+ifeq ($V,)
+ @echo 'Use "$(MAKE) V=1" to see the details for passing and known broken tests.'
+ @env NOTMUCH_TEST_QUIET=1 $(NOTMUCH_SRCDIR)/$(test_src_dir)/notmuch-test $(OPTIONS)
+else
+# The user has explicitly enabled quiet execution.
+ifeq ($V,0)
+ @env NOTMUCH_TEST_QUIET=1 $(NOTMUCH_SRCDIR)/$(test_src_dir)/notmuch-test $(OPTIONS)
+else
+ @$(NOTMUCH_SRCDIR)/$(test_src_dir)/notmuch-test $(OPTIONS)
+endif
+endif