diff --git a/autotests/integration/activation_test.cpp b/autotests/integration/activation_test.cpp
index 6d2da4dc6c..c41f23ecbf 100644
--- a/autotests/integration/activation_test.cpp
+++ b/autotests/integration/activation_test.cpp
@@ -51,7 +51,7 @@ void ActivationTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/activities_test.cpp b/autotests/integration/activities_test.cpp
index 4c0a6e6154..cad94a7701 100644
--- a/autotests/integration/activities_test.cpp
+++ b/autotests/integration/activities_test.cpp
@@ -51,7 +51,7 @@ void ActivitiesTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->setUseKActivities(true);
diff --git a/autotests/integration/dbus_interface_test.cpp b/autotests/integration/dbus_interface_test.cpp
index 316c2795d0..2fa7fe09c0 100644
--- a/autotests/integration/dbus_interface_test.cpp
+++ b/autotests/integration/dbus_interface_test.cpp
@@ -59,7 +59,7 @@ void TestDbusInterface::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->start();
     QVERIFY(applicationStartedSpy.wait());
diff --git a/autotests/integration/debug_console_test.cpp b/autotests/integration/debug_console_test.cpp
index 6ec625f184..8b1ea8325c 100644
--- a/autotests/integration/debug_console_test.cpp
+++ b/autotests/integration/debug_console_test.cpp
@@ -51,7 +51,7 @@ void DebugConsoleTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/decoration_input_test.cpp b/autotests/integration/decoration_input_test.cpp
index 9e465fcf4d..3e6b11ad3b 100644
--- a/autotests/integration/decoration_input_test.cpp
+++ b/autotests/integration/decoration_input_test.cpp
@@ -123,7 +123,7 @@ void DecorationInputTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     // change some options
diff --git a/autotests/integration/desktop_window_x11_test.cpp b/autotests/integration/desktop_window_x11_test.cpp
index ef2b2128ac..dcaa8b558c 100644
--- a/autotests/integration/desktop_window_x11_test.cpp
+++ b/autotests/integration/desktop_window_x11_test.cpp
@@ -46,7 +46,7 @@ void X11DesktopWindowTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/dont_crash_aurorae_destroy_deco.cpp b/autotests/integration/dont_crash_aurorae_destroy_deco.cpp
index 2846972c18..997d52412e 100644
--- a/autotests/integration/dont_crash_aurorae_destroy_deco.cpp
+++ b/autotests/integration/dont_crash_aurorae_destroy_deco.cpp
@@ -46,7 +46,7 @@ void DontCrashAuroraeDestroyDecoTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/dont_crash_cancel_animation.cpp b/autotests/integration/dont_crash_cancel_animation.cpp
index 3d033eda66..9d38f9c42f 100644
--- a/autotests/integration/dont_crash_cancel_animation.cpp
+++ b/autotests/integration/dont_crash_cancel_animation.cpp
@@ -46,7 +46,7 @@ void DontCrashCancelAnimationFromAnimationEndedTest::initTestCase()
     qRegisterMetaType<KWin::Deleted*>();
     qRegisterMetaType<KWin::AbstractClient*>();
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     kwinApp()->start();
     QVERIFY(Compositor::self());
     QSignalSpy compositorToggledSpy(Compositor::self(), &Compositor::compositingToggled);
diff --git a/autotests/integration/dont_crash_cursor_physical_size_empty.cpp b/autotests/integration/dont_crash_cursor_physical_size_empty.cpp
index 56702f1977..4260e6304e 100644
--- a/autotests/integration/dont_crash_cursor_physical_size_empty.cpp
+++ b/autotests/integration/dont_crash_cursor_physical_size_empty.cpp
@@ -58,7 +58,7 @@ void DontCrashCursorPhysicalSizeEmpty::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     if (!QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, QStringLiteral("icons/DMZ-White/index.theme")).isEmpty()) {
         qputenv("XCURSOR_THEME", QByteArrayLiteral("DMZ-White"));
diff --git a/autotests/integration/dont_crash_empty_deco.cpp b/autotests/integration/dont_crash_empty_deco.cpp
