diff --git a/src/core/forwardingslavebase.cpp b/src/core/forwardingslavebase.cpp
--- a/src/core/forwardingslavebase.cpp
+++ b/src/core/forwardingslavebase.cpp
@@ -17,9 +17,6 @@
    Boston, MA 02110-1301, USA.
 */
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_ASCII
-
 #include "forwardingslavebase.h"
 #include "../pathhelpers_p.h"
 
@@ -91,7 +88,7 @@
 {
     bool result = true;
 
-    if (url.scheme() == q->mProtocol) {
+    if (url.scheme() == QLatin1String(q->mProtocol)) {
         result = q->rewriteUrl(url, newURL);
     } else {
         newURL = url;
diff --git a/src/core/kremoteencoding.cpp b/src/core/kremoteencoding.cpp
--- a/src/core/kremoteencoding.cpp
+++ b/src/core/kremoteencoding.cpp
@@ -16,9 +16,6 @@
    Boston, MA 02110-1301, USA.
 */
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_BYTEARRAY
-
 #include "kremoteencoding.h"
 
 #include <kstringhandler.h>
@@ -97,7 +94,8 @@
 
 const char *KRemoteEncoding::encoding() const
 {
-    return d->m_codec->name();
+    // KF6 TODO: return QByteArray
+    return d->m_codec->name().constData();
 }
 
 int KRemoteEncoding::encodingMib() const
diff --git a/src/core/slavebase.h b/src/core/slavebase.h
--- a/src/core/slavebase.h
+++ b/src/core/slavebase.h
@@ -1029,6 +1029,12 @@
     virtual void virtual_hook(int id, void *data);
 
 private:
+    // Convenience function converting mProtocol to QString as unsupportedActionErrorString(), which
+    // is used in many places in the code, takes a QString parameter
+    inline const QString protocolName() const {
+        return QString::fromLatin1(mProtocol);
+    }
+
     // This helps catching missing tr()/i18n() calls in error().
     void error(int _errid, const QByteArray &_text);
     void send(int cmd, const QByteArray &arr = QByteArray());
diff --git a/src/core/slavebase.cpp b/src/core/slavebase.cpp
--- a/src/core/slavebase.cpp
+++ b/src/core/slavebase.cpp
@@ -21,9 +21,6 @@
  *
  **/
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_ASCII
-
 #include "slavebase.h"
 
 #include <config-kiocore.h>
@@ -210,7 +207,7 @@
         KIO_STATE_ASSERT(finalState(),
                          Q_FUNC_INFO,
                          qUtf8Printable(QStringLiteral("%1 did not call finished() or error()! Please fix the %2 KIO slave")
-                                        .arg(cmdName)
+                                        .arg(QLatin1String(cmdName))
                                         .arg(QCoreApplication::applicationName())));
         // Force the command into finished state. We'll not reach this for Debug builds
         // that fail the assertion. For Release builds we'll have made sure that the
@@ -226,7 +223,7 @@
         KIO_STATE_ASSERT(!finalState(),
                          Q_FUNC_INFO,
                          qUtf8Printable(QStringLiteral("%1 called finished() or error(), but it's not supposed to! Please fix the %2 KIO slave")
-                                        .arg(cmdName)
+                                        .arg(QLatin1String(cmdName))
                                         .arg(QCoreApplication::applicationName())));
     }
 
