootNode[pos:]
 
 def openDocument(treeElement):
+    # split into tree elements
+    treePathElements = re.split(r"(?<!\\)\.", treeElement)
+    # 'unmask' the extension delimiter
+    treePathElements = list(x.replace("\\.", ".") for x in treePathElements)
     try:
+        parentIndex = None
         selectFromCombo(":Qt Creator_Core::Internal::NavComboBox", "Projects")
         navigator = waitForObject(":Qt Creator_Utils::NavigationTreeView")
-        try:
-            item = waitForObjectItem(navigator, treeElement, 3000)
-        except:
-            treeElement = addBranchWildcardToRoot(treeElement)
-            item = waitForObjectItem(navigator, treeElement)
-        expected = str(item.text).split("/")[-1]
-        for _ in range(2):
-            # Expands items as needed what might make scrollbars appear.
-            # These might cover the item to click.
-            # In this case, do it again to hit the item then.
-            doubleClickItem(navigator, treeElement, 5, 5, 0, Qt.LeftButton)
-            mainWindow = waitForObject(":Qt Creator_Core::Internal::MainWindow")
-            if waitFor("str(mainWindow.windowTitle).startswith(expected + ' ')", 5000):
-                return True
-        test.log("Expected file (%s) was not being opened in openDocument()" % expected)
+
+        for i, t in enumerate(treePathElements):
+            indices = dumpIndices(navigator.model(), parentIndex)
+            foundT = False
+            for index in indices:
+                iText = str(index.text)
+                if (iText == t
+                    or (i == 0 and re.match(t + " [[].+[]]", iText) is not None)):
+                    foundT = True
+                    parentIndex = index
+                    break
+            if not foundT:
+                raise Exception("Failed to get index '%s' (%d)." % (t, i))
+            if not navigator.isExpanded(parentIndex):
+                navigator.scrollTo(parentIndex)
+                rect = navigator.visualRect(parentIndex)
+                doubleClick(navigator, rect.x + 50, rect.y + 5, 0, Qt.LeftButton)
+        # now we should have a full expanded tree up to the requested file
+        rect = navigator.visualRect(parentIndex)
+        doubleClick(navigator, rect.x + 50, rect.y + 5, 0, Qt.LeftButton)
+        mainWindow = waitForObject(":Qt Creator_Core::Internal::MainWindow")
+        if waitFor("str(mainWindow.windowTitle).startswith(treePathElements[-1] + ' ')", 5000):
+            return True
+        test.log("Expected file (%s) was not being opened in openDocument()" % treePathElements[-1])
         return False
     except:
         t,v = sys.exc_info()[:2]