index 9f0e354fe1..8e304bd95f 100644
--- a/autotests/integration/dont_crash_empty_deco.cpp
+++ b/autotests/integration/dont_crash_empty_deco.cpp
@@ -42,7 +42,7 @@ void DontCrashEmptyDecorationTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     // this test needs to enforce OpenGL compositing to get into the crashy condition
diff --git a/autotests/integration/dont_crash_glxgears.cpp b/autotests/integration/dont_crash_glxgears.cpp
index d9554d8978..1912781ee7 100644
--- a/autotests/integration/dont_crash_glxgears.cpp
+++ b/autotests/integration/dont_crash_glxgears.cpp
@@ -36,7 +36,7 @@ void DontCrashGlxgearsTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     kwinApp()->start();
     QVERIFY(applicationStartedSpy.wait());
 }
diff --git a/autotests/integration/dont_crash_no_border.cpp b/autotests/integration/dont_crash_no_border.cpp
index 50422f5679..05ee59aa8e 100644
--- a/autotests/integration/dont_crash_no_border.cpp
+++ b/autotests/integration/dont_crash_no_border.cpp
@@ -47,7 +47,7 @@ void DontCrashNoBorder::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/dont_crash_reinitialize_compositor.cpp b/autotests/integration/dont_crash_reinitialize_compositor.cpp
index 7e3c1f8df2..855d3a26e6 100644
--- a/autotests/integration/dont_crash_reinitialize_compositor.cpp
+++ b/autotests/integration/dont_crash_reinitialize_compositor.cpp
@@ -51,7 +51,7 @@ void DontCrashReinitializeCompositorTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/dont_crash_useractions_menu.cpp b/autotests/integration/dont_crash_useractions_menu.cpp
index 02fd14322d..cacdf4e00d 100644
--- a/autotests/integration/dont_crash_useractions_menu.cpp
+++ b/autotests/integration/dont_crash_useractions_menu.cpp
@@ -49,7 +49,7 @@ void TestDontCrashUseractionsMenu::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     // force style to breeze as that's the one which triggered the crash
diff --git a/autotests/integration/effects/desktop_switching_animation_test.cpp b/autotests/integration/effects/desktop_switching_animation_test.cpp
index bf94bdeda1..36b37522cc 100644
--- a/autotests/integration/effects/desktop_switching_animation_test.cpp
+++ b/autotests/integration/effects/desktop_switching_animation_test.cpp
@@ -48,7 +48,7 @@ void DesktopSwitchingAnimationTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     KConfigGroup plugins(config, QStringLiteral("Plugins"));
diff --git a/autotests/integration/effects/maximize_animation_test.cpp b/autotests/integration/effects/maximize_animation_test.cpp
index 0b81e35ae9..3c80f2d732 100644
--- a/autotests/integration/effects/maximize_animation_test.cpp
+++ b/autotests/integration/effects/maximize_animation_test.cpp
@@ -47,7 +47,7 @@ void MaximizeAnimationTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     KConfigGroup plugins(config, QStringLiteral("Plugins"));
diff --git a/autotests/integration/effects/minimize_animation_test.cpp b/autotests/integration/effects/minimize_animation_test.cpp
index 386f1fd3a0..1001cd47f2 100644
--- a/autotests/integration/effects/minimize_animation_test.cpp
+++ b/autotests/integration/effects/minimize_animation_test.cpp
@@ -50,7 +50,7 @@ void MinimizeAnimationTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     KConfigGroup plugins(config, QStringLiteral("Plugins"));
diff --git a/autotests/integration/effects/popup_open_close_animation_test.cpp b/autotests/integration/effects/popup_open_close_animation_test.cpp
index b68ed8b9c7..7e6b3a991c 100644
--- a/autotests/integration/effects/popup_open_close_animation_test.cpp
+++ b/autotests/integration/effects/popup_open_close_animation_test.cpp
@@ -57,7 +57,7 @@ void PopupOpenCloseAnimationTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     KConfigGroup plugins(config, QStringLiteral("Plugins"));
