Being explicit about oldest dependency in tox, numpy has to at max what oldest astropy supports
@@ -29,9 +29,12 @@ description = run tests
deps =
devastropy: git+https://github.com/astropy/astropy.git#egg=astropy
-# TODO: Add more versions to oldestdeps
- oldestdeps: astropy==3.1
+# TODO: Add more versions to oldestdeps. numpy<1.15 could not be installed
+# in CI, a much newer version was pulled in instead, thus setting
+# minimum numpy to 1.15.
+ oldestdeps: astropy==3.1.2
+ oldestdeps: numpy==1.15
cov: codecov
extras =
