--- test/run	2021-05-02 20:20:49.000000000 -0400
+++ test/run	2021-05-02 20:22:27.000000000 -0400
@@ -5,7 +5,7 @@
 import subprocess
 from io import open
 
-PYTHON_VERSIONS = ["2", "3"]
+PYTHON_VERSIONS = ["__PYTHON_VERSION__"]
 
 """
 This test uses sys.stdout.