diff --git a/autotests/integration/effects/scripted_effects_test.cpp b/autotests/integration/effects/scripted_effects_test.cpp
index e851500a56..ae2ce67096 100644
--- a/autotests/integration/effects/scripted_effects_test.cpp
+++ b/autotests/integration/effects/scripted_effects_test.cpp
@@ -138,7 +138,7 @@ void ScriptedEffectsTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     ScriptedEffectLoader loader;
 
diff --git a/autotests/integration/effects/slidingpopups_test.cpp b/autotests/integration/effects/slidingpopups_test.cpp
index 5c4125e655..eb7fea3793 100644
--- a/autotests/integration/effects/slidingpopups_test.cpp
+++ b/autotests/integration/effects/slidingpopups_test.cpp
@@ -55,7 +55,7 @@ void SlidingPopupsTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/effects/toplevel_open_close_animation_test.cpp b/autotests/integration/effects/toplevel_open_close_animation_test.cpp
index 54af9f9a59..6e6be2cb2d 100644
--- a/autotests/integration/effects/toplevel_open_close_animation_test.cpp
+++ b/autotests/integration/effects/toplevel_open_close_animation_test.cpp
@@ -51,7 +51,7 @@ void ToplevelOpenCloseAnimationTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     KConfigGroup plugins(config, QStringLiteral("Plugins"));
diff --git a/autotests/integration/effects/translucency_test.cpp b/autotests/integration/effects/translucency_test.cpp
index 70eb09d3ab..8515f07dc1 100644
--- a/autotests/integration/effects/translucency_test.cpp
+++ b/autotests/integration/effects/translucency_test.cpp
@@ -48,7 +48,7 @@ void TranslucencyTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/effects/windowgeometry_test.cpp b/autotests/integration/effects/windowgeometry_test.cpp
index 4a723d48b4..2f16eb0b60 100644
--- a/autotests/integration/effects/windowgeometry_test.cpp
+++ b/autotests/integration/effects/windowgeometry_test.cpp
@@ -44,7 +44,7 @@ void WindowGeometryTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/effects/wobbly_shade_test.cpp b/autotests/integration/effects/wobbly_shade_test.cpp
index d8a346c60d..a9848d9cdd 100644
--- a/autotests/integration/effects/wobbly_shade_test.cpp
+++ b/autotests/integration/effects/wobbly_shade_test.cpp
@@ -48,7 +48,7 @@ void WobblyWindowsShadeTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/generic_scene_opengl_test.cpp b/autotests/integration/generic_scene_opengl_test.cpp
index 763c1ff4c9..5e9dab803f 100644
--- a/autotests/integration/generic_scene_opengl_test.cpp
+++ b/autotests/integration/generic_scene_opengl_test.cpp
@@ -42,7 +42,7 @@ void GenericSceneOpenGLTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/globalshortcuts_test.cpp b/autotests/integration/globalshortcuts_test.cpp
index a4f76d1648..2886de2860 100644
--- a/autotests/integration/globalshortcuts_test.cpp
+++ b/autotests/integration/globalshortcuts_test.cpp
@@ -56,7 +56,7 @@ void GlobalShortcutsTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
     qputenv("KWIN_XKB_DEFAULT_KEYMAP", "1");
diff --git a/autotests/integration/idle_inhibition_test.cpp b/autotests/integration/idle_inhibition_test.cpp
index c341f2e170..28bc559ec1 100644
--- a/autotests/integration/idle_inhibition_test.cpp
+++ b/autotests/integration/idle_inhibition_test.cpp
@@ -47,7 +47,7 @@ void TestIdleInhibition::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/input_stacking_order.cpp b/autotests/integration/input_stacking_order.cpp
index fa4e3d4916..0509ef9780 100644
--- a/autotests/integration/input_stacking_order.cpp
+++ b/autotests/integration/input_stacking_order.cpp
@@ -53,7 +53,7 @@ void InputStackingOrderTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/inputmethod_test.cpp b/autotests/integration/inputmethod_test.cpp
