Run tests with -R on "make test" and the buildbots.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 7ffc3ec..3008d6d 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -764,7 +764,7 @@
TESTOPTS= -l $(EXTRATESTOPTS)
TESTPROG= $(srcdir)/Lib/test/regrtest.py
-TESTPYTHON= $(RUNSHARED) ./$(BUILDPYTHON) -Wd -E -bb $(TESTPYTHONOPTS)
+TESTPYTHON= $(RUNSHARED) ./$(BUILDPYTHON) -Wd -E -R -bb $(TESTPYTHONOPTS)
test: all platform
-find $(srcdir)/Lib -name '*.py[co]' -print | xargs rm -f
-$(TESTPYTHON) $(TESTPROG) $(TESTOPTS)