* implemented changes recommended by nicoddemus

CHANGELOG.rst

@@ -36,8 +36,8 @@
   Thanks `@bagerard`_ for reporting (`#1503`_). Thanks to `@davehunt`_ and
   `@tomviner`_ for PR.
 
-* Whitelisted pytest warnings to show up warnings summary by default. Added a new
-  flag ``--disable-pytest-warnings`` to explicitly disable the warnings summary.
+* Now pytest warnings summary is shown up by default. Added a new flag
+  ``--disable-pytest-warnings`` to explicitly disable the warnings summary.
   This change resolves the (`#1668`_).
 
 * Renamed the pytest ``pdb`` module (plugin) into ``debugging``. 

_pytest/terminal.py

@@ -22,7 +22,7 @@ def pytest_addoption(parser):
     group._addoption('-r',
          action="store", dest="reportchars", default='', metavar="chars",
          help="show extra test summary info as specified by chars (f)ailed, "
-              "(E)error, (s)skipped, (x)failed, (X)passed (w)pytest-warnings "
+              "(E)error, (s)skipped, (x)failed, (X)passed, "
               "(p)passed, (P)passed with output, (a)all except pP. "
               "The pytest warnings are displayed at all times except when "
               "--disable-pytest-warnings is set")

testing/test_config.py

@@ -517,11 +517,11 @@ class TestWarning:
             def test_hello(fix):
                 pass
         """)
-        result = testdir.runpytest()
+        result = testdir.runpytest("--disable-pytest-warnings")
         assert result.parseoutcomes()["pytest-warnings"] > 0
-        assert "hello" in result.stdout.str()
+        assert "hello" not in result.stdout.str()
 
-        result = testdir.runpytest("-rw")
+        result = testdir.runpytest()
         result.stdout.fnmatch_lines("""
             ===*pytest-warning summary*===
             *WT1*test_warn_on_test_item*:5*hello*