index 7a9901e633..b841331126 100644
--- a/autotests/integration/inputmethod_test.cpp
+++ b/autotests/integration/inputmethod_test.cpp
@@ -64,7 +64,7 @@ void InputMethodTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     static_cast<WaylandTestApplication *>(kwinApp())->setInputMethodServerToStart("internal");
diff --git a/autotests/integration/internal_window.cpp b/autotests/integration/internal_window.cpp
index 51dc797a9f..37ea57c519 100644
--- a/autotests/integration/internal_window.cpp
+++ b/autotests/integration/internal_window.cpp
@@ -177,7 +177,7 @@ void InternalWindowTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
 
diff --git a/autotests/integration/keyboard_layout_test.cpp b/autotests/integration/keyboard_layout_test.cpp
index 3f6ae2f5fc..d49a2d0d68 100644
--- a/autotests/integration/keyboard_layout_test.cpp
+++ b/autotests/integration/keyboard_layout_test.cpp
@@ -131,7 +131,7 @@ void KeyboardLayoutTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
     kwinApp()->setKxkbConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
diff --git a/autotests/integration/keymap_creation_failure_test.cpp b/autotests/integration/keymap_creation_failure_test.cpp
index 9dcfa17ecb..841fd09522 100644
--- a/autotests/integration/keymap_creation_failure_test.cpp
+++ b/autotests/integration/keymap_creation_failure_test.cpp
@@ -50,7 +50,7 @@ void KeymapCreationFailureTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
     kwinApp()->setKxkbConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
diff --git a/autotests/integration/kwinbindings_test.cpp b/autotests/integration/kwinbindings_test.cpp
index 164dc20b2d..b6426b727c 100644
--- a/autotests/integration/kwinbindings_test.cpp
+++ b/autotests/integration/kwinbindings_test.cpp
@@ -50,7 +50,7 @@ void KWinBindingsTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
 
diff --git a/autotests/integration/layershellv1client_test.cpp b/autotests/integration/layershellv1client_test.cpp
index edc8a01d01..5245b0526c 100644
--- a/autotests/integration/layershellv1client_test.cpp
+++ b/autotests/integration/layershellv1client_test.cpp
@@ -56,7 +56,7 @@ void LayerShellV1ClientTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/lockscreen.cpp b/autotests/integration/lockscreen.cpp
index ffec6b476e..3d6f4a97d7 100644
--- a/autotests/integration/lockscreen.cpp
+++ b/autotests/integration/lockscreen.cpp
@@ -175,7 +175,7 @@ void LockScreenTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     qputenv("KWIN_COMPOSE", QByteArrayLiteral("O2"));
diff --git a/autotests/integration/maximize_test.cpp b/autotests/integration/maximize_test.cpp
index 182986d865..16ac9e2623 100644
--- a/autotests/integration/maximize_test.cpp
+++ b/autotests/integration/maximize_test.cpp
@@ -54,7 +54,7 @@ void TestMaximized::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
diff --git a/autotests/integration/modifier_only_shortcut_test.cpp b/autotests/integration/modifier_only_shortcut_test.cpp
index 0a83b4550b..6a7ccfecb1 100644
--- a/autotests/integration/modifier_only_shortcut_test.cpp
+++ b/autotests/integration/modifier_only_shortcut_test.cpp
@@ -82,7 +82,7 @@ void ModifierOnlyShortcutTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
     qputenv("KWIN_XKB_DEFAULT_KEYMAP", "1");
diff --git a/autotests/integration/move_resize_window_test.cpp b/autotests/integration/move_resize_window_test.cpp
index 5d1e0d835c..e9fbef586b 100644
--- a/autotests/integration/move_resize_window_test.cpp
+++ b/autotests/integration/move_resize_window_test.cpp
@@ -84,7 +84,7 @@ void MoveResizeWindowTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     kwinApp()->start();
     QVERIFY(applicationStartedSpy.wait());
     QCOMPARE(screens()->count(), 1);
