+Full verbosity (`make` macro `VERBOSE` or `V`):
+
+ make V=1 test # Unix
+ mms /macro=(V=1) test ! OpenVMS
+ nmake V=1 test # Windows
+
+Verbosity on test failure (`VERBOSE_FAILURE` or `VF´, Unix example shown):
+
+ make test VF=1
+
+Verbosity on failed (sub-)tests only (`VERBOSE_FAILURES_ONLY` or `VFO`):