diff --git a/tests/auto/wayland/fullscreenshellv1/tst_fullscreenshellv1.cpp b/tests/auto/wayland/fullscreenshellv1/tst_fullscreenshellv1.cpp
index f93d9fbc5d2..55158474c3e 100644
--- a/tests/auto/wayland/fullscreenshellv1/tst_fullscreenshellv1.cpp
+++ b/tests/auto/wayland/fullscreenshellv1/tst_fullscreenshellv1.cpp
@@ -93,7 +93,8 @@ void tst_WaylandClientFullScreenShellV1::createDestroyWindow()
 
 int main(int argc, char **argv)
 {
-    setenv("XDG_RUNTIME_DIR", ".", 1);
+    QTemporaryDir tmpRuntimeDir;
+    setenv("XDG_RUNTIME_DIR", tmpRuntimeDir.path().toLocal8Bit(), 1);
     setenv("QT_QPA_PLATFORM", "wayland", 1); // force QGuiApplication to use wayland plugin
     setenv("QT_WAYLAND_SHELL_INTEGRATION", "fullscreen-shell-v1", 1);
     setenv("QT_WAYLAND_DISABLE_WINDOWDECORATION", "1", 1); // window decorations don't make much sense here
diff --git a/tests/auto/wayland/xdgshellv6/tst_xdgshellv6.cpp b/tests/auto/wayland/xdgshellv6/tst_xdgshellv6.cpp
index a397f60eb4e..9885ee2bc68 100644
--- a/tests/auto/wayland/xdgshellv6/tst_xdgshellv6.cpp
+++ b/tests/auto/wayland/xdgshellv6/tst_xdgshellv6.cpp
@@ -422,7 +422,8 @@ void tst_WaylandClientXdgShellV6::dontSpamExposeEvents()
 
 int main(int argc, char **argv)
 {
-    setenv("XDG_RUNTIME_DIR", ".", 1);
+    QTemporaryDir tmpRuntimeDir;
+    setenv("XDG_RUNTIME_DIR", tmpRuntimeDir.path().toLocal8Bit(), 1);
     setenv("QT_QPA_PLATFORM", "wayland", 1); // force QGuiApplication to use wayland plugin
     setenv("QT_WAYLAND_SHELL_INTEGRATION", "xdg-shell-v6", 1);