diff --git a/tests/components/esp32/dummy_signing_key_v1_ecdsa.pem b/tests/components/esp32/dummy_signing_key_v1_ecdsa.pem
index bd092056069..eb27f9b2c48 100644
--- a/tests/components/esp32/dummy_signing_key_v1_ecdsa.pem
+++ b/tests/components/esp32/dummy_signing_key_v1_ecdsa.pem
@@ -4,4 +4,3 @@ MHcCAQEEIEZIp96p7Z7QN6vxOFE5FdRNm535vW81Ax07KnGxVjiMoAoGCCqGSM49
 AwEHoUQDQgAEK+fBQDn1Q+r5lGwcDoMUgeg2Aq16LLrLUz7xWI6mS0PUClzolDIo
 eaV/Pfjl7zAvkbQQsZq3rTNnr1eGAk5P+A==
 -----END EC PRIVATE KEY-----
-*** DO NOT USE THIS KEY...EVER ***