@@ -903,97 +900,97 @@
 
 void SlaveBase::openConnection()
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_CONNECT));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_CONNECT));
 }
 void SlaveBase::closeConnection()
 { } // No response!
 void SlaveBase::stat(QUrl const &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_STAT));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_STAT));
 }
 void SlaveBase::put(QUrl const &, int, JobFlags)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_PUT));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_PUT));
 }
 void SlaveBase::special(const QByteArray &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_SPECIAL));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_SPECIAL));
 }
 void SlaveBase::listDir(QUrl const &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_LISTDIR));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_LISTDIR));
 }
 void SlaveBase::get(QUrl const &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_GET));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_GET));
 }
 void SlaveBase::open(QUrl const &, QIODevice::OpenMode)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_OPEN));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_OPEN));
 }
 void SlaveBase::read(KIO::filesize_t)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_READ));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_READ));
 }
 void SlaveBase::write(const QByteArray &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_WRITE));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_WRITE));
 }
 void SlaveBase::seek(KIO::filesize_t)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_SEEK));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_SEEK));
 }
 void SlaveBase::close()
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_CLOSE));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_CLOSE));
 }
 void SlaveBase::mimetype(QUrl const &url)
 {
     get(url);
 }
 void SlaveBase::rename(QUrl const &, QUrl const &, JobFlags)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_RENAME));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_RENAME));
 }
 void SlaveBase::symlink(QString const &, QUrl const &, JobFlags)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_SYMLINK));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_SYMLINK));
 }
 void SlaveBase::copy(QUrl const &, QUrl const &, int, JobFlags)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_COPY));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_COPY));
 }
 void SlaveBase::del(QUrl const &, bool)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_DEL));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_DEL));
 }
 void SlaveBase::setLinkDest(const QUrl &, const QString &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_SETLINKDEST));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_SETLINKDEST));
 }
 void SlaveBase::mkdir(QUrl const &, int)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_MKDIR));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_MKDIR));
 }
 void SlaveBase::chmod(QUrl const &, int)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_CHMOD));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_CHMOD));
 }
 void SlaveBase::setModificationTime(QUrl const &, const QDateTime &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_SETMODIFICATIONTIME));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_SETMODIFICATIONTIME));
 }
 void SlaveBase::chown(QUrl const &, const QString &, const QString &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_CHOWN));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_CHOWN));
 }
 void SlaveBase::setSubUrl(QUrl const &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_SUBURL));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_SUBURL));
 }
 void SlaveBase::multiGet(const QByteArray &)
 {
-    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_MULTI_GET));
+    error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_MULTI_GET));
 }
 
 void SlaveBase::slave_status()
@@ -1500,7 +1497,7 @@
 
     switch(id) {
     case GetFileSystemFreeSpace: {
-        error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(mProtocol, CMD_FILESYSTEMFREESPACE));
+        error(ERR_UNSUPPORTED_ACTION, unsupportedActionErrorString(protocolName(), CMD_FILESYSTEMFREESPACE));
     } break;
     }
 }
diff --git a/src/filewidgets/kencodingfiledialog.cpp b/src/filewidgets/kencodingfiledialog.cpp
--- a/src/filewidgets/kencodingfiledialog.cpp
+++ b/src/filewidgets/kencodingfiledialog.cpp
@@ -20,9 +20,6 @@
     Boston, MA 02110-1301, USA.
 */
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_ASCII
-
 #include "kencodingfiledialog.h"
 
 #include "kfilewidget.h"
@@ -88,7 +85,7 @@
 
     d->encoding->clear();
     QString sEncoding = encoding;
-    QString systemEncoding = QTextCodec::codecForLocale()->name();
+    QString systemEncoding = QLatin1String(QTextCodec::codecForLocale()->name());
     if (sEncoding.isEmpty() || sEncoding == QLatin1String("System")) {
         sEncoding = systemEncoding;
     }
@@ -102,12 +99,13 @@
 
         if (found) {
             d->encoding->addItem(encoding);
-            if ((codecForEnc->name() == sEncoding) || (encoding == sEncoding)) {
+            const QString codecName = QLatin1String(codecForEnc->name());
+            if ((codecName == sEncoding) || (encoding == sEncoding)) {
                 d->encoding->setCurrentIndex(insert);
                 foundRequested = true;
             }
 
-            if ((codecForEnc->name() == systemEncoding) || (encoding == systemEncoding)) {
+            if ((codecName == systemEncoding) || (encoding == systemEncoding)) {
                 system = insert;
             }
             insert++;
diff --git a/src/filewidgets/kfileplacesitem.cpp b/src/filewidgets/kfileplacesitem.cpp
--- a/src/filewidgets/kfileplacesitem.cpp
+++ b/src/filewidgets/kfileplacesitem.cpp
@@ -318,15 +318,15 @@
 }
 
 KBookmark KFilePlacesItem::createSystemBookmark(KBookmarkManager *manager,
-        const QString &translationContext,
-        const QString &untranslatedLabel,
+        const char *translationContext,
+        const QByteArray &untranslatedLabel,
         const QUrl &url,
         const QString &iconName)
 {
     Q_UNUSED(translationContext); // parameter is only necessary to force the caller
     // to provide a marked-for-translation string for the label, with context
 