diff --git a/autotests/integration/nightcolor_test.cpp b/autotests/integration/nightcolor_test.cpp
index 51e267156c..a76c02ced5 100644
--- a/autotests/integration/nightcolor_test.cpp
+++ b/autotests/integration/nightcolor_test.cpp
@@ -39,7 +39,7 @@ void NightColorTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
diff --git a/autotests/integration/no_global_shortcuts_test.cpp b/autotests/integration/no_global_shortcuts_test.cpp
index 4a0f0f1a93..0600ed7b8d 100644
--- a/autotests/integration/no_global_shortcuts_test.cpp
+++ b/autotests/integration/no_global_shortcuts_test.cpp
@@ -92,7 +92,7 @@ void NoGlobalShortcutsTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit(), KWin::WaylandServer::InitializationFlag::NoGlobalShortcuts));
+    QVERIFY(waylandServer()->init(s_socketName, KWin::WaylandServer::InitializationFlag::NoGlobalShortcuts));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
     qputenv("KWIN_XKB_DEFAULT_KEYMAP", "1");
diff --git a/autotests/integration/no_xdg_runtime_dir_test.cpp b/autotests/integration/no_xdg_runtime_dir_test.cpp
index 42524a08e3..057d97ecb0 100644
--- a/autotests/integration/no_xdg_runtime_dir_test.cpp
+++ b/autotests/integration/no_xdg_runtime_dir_test.cpp
@@ -29,7 +29,7 @@ void NoXdgRuntimeDirTest::initTestCase()
 void NoXdgRuntimeDirTest::testInitFails()
 {
     // this test verifies that without an XDG_RUNTIME_DIR the WaylandServer fails to start
-    QVERIFY(!waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(!waylandServer()->init(s_socketName));
 }
 
 WAYLANDTEST_MAIN(NoXdgRuntimeDirTest)
diff --git a/autotests/integration/placement_test.cpp b/autotests/integration/placement_test.cpp
index 20e4c20a13..2d464b00c7 100644
--- a/autotests/integration/placement_test.cpp
+++ b/autotests/integration/placement_test.cpp
@@ -83,7 +83,7 @@ void TestPlacement::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
diff --git a/autotests/integration/plasma_surface_test.cpp b/autotests/integration/plasma_surface_test.cpp
index a075be36c4..b30cd891aa 100644
--- a/autotests/integration/plasma_surface_test.cpp
+++ b/autotests/integration/plasma_surface_test.cpp
@@ -62,7 +62,7 @@ void PlasmaSurfaceTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     kwinApp()->start();
     QVERIFY(applicationStartedSpy.wait());
 }
diff --git a/autotests/integration/plasmawindow_test.cpp b/autotests/integration/plasmawindow_test.cpp
index 5ae5f7ee60..25945f1511 100644
--- a/autotests/integration/plasmawindow_test.cpp
+++ b/autotests/integration/plasmawindow_test.cpp
@@ -60,7 +60,7 @@ void PlasmaWindowTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/platformcursor.cpp b/autotests/integration/platformcursor.cpp
index fe6f30a973..c67ef55286 100644
--- a/autotests/integration/platformcursor.cpp
+++ b/autotests/integration/platformcursor.cpp
@@ -29,7 +29,7 @@ void PlatformCursorTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     kwinApp()->start();
     QVERIFY(applicationStartedSpy.wait());
 }
diff --git a/autotests/integration/pointer_constraints_test.cpp b/autotests/integration/pointer_constraints_test.cpp
index f4a213f9c3..b5f54335ce 100644
--- a/autotests/integration/pointer_constraints_test.cpp
+++ b/autotests/integration/pointer_constraints_test.cpp
@@ -60,7 +60,7 @@ void TestPointerConstraints::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     // set custom config which disables the OnScreenNotification
diff --git a/autotests/integration/pointer_input.cpp b/autotests/integration/pointer_input.cpp
index 9871f8daa1..f85dfe3638 100644
--- a/autotests/integration/pointer_input.cpp
+++ b/autotests/integration/pointer_input.cpp
@@ -140,7 +140,7 @@ void PointerInputTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
diff --git a/autotests/integration/quick_tiling_test.cpp b/autotests/integration/quick_tiling_test.cpp
