diff --git a/tests/manual/qdesktopservices/CMakeLists.txt b/tests/manual/qdesktopservices/CMakeLists.txt
index 19e139eb980..b489a05f6cc 100644
--- a/tests/manual/qdesktopservices/CMakeLists.txt
+++ b/tests/manual/qdesktopservices/CMakeLists.txt
@@ -11,7 +11,7 @@ qt_internal_add_manual_test(tst_manual_qdesktopservices
     SOURCES
         tst_qdesktopservices.cpp
     DEFINES
-        SRCDIR=\\\"${CMAKE_CURRENT_SOURCE_DIR}/\\\"
+        SRCDIR="${CMAKE_CURRENT_SOURCE_DIR}/"
     LIBRARIES
         Qt::Gui
         Qt::Test