Merge pull request pandas-dev#684 from manahl/pytest-cov

Unpin pytest-cov

Author: shashank88

setup.py

@@ -90,10 +90,11 @@ def run_tests(self):
                       "tzlocal",
                       "lz4"
                      ],
+    # Note: pytest >= 4.1.0 is not compatible with pytest-cov < 2.6.1.
     tests_require=["mock",
                    "mockextras",
                    "pytest",
-                   "pytest-cov>=2.6.1",
+                   "pytest-cov",
                    "pytest-server-fixtures",
                    "pytest-timeout",
                    "pytest-xdist",