index b401987765..a1c821b5e2 100644
--- a/autotests/integration/quick_tiling_test.cpp
+++ b/autotests/integration/quick_tiling_test.cpp
@@ -85,7 +85,7 @@ void QuickTilingTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     // set custom config which disables the Outline
diff --git a/autotests/integration/scene_opengl_shadow_test.cpp b/autotests/integration/scene_opengl_shadow_test.cpp
index a35a02f5fd..88c24b254d 100644
--- a/autotests/integration/scene_opengl_shadow_test.cpp
+++ b/autotests/integration/scene_opengl_shadow_test.cpp
@@ -105,7 +105,7 @@ void SceneOpenGLShadowTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/scene_qpainter_shadow_test.cpp b/autotests/integration/scene_qpainter_shadow_test.cpp
index 11ba2fa77f..77e6e98aae 100644
--- a/autotests/integration/scene_qpainter_shadow_test.cpp
+++ b/autotests/integration/scene_qpainter_shadow_test.cpp
@@ -109,7 +109,7 @@ void SceneQPainterShadowTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/scene_qpainter_test.cpp b/autotests/integration/scene_qpainter_test.cpp
index 2d19d63210..1fb654b103 100644
--- a/autotests/integration/scene_qpainter_test.cpp
+++ b/autotests/integration/scene_qpainter_test.cpp
@@ -58,7 +58,7 @@ void SceneQPainterTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // disable all effects - we don't want to have it interact with the rendering
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/screen_changes_test.cpp b/autotests/integration/screen_changes_test.cpp
index e08d004645..04d1b4504b 100644
--- a/autotests/integration/screen_changes_test.cpp
+++ b/autotests/integration/screen_changes_test.cpp
@@ -37,7 +37,7 @@ void ScreenChangesTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->start();
     QVERIFY(applicationStartedSpy.wait());
diff --git a/autotests/integration/screenedge_client_show_test.cpp b/autotests/integration/screenedge_client_show_test.cpp
index 637b63b6fb..eced13e161 100644
--- a/autotests/integration/screenedge_client_show_test.cpp
+++ b/autotests/integration/screenedge_client_show_test.cpp
@@ -44,7 +44,7 @@ void ScreenEdgeClientShowTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     // set custom config which disable touch edge
diff --git a/autotests/integration/scripting/minimizeall_test.cpp b/autotests/integration/scripting/minimizeall_test.cpp
index 110baade78..400ce85fca 100644
--- a/autotests/integration/scripting/minimizeall_test.cpp
+++ b/autotests/integration/scripting/minimizeall_test.cpp
@@ -48,7 +48,7 @@ void MinimizeAllScriptTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/scripting/screenedge_test.cpp b/autotests/integration/scripting/screenedge_test.cpp
index e954438706..56768eca80 100644
--- a/autotests/integration/scripting/screenedge_test.cpp
+++ b/autotests/integration/scripting/screenedge_test.cpp
@@ -51,7 +51,7 @@ void ScreenEdgeTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     // empty config to have defaults
     auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/shade_test.cpp b/autotests/integration/shade_test.cpp
index 9ef9ce25af..45f7c5b1a9 100644
--- a/autotests/integration/shade_test.cpp
+++ b/autotests/integration/shade_test.cpp
@@ -41,7 +41,7 @@ void ShadeTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/showing_desktop_test.cpp b/autotests/integration/showing_desktop_test.cpp
index 62b07ff567..d3137ee7ea 100644
--- a/autotests/integration/showing_desktop_test.cpp
+++ b/autotests/integration/showing_desktop_test.cpp
@@ -38,7 +38,7 @@ void ShowingDesktopTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->start();
     QVERIFY(applicationStartedSpy.wait());
diff --git a/autotests/integration/stacking_order_test.cpp b/autotests/integration/stacking_order_test.cpp
