diff --git a/xs/CMakeLists.txt b/xs/CMakeLists.txt
index b3bda1877..f3afca619 100644
--- a/xs/CMakeLists.txt
+++ b/xs/CMakeLists.txt
@@ -199,5 +199,5 @@ if (MSVC)
 else ()
     set(PERL_PROVE "${PERL_BIN_PATH}/prove")
 endif ()
-add_test (NAME xs COMMAND "${PERL_EXECUTABLE}" ${PERL_PROVE} -I ${PROJECT_SOURCE_DIR}/local-lib/lib/perl5 WORKING_DIRECTORY ${PROJECT_SOURCE_DIR})
+add_test (NAME xs COMMAND "${PERL_EXECUTABLE}" ${PERL_PROVE} -I ${PROJECT_SOURCE_DIR}/../local-lib/lib/perl5 WORKING_DIRECTORY ${PROJECT_SOURCE_DIR})
 add_test (NAME integration COMMAND "${PERL_EXECUTABLE}" ${PERL_PROVE} WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/..)