diff --git a/releng/README.releng b/releng/README.releng
index 9a0c47f7..f78f909f 100644
--- a/releng/README.releng
+++ b/releng/README.releng
@@ -22,6 +22,10 @@ Release Engineering Che[at|ck] List
  + exit code 0 on success, non-zero on failure
  + use different exit codes for any failure (10, 20, ... 100)
 
+* RUNNING TESTS
+ + All tests have to be run from the releng/ directory, within
+   libisoburn source tree.
+
 * TESTS LIST
 
  TEST: releng_build_os