diff --git a/test/run_generator_tests.sh b/test/run_generator_tests.sh
index 79addd3ea..f6f6761c2 100755
--- a/test/run_generator_tests.sh
+++ b/test/run_generator_tests.sh
@@ -152,6 +152,8 @@ add_ini_files_from_macros()
     # given a list of macros, collect all INI files which contain at least one of them
     local macro_files=$@
     for mf in ${macro_files} ; do
+        # if any, strip the leading O2DPG_ROOT path to only grep for the relative trailing path
+        mf=${mf##${O2DPG_ROOT}/}
         local other_ini_files=$(grep -r -l ${mf} | grep ".ini$")
         # so this macro is not included in any of the INI file,
         # maybe it is included by another macro which is then included in an INI file