diff --git a/doc/en/example/parametrize.rst b/doc/en/example/parametrize.rst
index ac9f81a38..b707aeac4 100644
--- a/doc/en/example/parametrize.rst
+++ b/doc/en/example/parametrize.rst
@@ -190,13 +190,13 @@ only have to work a bit to construct the correct arguments for pytest's
             idlist.append(scenario[0])
             items = scenario[1].items()
             argnames = [x[0] for x in items]
-            argvalues.append(([x[1] for x in items]))
+            argvalues.append([x[1] for x in items])
         metafunc.parametrize(argnames, argvalues, ids=idlist, scope="class")
 
     scenario1 = ('basic', {'attribute': 'value'})
     scenario2 = ('advanced', {'attribute': 'value2'})
 
-    class TestSampleWithScenarios(object):
+    class TestSampleWithScenarios:
         scenarios = [scenario1, scenario2]
 
         def test_demo1(self, attribute):
@@ -277,9 +277,9 @@ creates a database object for the actual test invocations::
         if 'db' in metafunc.fixturenames:
             metafunc.parametrize("db", ['d1', 'd2'], indirect=True)
 
-    class DB1(object):
+    class DB1:
         "one database object"
-    class DB2(object):
+    class DB2:
         "alternative database object"
 
     @pytest.fixture
@@ -398,7 +398,7 @@ parametrizer`_ but in a lot less code::
         metafunc.parametrize(argnames, [[funcargs[name] for name in argnames]
                 for funcargs in funcarglist])
 
-    class TestClass(object):
+    class TestClass:
         # a map specifying multiple argument sets for a test method
         params = {
             'test_equals': [dict(a=1, b=2), dict(a=3, b=3), ],
diff --git a/doc/en/example/pythoncollection.rst b/doc/en/example/pythoncollection.rst
index 86b7fe566..89619bca3 100644
--- a/doc/en/example/pythoncollection.rst
+++ b/doc/en/example/pythoncollection.rst
@@ -136,7 +136,7 @@ that match ``*_check``. For example, if we have::
 .. code-block:: python
 
     # content of check_myapp.py
-    class CheckMyApp(object):
+    class CheckMyApp:
         def simple_check(self):
             pass
         def complex_check(self):
diff --git a/doc/en/example/special.rst b/doc/en/example/special.rst
index c8fc96786..bc65f4d48 100644
--- a/doc/en/example/special.rst
+++ b/doc/en/example/special.rst
@@ -16,7 +16,7 @@ calls it::
     @pytest.fixture(scope="session", autouse=True)
     def callattr_ahead_of_alltests(request):
         print("callattr_ahead_of_alltests called")
-        seen = set([None])
+        seen = {None}
         session = request.node
         for item in session.items:
             cls = item.getparent(pytest.Class)
@@ -32,7 +32,7 @@ will be called ahead of running any tests::
 
     # content of test_module.py
 
-    class TestHello(object):
+    class TestHello:
         @classmethod
         def callme(cls):
             print("callme called!")
@@ -43,7 +43,7 @@ will be called ahead of running any tests::
         def test_method2(self):
             print("test_method1 called")
 
-    class TestOther(object):
+    class TestOther:
         @classmethod
         def callme(cls):
             print("callme other called")
diff --git a/doc/en/fixture.rst b/doc/en/fixture.rst
index 9ba2552ba..8957c48bb 100644
--- a/doc/en/fixture.rst
+++ b/doc/en/fixture.rst
@@ -496,7 +496,7 @@ read an optional server URL from the test module which uses our fixture::
         server = getattr(request.module, "smtpserver", "smtp.gmail.com")
         smtp_connection = smtplib.SMTP(server, 587, timeout=5)
         yield smtp_connection
-        print("finalizing %s (%s)" % (smtp_connection, server))
+        print("finalizing {} ({})".format(smtp_connection, server))
         smtp_connection.close()
 
 We use the ``request.module`` attribute to optionally obtain an
@@ -820,7 +820,7 @@ and instantiate an object ``app`` where we stick the already defined
 
     import pytest
 
-    class App(object):
+    class App:
         def __init__(self, smtp_connection):
             self.smtp_connection = smtp_connection
 
@@ -902,7 +902,7 @@ to show the setup/teardown flow::
     def test_1(modarg):
         print("  RUN test1 with modarg %s" % modarg)
     def test_2(otherarg, modarg):
-        print("  RUN test2 with otherarg %s and modarg %s" % (otherarg, modarg))
+        print("  RUN test2 with otherarg {} and modarg {}".format(otherarg, modarg))
 
 
 Let's run the tests in verbose mode and with looking at the print-output:
@@ -1001,7 +1001,7 @@ and declare its use in a test module via a ``usefixtures`` marker::
     import pytest
 
     @pytest.mark.usefixtures("cleandir")
-    class TestDirectoryInit(object):
+    class TestDirectoryInit:
         def test_cwd_starts_empty(self):
             assert os.listdir(os.getcwd()) == []
             with open("myfile", "w") as f:
@@ -1086,7 +1086,7 @@ self-contained implementation of this idea::
 
     import pytest
 
-    class DB(object):
+    class DB:
         def __init__(self):
             self.intransaction = []
         def begin(self, name):
@@ -1098,7 +1098,7 @@ self-contained implementation of this idea::
     def db():
         return DB()
 
-    class TestClass(object):
+    class TestClass:
         @pytest.fixture(autouse=True)
         def transact(self, request, db):
             db.begin(request.function.__name__)
@@ -1162,7 +1162,7 @@ and then e.g. have a TestClass using it by declaring the need::
 .. code-block:: python
 
     @pytest.mark.usefixtures("transact")
-    class TestClass(object):
+    class TestClass:
         def test_method1(self):
             ...
 
diff --git a/doc/en/funcarg_compare.rst b/doc/en/funcarg_compare.rst
index c9939d70f..131ceb1ae 100644
--- a/doc/en/funcarg_compare.rst
+++ b/doc/en/funcarg_compare.rst
@@ -26,7 +26,7 @@ a per-session Database object::
 .. code-block:: python
 
     # content of conftest.py
-    class Database(object):
+    class Database:
         def __init__(self):
             print("database instance created")
         def destroy(self):
diff --git a/doc/en/getting-started.rst b/doc/en/getting-started.rst
index 124c1e686..b2d597e1e 100644
--- a/doc/en/getting-started.rst
+++ b/doc/en/getting-started.rst
@@ -114,7 +114,7 @@ Once you develop multiple tests, you may want to group them into a class. pytest
 .. code-block:: python
 
     # content of test_class.py
-    class TestClass(object):
+    class TestClass:
         def test_one(self):
             x = "this"
             assert 'h' in x
diff --git a/doc/en/unittest.rst b/doc/en/unittest.rst
index 9b3d9bd60..e8063c173 100644
--- a/doc/en/unittest.rst
+++ b/doc/en/unittest.rst
@@ -93,7 +93,7 @@ it from a unittest-style test::
 
     @pytest.fixture(scope="class")
     def db_class(request):
-        class DummyDB(object):
+        class DummyDB:
             pass
         # set a class attribute on the invoking test context
         request.cls.db = DummyDB()
diff --git a/doc/en/usage.rst b/doc/en/usage.rst
index f29e018a1..ef6d2712e 100644
--- a/doc/en/usage.rst
+++ b/doc/en/usage.rst
@@ -774,7 +774,7 @@ You can specify additional plugins to ``pytest.main``::
 
     # content of myinvoke.py
     import pytest
-    class MyPlugin(object):
+    class MyPlugin:
         def pytest_sessionfinish(self):
             print("*** test run reporting finishing")