diff --git a/tox.ini b/tox.ini
index 3b4f2e3..33b8fc2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -38,4 +38,4 @@ python =
     3.8: py38
     3.9: py39
     3.10: py310
-    pypy3: pypy3
+    pypy-3: pypy3