diff --git a/tox.ini b/tox.ini
index 3c85f0a..86defe0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,10 +15,6 @@ minversion = 2.0
 usedevelop = True
 extras = test
 deps = pytest
-passenv =
-  LDFLAGS
-  CFLAGS
-  CRYPTOGRAPHY_ALLOW_OPENSSL_102
 commands = py.test []
 
 [testenv:coverage]