-    KBookmark bookmark = createBookmark(manager, untranslatedLabel, url, iconName);
+    KBookmark bookmark = createBookmark(manager, QString::fromUtf8(untranslatedLabel), url, iconName);
     if (!bookmark.isNull()) {
         bookmark.setMetaDataItem(QStringLiteral("isSystemItem"), QStringLiteral("true"));
     }
@@ -349,7 +349,7 @@
 KBookmark KFilePlacesItem::createTagBookmark(KBookmarkManager *manager,
         const QString &tag)
 {
-    KBookmark bookmark = createSystemBookmark(manager, tag, tag, QUrl(QLatin1String("tags:/") + tag), QLatin1String("tag"));
+    KBookmark bookmark = createSystemBookmark(manager, tag.toUtf8().data(), tag.toUtf8(), QUrl(QLatin1String("tags:/") + tag), QLatin1String("tag"));
     bookmark.setMetaDataItem(QStringLiteral("tag"), tag);
     bookmark.setMetaDataItem(QStringLiteral("isSystemItem"), QStringLiteral("true"));
 
diff --git a/src/filewidgets/kfileplacesitem_p.h b/src/filewidgets/kfileplacesitem_p.h
--- a/src/filewidgets/kfileplacesitem_p.h
+++ b/src/filewidgets/kfileplacesitem_p.h
@@ -76,8 +76,8 @@
                                     const QString &iconName,
                                     KFilePlacesItem *after = nullptr);
     static KBookmark createSystemBookmark(KBookmarkManager *manager,
-                                          const QString &translationContext,
-                                          const QString &untranslatedLabel,
+                                          const char *translationContext,
+                                          const QByteArray &untranslatedLabel,
                                           const QUrl &url,
                                           const QString &iconName);
     static KBookmark createDeviceBookmark(KBookmarkManager *manager,
diff --git a/src/filewidgets/kfileplacesmodel.cpp b/src/filewidgets/kfileplacesmodel.cpp
--- a/src/filewidgets/kfileplacesmodel.cpp
+++ b/src/filewidgets/kfileplacesmodel.cpp
@@ -18,9 +18,6 @@
 
 */
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_ASCII
-
 #include "kfileplacesmodel.h"
 #include "kfileplacesitem_p.h"
 
@@ -184,7 +181,9 @@
                     }
 
                     if (!existingBookmarks.contains(QUrl(tagsUrlBase))) {
-                        KBookmark alltags = KFilePlacesItem::createSystemBookmark(bookmarkManager, QStringLiteral("All tags"), i18n("All tags"), QUrl(tagsUrlBase), QStringLiteral("tag"));
+                        KBookmark alltags = KFilePlacesItem::createSystemBookmark(bookmarkManager, "All tags"
+                                                                                  , i18n("All tags").toUtf8().data()
+                                                                                  , QUrl(tagsUrlBase), QStringLiteral("tag"));
                     }
                 }
 
@@ -276,7 +275,6 @@
     };
 
     if (root.first().isNull() || !QFile::exists(file)) {
-
         // NOTE: The context for these I18NC_NOOP calls has to be "KFile System Bookmarks".
         // The real i18nc call is made later, with this context, so the two must match.
         // createSystemBookmark actually does nothing with its second argument, the context,
@@ -342,7 +340,7 @@
         setDefaultMetadataItemForGroup(RecentlySavedType);
 
         // Move The recently used bookmarks below the trash, making it the first element in the Recent group
-        KBookmark trashBookmark = bookmarkForUrl(QUrl("trash:/"));
+        KBookmark trashBookmark = bookmarkForUrl(QUrl(QStringLiteral("trash:/")));
         if (!trashBookmark.isNull()) {
             root.moveBookmark(recentFilesBookmark, trashBookmark);
             root.moveBookmark(recentDirectoriesBookmark, recentFilesBookmark);
diff --git a/src/ioslaves/ftp/CMakeLists.txt b/src/ioslaves/ftp/CMakeLists.txt
--- a/src/ioslaves/ftp/CMakeLists.txt
+++ b/src/ioslaves/ftp/CMakeLists.txt
@@ -1,8 +1,6 @@
 
 project(kioslave-ftp)
 