index 4ed392bfab..21ff1a473b 100644
--- a/autotests/integration/stacking_order_test.cpp
+++ b/autotests/integration/stacking_order_test.cpp
@@ -59,7 +59,7 @@ void StackingOrderTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
 
diff --git a/autotests/integration/struts_test.cpp b/autotests/integration/struts_test.cpp
index 43864b7ab4..0394408258 100644
--- a/autotests/integration/struts_test.cpp
+++ b/autotests/integration/struts_test.cpp
@@ -60,7 +60,7 @@ void StrutsTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     // set custom config which disables the Outline
diff --git a/autotests/integration/tabbox_test.cpp b/autotests/integration/tabbox_test.cpp
index 034954f2b4..aed2988519 100644
--- a/autotests/integration/tabbox_test.cpp
+++ b/autotests/integration/tabbox_test.cpp
@@ -45,7 +45,7 @@ void TabBoxTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     KSharedConfigPtr c = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
     c->group("TabBox").writeEntry("ShowTabBox", false);
diff --git a/autotests/integration/touch_input_test.cpp b/autotests/integration/touch_input_test.cpp
index 15a65d7bae..b686d93fd9 100644
--- a/autotests/integration/touch_input_test.cpp
+++ b/autotests/integration/touch_input_test.cpp
@@ -50,7 +50,7 @@ void TouchInputTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/transient_placement.cpp b/autotests/integration/transient_placement.cpp
index 6d407de3b6..84befaca02 100644
--- a/autotests/integration/transient_placement.cpp
+++ b/autotests/integration/transient_placement.cpp
@@ -55,7 +55,7 @@ void TransientPlacementTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/virtual_desktop_test.cpp b/autotests/integration/virtual_desktop_test.cpp
index 5bcff6bfe2..891facc628 100644
--- a/autotests/integration/virtual_desktop_test.cpp
+++ b/autotests/integration/virtual_desktop_test.cpp
@@ -41,7 +41,7 @@ void VirtualDesktopTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
     qputenv("KWIN_XKB_DEFAULT_KEYMAP", "1");
diff --git a/autotests/integration/window_rules_test.cpp b/autotests/integration/window_rules_test.cpp
index 3e50d8d9ab..916b1ecce0 100644
--- a/autotests/integration/window_rules_test.cpp
+++ b/autotests/integration/window_rules_test.cpp
@@ -45,7 +45,7 @@ void WindowRuleTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/window_selection_test.cpp b/autotests/integration/window_selection_test.cpp
index 827390745d..a553e68717 100644
--- a/autotests/integration/window_selection_test.cpp
+++ b/autotests/integration/window_selection_test.cpp
@@ -56,7 +56,7 @@ void TestWindowSelection::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
     qputenv("XKB_DEFAULT_RULES", "evdev");
 
diff --git a/autotests/integration/x11_client_test.cpp b/autotests/integration/x11_client_test.cpp
index 34faf2f01f..b389689603 100644
--- a/autotests/integration/x11_client_test.cpp
+++ b/autotests/integration/x11_client_test.cpp
@@ -60,7 +60,7 @@ void X11ClientTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
 
     kwinApp()->start();
diff --git a/autotests/integration/xdgshellclient_rules_test.cpp b/autotests/integration/xdgshellclient_rules_test.cpp
index be331f5edb..c6e9d5e690 100644
--- a/autotests/integration/xdgshellclient_rules_test.cpp
+++ b/autotests/integration/xdgshellclient_rules_test.cpp
@@ -140,7 +140,7 @@ void TestXdgShellClientRules::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/xdgshellclient_test.cpp b/autotests/integration/xdgshellclient_test.cpp
index 166d01fca0..3ab8428563 100644
--- a/autotests/integration/xdgshellclient_test.cpp
+++ b/autotests/integration/xdgshellclient_test.cpp
@@ -113,7 +113,7 @@ void TestXdgShellClient::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/xwayland_input_test.cpp b/autotests/integration/xwayland_input_test.cpp
