diff --git a/moto/acm/models.py b/moto/acm/models.py
index dc1908d52..470d68227 100644
--- a/moto/acm/models.py
+++ b/moto/acm/models.py
@@ -550,4 +550,4 @@ class AWSCertificateManagerBackend(BaseBackend):
         return certificate, certificate_chain, private_key
 
 
-acm_backends = BackendDict(AWSCertificateManagerBackend, "ec2")
+acm_backends = BackendDict(AWSCertificateManagerBackend, "acm")