diff --git a/Formula/c/cmctl.rb b/Formula/c/cmctl.rb
index 4e627437e5542b..5b746732246238 100644
--- a/Formula/c/cmctl.rb
+++ b/Formula/c/cmctl.rb
@@ -1,8 +1,8 @@
 class Cmctl < Formula
   desc "Command-line tool to manage cert-manager"
   homepage "https://cert-manager.io"
-  url "https://github.com/cert-manager/cmctl/archive/refs/tags/v2.0.0.tar.gz"
-  sha256 "fbb3f0a65e01a534e0946cbeb48b7ae8f758d48cca21957b15681b2cdfde0ad6"
+  url "https://github.com/cert-manager/cmctl/archive/refs/tags/v2.1.0.tar.gz"
+  sha256 "f2bf7e2a14c6df8e8e2f0db3cb4f823f6efb4c83830daddc30a04ba84bbec308"
   license "Apache-2.0"
   head "https://github.com/cert-manager/cmctl.git", branch: "main"
 
@@ -39,7 +39,7 @@ def install
     assert_match "cmctl", shell_output("#{bin}/cmctl help")
     # We can't make a Kubernetes cluster in test, so we check that when we use a remote command
     # we find the error about connecting
-    assert_match "error: error finding the scope of the object", shell_output("#{bin}/cmctl check api 2>&1", 129)
+    assert_match "error: error finding the scope of the object", shell_output("#{bin}/cmctl check api 2>&1", 1)
     # The convert command *can* be tested locally.
     (testpath/"cert.yaml").write <<~EOF
       apiVersion: cert-manager.io/v1beta1