-remove_definitions(-DQT_NO_CAST_FROM_ASCII) # TODO REMOVE
-
 include(ConfigureChecks.cmake)
 configure_file(config-kioslave-ftp.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-kioslave-ftp.h )
 
diff --git a/src/ioslaves/ftp/ftp.cpp b/src/ioslaves/ftp/ftp.cpp
--- a/src/ioslaves/ftp/ftp.cpp
+++ b/src/ioslaves/ftp/ftp.cpp
@@ -1217,7 +1217,7 @@
     // When deleting a directory, we must exit from it first
     // The last command probably went into it (to stat it)
     if (!isfile) {
-        (void) ftpFolder(q->remoteEncoding()->directory(url));    // ignore errors
+        (void) ftpFolder(q->remoteEncoding()->decode(q->remoteEncoding()->directory(url)));    // ignore errors
     }
 
     const QByteArray cmd = (isfile ? "DELE " : "RMD ") + q->remoteEncoding()->encode(url);
@@ -2343,7 +2343,7 @@
 
 bool FtpInternal::isSocksProxyScheme(const QString &scheme)
 {
-    return scheme == "socks" || scheme == "socks5";
+    return scheme == QLatin1String("socks") || scheme == QLatin1String("socks5");
 }
 
 bool FtpInternal::isSocksProxy() const
diff --git a/src/kcms/kio/kcookiespolicies.cpp b/src/kcms/kio/kcookiespolicies.cpp
--- a/src/kcms/kio/kcookiespolicies.cpp
+++ b/src/kcms/kio/kcookiespolicies.cpp
@@ -24,9 +24,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_ASCII
-
 // Own
 #include "kcookiespolicies.h"
 
@@ -177,7 +174,7 @@
 
     KCookiesPolicySelectionDlg pdlg (this);
     pdlg.setWindowTitle (i18nc ("@title:window", "Change Cookie Policy"));
-    pdlg.setPolicy (KCookieAdvice::strToAdvice (mDomainPolicyMap.value(oldDomain)));
+    pdlg.setPolicy (KCookieAdvice::strToAdvice(QString::fromLatin1(mDomainPolicyMap.value(oldDomain))));
     pdlg.setEnableHostEdit (state, oldDomain);
 
     if (pdlg.exec() && !pdlg.domain().isEmpty()) {
@@ -366,22 +363,23 @@
     group.writeEntry ("AcceptSessionCookies", state);
 
     QString advice;
-    if (mUi.rbPolicyAccept->isChecked())
-        advice = KCookieAdvice::adviceToStr (KCookieAdvice::Accept);
-    else if (mUi.rbPolicyAcceptForSession->isChecked())
-        advice = KCookieAdvice::adviceToStr (KCookieAdvice::AcceptForSession);
-    else if (mUi.rbPolicyReject->isChecked())
-        advice = KCookieAdvice::adviceToStr (KCookieAdvice::Reject);
-    else
-        advice = KCookieAdvice::adviceToStr (KCookieAdvice::Ask);
+    if (mUi.rbPolicyAccept->isChecked()) {
+        advice = QString::fromLatin1(KCookieAdvice::adviceToStr(KCookieAdvice::Accept));
+    } else if (mUi.rbPolicyAcceptForSession->isChecked()) {
+         advice = QString::fromLatin1(KCookieAdvice::adviceToStr(KCookieAdvice::AcceptForSession));
+    } else if (mUi.rbPolicyReject->isChecked()) {
+        advice = QString::fromLatin1(KCookieAdvice::adviceToStr(KCookieAdvice::Reject));
+    } else {
+        advice = QString::fromLatin1(KCookieAdvice::adviceToStr(KCookieAdvice::Ask));
+    }
 
     group.writeEntry ("CookieGlobalAdvice", advice);
 
     QStringList domainConfig;
     QMapIterator<QString, const char*> it (mDomainPolicyMap);
     while (it.hasNext()) {
         it.next();
-        const QString policy = tolerantToAce(it.key()) + QLatin1Char(':') + QLatin1String(it.value());
+        const QString policy = QLatin1String(tolerantToAce(it.key())) + QLatin1Char(':') + QLatin1String(it.value());
         domainConfig << policy;
     }
 
diff --git a/src/kcms/kio/smbrodlg.cpp b/src/kcms/kio/smbrodlg.cpp
--- a/src/kcms/kio/smbrodlg.cpp
+++ b/src/kcms/kio/smbrodlg.cpp
@@ -18,9 +18,6 @@
     Boston, MA 02110-1301, USA.
 */
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_ASCII
-
 // Own
 #include "smbrodlg.h"
 
