diff --git a/tox.ini b/tox.ini
index f10df6f6f..b44d30449 100644
--- a/tox.ini
+++ b/tox.ini
@@ -69,6 +69,13 @@ commands =
 setenv =
     PYTHONHASHSEED = 0
 
+[testenv:py37]
+commands =
+    {[base]install_and_test} {[base]python37_compatible_packages}
+    python tests/lock_test.py
+setenv =
+    {[testenv]setenv}
+
 [testenv:py27-oldest]
 commands =
     {[testenv]commands}