diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f8840c0..6969d9d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,17 +10,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.6", "3.7", "3.8", "3.9"]
+        python: ["3.7", "3.8", "3.9", "3.10"]
         os: [ubuntu-latest, windows-latest]
         include:
-          - python: "3.6"
-            tox_env: "py36"
           - python: "3.7"
             tox_env: "py37"
           - python: "3.8"
             tox_env: "py38"
           - python: "3.9"
             tox_env: "py39"
+          - python: "3.10"
+            tox_env: "py310"
 
     steps:
     - uses: actions/checkout@v1
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 0f88309..6e1eafd 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,9 @@
+3.7.0 (UNRELEASED)
+------------------
+
+* Python 3.10 now officially supported.
+* Dropped support for Python 3.6.
+
 3.6.1 (2021-05-06)
 ------------------
 
diff --git a/HOWTORELEASE.rst b/RELEASING.rst
similarity index 100%
rename from HOWTORELEASE.rst
rename to RELEASING.rst
diff --git a/setup.py b/setup.py
index 96db74f..7de0ab4 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
     package_data={
         "pytest_mock": ["py.typed"],
     },
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     install_requires=["pytest>=5.0"],
     use_scm_version={"write_to": "src/pytest_mock/_version.py"},
     setup_requires=["setuptools_scm"],
@@ -31,10 +31,10 @@
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3 :: Only",
         "Topic :: Software Development :: Testing",
     ],
diff --git a/tests/test_pytest_mock.py b/tests/test_pytest_mock.py
index da20cf6..cca50ad 100644
--- a/tests/test_pytest_mock.py
+++ b/tests/test_pytest_mock.py
@@ -211,7 +211,7 @@ def test_repr_with_no_name(self, mocker: MockerFixture) -> None:
     def test_repr_with_name(self, mocker: MockerFixture) -> None:
         test_name = "funny walk"
         stub = mocker.stub(name=test_name)
-        assert "name={!r}".format(test_name) in repr(stub)
+        assert f"name={test_name!r}" in repr(stub)
 
     def __test_failure_message(self, mocker: MockerFixture, **kwargs: Any) -> None:
         expected_name = kwargs.get("name") or "mock"
@@ -267,19 +267,19 @@ def test_instance_method_spy_exception(
 ) -> None:
     class Foo:
         def bar(self, arg):
-            raise exc_cls("Error with {}".format(arg))
+            raise exc_cls(f"Error with {arg}")
 
     foo = Foo()
     spy = mocker.spy(foo, "bar")
 
     expected_calls = []
     for i, v in enumerate([10, 20]):
-        with pytest.raises(exc_cls, match="Error with {}".format(v)):
+        with pytest.raises(exc_cls, match=f"Error with {v}"):
             foo.bar(arg=v)
 
         expected_calls.append(mocker.call(arg=v))
         assert foo.bar.call_args_list == expected_calls  # type:ignore[attr-defined]
-        assert str(spy.spy_exception) == "Error with {}".format(v)
+        assert str(spy.spy_exception) == f"Error with {v}"
 
 
 def test_instance_method_spy_autospec_true(mocker: MockerFixture) -> None:
@@ -296,7 +296,7 @@ def bar(self, arg):
 
 
 def test_spy_reset(mocker: MockerFixture) -> None:
-    class Foo(object):
+    class Foo:
         def bar(self, x):
             if x == 0:
                 raise ValueError("invalid x")
diff --git a/tox.ini b/tox.ini
index 784f892..2af93bf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.5.3
-envlist = py{35,36,37,38,39}, linting, norewrite
+envlist = py{37,38,39,310}, linting, norewrite
 
 [testenv]
 passenv = USER USERNAME