diff --git a/tox.ini b/tox.ini
index 78e50345..0aebdd68 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ deps =
     cov3: coverage<4.0
     cov4: coverage>=4.0,<4.1
     cov41: coverage>=4.1,<5.0
-    cov5: coverage>=5.0
+    cov5: coverage==5.0b1
 commands =
     coverage run --branch --source=coveralls -m pytest tests/
     coverage report -m