index 5eef22185b..eb7f1d51de 100644
--- a/autotests/integration/xwayland_input_test.cpp
+++ b/autotests/integration/xwayland_input_test.cpp
@@ -45,7 +45,7 @@ void XWaylandInputTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/xwayland_selections_test.cpp b/autotests/integration/xwayland_selections_test.cpp
index d4ab6b548b..4b0486dabd 100644
--- a/autotests/integration/xwayland_selections_test.cpp
+++ b/autotests/integration/xwayland_selections_test.cpp
@@ -48,7 +48,7 @@ void XwaylandSelectionsTest::initTestCase()
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
 //    QSignalSpy clipboardSyncDevicedCreated{waylandServer(), &WaylandServer::xclipboardSyncDataDeviceCreated};
 //    QVERIFY(clipboardSyncDevicedCreated.isValid());
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     kwinApp()->start();
diff --git a/autotests/integration/xwaylandserver_crash_test.cpp b/autotests/integration/xwaylandserver_crash_test.cpp
index 77b4160773..0f08ada8ca 100644
--- a/autotests/integration/xwaylandserver_crash_test.cpp
+++ b/autotests/integration/xwaylandserver_crash_test.cpp
@@ -47,7 +47,7 @@ void XwaylandServerCrashTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/autotests/integration/xwaylandserver_restart_test.cpp b/autotests/integration/xwaylandserver_restart_test.cpp
index d197ee5c3f..6c4f85bd41 100644
--- a/autotests/integration/xwaylandserver_restart_test.cpp
+++ b/autotests/integration/xwaylandserver_restart_test.cpp
@@ -44,7 +44,7 @@ void XwaylandServerRestartTest::initTestCase()
     QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
     QVERIFY(applicationStartedSpy.isValid());
     kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
-    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));
+    QVERIFY(waylandServer()->init(s_socketName));
     QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
 
     KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
diff --git a/main_wayland.cpp b/main_wayland.cpp
index 19e2c3d473..873b771d50 100644
--- a/main_wayland.cpp
+++ b/main_wayland.cpp
@@ -676,7 +676,7 @@ int main(int argc, char * argv[])
     if (parser.isSet(noGlobalShortcutsOption)) {
         flags |= KWin::WaylandServer::InitializationFlag::NoGlobalShortcuts;
     }
-    if (!server->init(parser.value(waylandSocketOption).toUtf8(), flags)) {
+    if (!server->init(parser.value(waylandSocketOption), flags)) {
         std::cerr << "FATAL ERROR: could not create Wayland server" << std::endl;
         return 1;
     }
diff --git a/wayland_server.cpp b/wayland_server.cpp
index 3646da80f9..7b79a1c518 100644
--- a/wayland_server.cpp
+++ b/wayland_server.cpp
@@ -327,11 +327,11 @@ bool WaylandServer::start()
     return m_display->start();
 }
 
-bool WaylandServer::init(const QByteArray &socketName, InitializationFlags flags)
+bool WaylandServer::init(const QString &socketName, InitializationFlags flags)
 {
     m_initFlags = flags;
     m_display = new KWinDisplay(this);
-    if (!m_display->addSocketName(QString::fromUtf8(socketName))) {
+    if (!m_display->addSocketName(socketName)) {
         return false;
     }
     m_compositor = m_display->createCompositor(m_display);
diff --git a/wayland_server.h b/wayland_server.h
index 362d33f581..ef9e18b5cd 100644
--- a/wayland_server.h
+++ b/wayland_server.h
@@ -87,7 +87,7 @@ public:
     Q_DECLARE_FLAGS(InitializationFlags, InitializationFlag)
 
     ~WaylandServer() override;
-    bool init(const QByteArray &socketName = QByteArray(), InitializationFlags flags = InitializationFlag::NoOptions);
+    bool init(const QString &socketName = QString(), InitializationFlags flags = InitializationFlag::NoOptions);
     bool start();
     void terminateClientConnections();