diff --git a/recipes-qt/qt6/qt6-ptest.inc b/recipes-qt/qt6/qt6-ptest.inc
index 0aa1288..0395472 100644
--- a/recipes-qt/qt6/qt6-ptest.inc
+++ b/recipes-qt/qt6/qt6-ptest.inc
@@ -7,6 +7,11 @@ QT_PTEST_ENABLED ?= "${@bb.utils.contains('DISTRO_FEATURES', 'ptest', '1', '0',
 PTEST_ENABLED = "${QT_PTEST_ENABLED}"
 
 fakeroot do_install_ptest() {
+    cat >${WORKDIR}/toolchain-ptest.cmake <<EOF
+include(${WORKDIR}/toolchain.cmake)
+list(PREPEND CMAKE_FIND_ROOT_PATH ${D})
+EOF
+
     if [ -n "${OE_QMAKE_QMAKE}" ]; then
         # qmake project
         B_PTEST=${B}
@@ -21,13 +26,13 @@ fakeroot do_install_ptest() {
         cd ${B_PTEST}
         cmake \
             ${OECMAKE_GENERATOR_ARGS} \
-            -DCMAKE_TOOLCHAIN_FILE=${WORKDIR}/toolchain.cmake \
+            -DCMAKE_TOOLCHAIN_FILE=${WORKDIR}/toolchain-ptest.cmake \
             -DPython3_EXECUTABLE=${PYTHON} \
             ${EXTRA_OECMAKE} \
             -DQT_BUILD_STANDALONE_TESTS=ON \
-            -DQT_ADDITIONAL_PACKAGES_PREFIX_PATH="${D}${QT6_INSTALL_LIBDIR}/cmake;${RECIPE_SYSROOT}/${QT6_INSTALL_LIBDIR}/cmake" \
             -DCMAKE_STAGING_PREFIX=${D}${prefix} \
             -DCMAKE_SKIP_RPATH=ON \
+            -DQT_DISABLE_NO_DEFAULT_PATH_IN_QT_PACKAGES=ON \
             ${S} \
             -Wno-dev
         ${CMAKE_VERBOSE} cmake --build ${B_PTEST} --target all