diff --git a/autotests/CMakeLists.txt b/autotests/CMakeLists.txt
index d520ec9..c4b7f2e 100644
--- a/autotests/CMakeLists.txt
+++ b/autotests/CMakeLists.txt
@@ -1,56 +1,60 @@
 find_package(Qt5Test ${REQUIRED_QT_VERSION} REQUIRED NO_MODULE)
 set_package_properties(Qt5Test PROPERTIES PURPOSE "Required for tests")
 
 remove_definitions(-DQT_NO_CAST_FROM_ASCII -DQT_STRICT_ITERATORS -DQT_NO_CAST_FROM_BYTEARRAY -DQT_NO_KEYWORDS)
 
 include(ECMMarkAsTest)
 include(ECMAddTests)
 
 configure_file(config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h)
 
 MACRO(PLASMA_UNIT_TESTS)
        FOREACH(_testname ${ARGN})
                ecm_add_test(
                        plasmoidstructure.cpp ${_testname}.cpp ${CMAKE_CURRENT_SOURCE_DIR}/../src/kpackage/private/packages.cpp
                        LINK_LIBRARIES Qt5::Test KF5::Package KF5::Archive KF5::CoreAddons KF5::I18n
                        TEST_NAME ${_testname}
                        NAME_PREFIX "plasma-")
        ENDFOREACH(_testname)
 ENDMACRO(PLASMA_UNIT_TESTS)
 
 PLASMA_UNIT_TESTS(
     fallbackpackagetest
     packagestructuretest
     plasmoidpackagetest
     rccpackagetest
     querytest
 )
 
 set_tests_properties(plasma-querytest PROPERTIES RUN_SERIAL TRUE) # it wipes out ~/.qttest/share
 set_tests_properties(plasma-plasmoidpackagetest PROPERTIES RUN_SERIAL TRUE)
 
 function(kpackagetool5test testname)
     add_test(NAME ${testname}-appstream COMMAND cmake -Dkpackagetool=$<TARGET_FILE:kpackagetool5>
                                                       -Dgenerated=${CMAKE_CURRENT_BINARY_DIR}/${testname}.appdata.xml
                                                       -Dinput=${CMAKE_CURRENT_LIST_DIR}/data/${testname}/
                                                       -Doutput=${CMAKE_CURRENT_SOURCE_DIR}/data/${testname}/${testname}.testappdataxml
                                                       -P ${CMAKE_CURRENT_SOURCE_DIR}/kpackagetoolappstreamtest.cmake
     )
-    set_property(TEST ${testname}-appstream PROPERTY ENVIRONMENT "XDG_DATA_DIRS=${CMAKE_SOURCE_DIR}/src/kpackage/data:$XDG_DATA_DIRS")
+    set(XDG_DATA_DIRS "$ENV{XDG_DATA_DIRS}")
+    if(NOT XDG_DATA_DIRS)
+        set(XDG_DATA_DIRS "/usr/local/share:/usr/share")
+    endif()
+    set_property(TEST ${testname}-appstream PROPERTY ENVIRONMENT "XDG_DATA_DIRS=${CMAKE_SOURCE_DIR}/src/kpackage/data:${XDG_DATA_DIRS}")
 endfunction()
 
 foreach(var "testfallbackpackage" "testpackage" "testpackage-nodisplay" "testjsonmetadatapackage" "testpackagesdep" "testpackagesdepinvalid") # "customcontent" "simplecontent"
     kpackagetool5test(${var})
 endforeach()
 
 file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/testpackage-rcc")
 set(kpkgqrc "${CMAKE_CURRENT_SOURCE_DIR}/data/testpackage-rcc/resources.qrc")
 set(kpkgrcc "${CMAKE_CURRENT_BINARY_DIR}/testpackage-rcc/contents.rcc")
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/data/testpackage-rcc/metadata.json"  ${CMAKE_CURRENT_BINARY_DIR}/testpackage-rcc COPYONLY)
 add_custom_command(OUTPUT ${kpkgrcc}
                     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
         COMMAND Qt5::rcc ${kpkgqrc} --binary -o ${kpkgrcc})
 add_custom_target(testpackage-rcc ALL DEPENDS ${kpkgrcc})
 
 
 add_subdirectory(mockdepresolver)