Merge pull request #90 from scrapinghub/fix-py33-travis-builds

Enforce using pytest<3.3.0 to fix Travis builds

Author: vshlapakov

requirements-test.txt

@@ -1,6 +1,8 @@
 mock
 vcrpy==1.10.3
-pytest
+# FIXME remove the constraint after resolving
+# https://github.com/pytest-dev/pytest/issues/2966
+pytest<3.3.0
 pytest-cov
 pytest-catchlog
 responses==0.5.0