Fix coverage

src/_pytest/compat.py

@@ -350,7 +350,7 @@ class FuncargnamesCompatAttr:
         return self.fixturenames
 
 
-if sys.version_info < (3, 5, 2):
+if sys.version_info < (3, 5, 2):  # pragma: no cover
 
     def overload(f):  # noqa: F811
         return f

testing/python/raises.py

@@ -166,7 +166,7 @@ class TestRaises:
                 # Early versions of Python 3.5 have some bug causing the
                 # __call__ frame to still refer to t even after everything
                 # is done. This makes the test pass for them.
-                if sys.version_info < (3, 5, 2):
+                if sys.version_info < (3, 5, 2):  # pragma: no cover
                     del self
                 raise ValueError