diff --git a/tests/conftest.py b/tests/conftest.py
index 1ee2a99..6ba8ae0 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -17,10 +17,9 @@
 
 from cryptography.hazmat.backends import _available_backends
 from cryptography.hazmat.backends.interfaces import (
-    CipherBackend, DSABackend, HMACBackend, HashBackend, PBKDF2HMACBackend,
-    RSABackend
+    CipherBackend, CMACBackend, DSABackend, HMACBackend, HashBackend,
+    PBKDF2HMACBackend, RSABackend
 )
-
 from .utils import check_backend_support, check_for_iface, select_backends
 
 
@@ -36,6 +35,7 @@
 def pytest_runtest_setup(item):
     check_for_iface("hmac", HMACBackend, item)
     check_for_iface("cipher", CipherBackend, item)
+    check_for_iface("cmac", CMACBackend, item)
     check_for_iface("hash", HashBackend, item)
     check_for_iface("pbkdf2hmac", PBKDF2HMACBackend, item)
     check_for_iface("dsa", DSABackend, item)