+PYTHON=python
+
+# The tests output TAP (Test Anything Proocol)
+# If you have either of these TAP viwers installed,
+# S good ing will happen.
+TAPVIEWER=cat
+ifeq (,$(command -v tapview))
+ TAPVIEWER=tapview
+else
+ ifeq (,$(command -v tappy))
+ TAPVIEWER=tappy
+ endif
+endif
+
+all:
+ @echo "With Python 2:"
+ @$(MAKE) -e PYTHON=python2 regress | $(TAPVIEWER)
+ @echo "With Python 3:"
+ @$(MAKE) -e PYTHON=python3 regress | $(TAPVIEWER)