@@ -122,7 +119,7 @@
       unsigned int a2 = qc2.toLatin1() - 'A';
       unsigned int a3 = qc3.toLatin1() - '0';
       unsigned int num = ((a1 & 0x3F) << 10) | ((a2& 0x1F) << 5) | (a3 & 0x1F);
-      password[i] = QChar((uchar)((num - 17) ^ 173)); // restore
+      password[i] = QLatin1Char((num - 17) ^ 173); // restore
    }
    m_passwordLe->setText(password);
 
@@ -149,9 +146,9 @@
       unsigned int a1 = (num & 0xFC00) >> 10;
       unsigned int a2 = (num & 0x3E0) >> 5;
       unsigned int a3 = (num & 0x1F);
-      scrambled += (char)(a1+'0');
-      scrambled += (char)(a2+'A');
-      scrambled += (char)(a3+'0');
+      scrambled += QLatin1Char((char)(a1+'0'));
+      scrambled += QLatin1Char((char)(a2+'A'));
+      scrambled += QLatin1Char((char)(a3+'0'));
    }
    group.writeEntry( "Password", scrambled);
 
diff --git a/src/kioexec/main.cpp b/src/kioexec/main.cpp
--- a/src/kioexec/main.cpp
+++ b/src/kioexec/main.cpp
@@ -19,9 +19,6 @@
    Boston, MA 02110-1301, USA.
 */
 
-// TODO: remove me
-#undef QT_NO_CAST_FROM_ASCII
-
 #include "main.h"
 #include "kio_version.h"
 #include "kioexecdinterface.h"
@@ -199,7 +196,7 @@
     // Store modification times
     QList<FileInfo>::Iterator it = fileList.begin();
     for (; it != fileList.end() ; ++it) {
-        QFileInfo info(QFile::encodeName(it->path));
+        QFileInfo info(it->path);
         it->time = info.lastModified();
         QUrl url = QUrl::fromLocalFile(it->path);
         list << url;
@@ -262,7 +259,7 @@
             QThread::currentThread()->sleep(sleepSecs);
             const QString parentDir = info.path();
             qDebug() << sleepSecs << "seconds have passed, deleting" << info.filePath();
-            QFile(QFile::encodeName(src)).remove();
+            QFile(src).remove();
             // NOTE: this is not necessarily a temporary directory.
             if (QDir().rmdir(parentDir)) {
                 qDebug() << "Removed empty parent directory" << parentDir;
diff --git a/src/kpasswdserver/autotests/CMakeLists.txt b/src/kpasswdserver/autotests/CMakeLists.txt
--- a/src/kpasswdserver/autotests/CMakeLists.txt
+++ b/src/kpasswdserver/autotests/CMakeLists.txt
@@ -1,8 +1,5 @@
 include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/.. ${CMAKE_CURRENT_BINARY_DIR}/.. )
 
-remove_definitions(-DQT_NO_CAST_FROM_ASCII)
-remove_definitions(-DQT_NO_CAST_FROM_BYTEARRAY)
-
 set (kpasswdserver_test_SRCS
  kpasswdservertest.cpp
  ../kpasswdserver.cpp
diff --git a/src/kpasswdserver/autotests/kpasswdservertest.cpp b/src/kpasswdserver/autotests/kpasswdservertest.cpp
--- a/src/kpasswdserver/autotests/kpasswdservertest.cpp
+++ b/src/kpasswdserver/autotests/kpasswdservertest.cpp
@@ -301,7 +301,7 @@
         QList<KIO::AuthInfo> authInfos;
         for (int i=0; i < 10; ++i) {
            KIO::AuthInfo info;
-           info.url = QUrl("http://www.example.com/test" + QString::number(i) + ".html");
+           info.url = QUrl(QLatin1String("http://www.example.com/test") + QString::number(i) + QLatin1String(".html"));
            authInfos << info;
         }
 
@@ -322,7 +322,7 @@
         QList<KIO::AuthInfo> authInfos;
         for (int i=0; i < 10; ++i) {
            KIO::AuthInfo info;
-           info.url = QUrl("http://www.example.com/test" + QString::number(i) + ".html");
+           info.url = QUrl(QLatin1String("http://www.example.com/test") + QString::number(i) + QStringLiteral(".html"));
            authInfos << info;
         }