diff --git a/README.rst b/README.rst
index e69b64135..17aa656d3 100644
--- a/README.rst
+++ b/README.rst
@@ -103,8 +103,8 @@ requirements installed, and you can simply run the test suite:
 Please ensure that all patches are accompanied by matching changes in the test
 suite. The project tries to maintain 100% test coverage.
 
-You can also use `tox` to run a full suite of tests in Python 2.7 and 3.5,
-including a quick test to check documentation and code linting.
+You can also use `tox` to run the full suite of tests, including a quick test
+to check documentation and code linting.
 
 The following tox environments are relevant for local testing:
 
@@ -114,9 +114,6 @@ The following tox environments are relevant for local testing:
     tox -e docs  # runs a does-it-compile check on the documentation
     tox -e lint  # runs the linter for coding style checks
 
-We support Python 2.7 and 3.5, so please make sure all tests pass in both
-environments. Running `tox` ensures all necessary tests are executed.
-
 
 Documentation
 -------------
diff --git a/setup.py b/setup.py
index 0d4b79107..9d85e545a 100644
--- a/setup.py
+++ b/setup.py
@@ -31,6 +31,7 @@ setup(
         "Operating System :: Microsoft :: Windows",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",