diff --git a/cmake/podioTest.cmake b/cmake/podioTest.cmake
index 804e0822b..0f2b9c675 100644
--- a/cmake/podioTest.cmake
+++ b/cmake/podioTest.cmake
@@ -7,7 +7,7 @@ function(PODIO_SET_TEST_ENV test)
     LD_LIBRARY_PATH=${PROJECT_BINARY_DIR}/tests:${PROJECT_BINARY_DIR}/src:$<TARGET_FILE_DIR:ROOT::Tree>:$<$<TARGET_EXISTS:SIO::sio>:$<TARGET_FILE_DIR:SIO::sio>>:$ENV{LD_LIBRARY_PATH}
       PYTHONPATH=${PROJECT_SOURCE_DIR}/python:$ENV{PYTHONPATH}
       PODIO_SIOBLOCK_PATH=${PROJECT_BINARY_DIR}/tests
-      ROOT_INCLUDE_PATH=${PROJECT_BINARY_DIR}/tests/datamodel:${PROJECT_SOURCE_DIR}/include
+      ROOT_INCLUDE_PATH=${PROJECT_SOURCE_DIR}/tests:${PROJECT_SOURCE_DIR}/include
       SKIP_SIO_TESTS=$<NOT:$<BOOL:${ENABLE_SIO}>>
       IO_HANDLERS=${IO_HANDLERS}
       PODIO_USE_CLANG_FORMAT=${PODIO_USE_CLANG_FORMAT}