Fixed travis build

Author: Sylvain MARIE

setup.py

@@ -15,8 +15,9 @@
                     'scandir;python_version<"3.2"', 'pathlib2;python_version<"3.2"']
 DEPENDENCY_LINKS = []
 SETUP_REQUIRES = ['pytest-runner', 'setuptools_scm']
-TESTS_REQUIRE = ['pytest', 'pytest-logging', 'pytest-cases>=1.10.1',
+TESTS_REQUIRE = ['pytest', 'pytest-logging',
                  'makefun==1.6.8'  # we use that precise version because it does not have the __version__ attribute.
+                 'pytest-cases==1.10.4',  # we use that precise version otherwise there is a conflict with makefun 1.6.8
                  ]
 EXTRAS_REQUIRE = {}