diff --git a/MANIFEST.in b/MANIFEST.in
index 80361cea..8b367afc 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,4 @@
-include README.md LICENSE.ISC LICENSE.MIT AUTHORS test_httpbin.py
+include README.md LICENSE.ISC LICENSE.MIT AUTHORS tox.ini
+recursive-include tests *.py
 recursive-include httpbin/templates *
 recursive-include httpbin/static *
diff --git a/tox.ini b/tox.ini
index 519d325e..e4825d23 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py38,py39,py310,py311,py312,pypy3
+envlist = py38,py39,py310,py311,py312,py313,py314
 
 [testenv]
 extras = test