Require pickle5 for CI testing

jakirkham · jakirkham · commit e98d98edfacb · 2020-05-10T20:54:17.000-07:00
diff --git a/dev-requirements.txt b/dev-requirements.txt
@@ -3,6 +3,8 @@ flake8
 pytest
 pytest-cov
 psutil
+# To test on older Python versions
+pickle5; python_version <= '3.7'
 # To be able to test tornado coroutines
 tornado
 # To be able to test numpy specific things
