diff --git a/deltachat-ffi/deltachat.h b/deltachat-ffi/deltachat.h
index 0666149cd..1ab070ce5 100644
--- a/deltachat-ffi/deltachat.h
+++ b/deltachat-ffi/deltachat.h
@@ -406,7 +406,6 @@ char*           dc_get_blobdir               (const dc_context_t* context);
  * - `proxy_enabled` = Proxy enabled. Disabled by default.
  * - `proxy_url` = Proxy URL. May contain multiple URLs separated by newline, but only the first one is used.
  * - `imap_certificate_checks` = how to check IMAP certificates, one of the @ref DC_CERTCK flags, defaults to #DC_CERTCK_AUTO (0)
- * - `smtp_certificate_checks` = deprecated option, should be set to the same value as `imap_certificate_checks` but ignored by the new core
  * - `displayname`  = Own name to use when sending messages. MUAs are allowed to spread this way e.g. using CC, defaults to empty
  * - `selfstatus`   = Own status to display, e.g. in e-mail footers, defaults to empty
  * - `selfavatar`   = File containing avatar. Will immediately be copied to the 
@@ -5802,7 +5801,7 @@ int64_t         dc_lot_get_timestamp     (const dc_lot_t* lot);
  * These constants configure TLS certificate checks for IMAP and SMTP connections.
  *
  * These constants are set via dc_set_config()
- * using keys "imap_certificate_checks" and "smtp_certificate_checks".
+ * using the key "imap_certificate_checks".
  *
  * @addtogroup DC_CERTCK
  * @{
diff --git a/python/src/deltachat/testplugin.py b/python/src/deltachat/testplugin.py
index aecd333ff..e2010d44a 100644
--- a/python/src/deltachat/testplugin.py
+++ b/python/src/deltachat/testplugin.py
@@ -427,7 +427,6 @@ class ACFactory:
         if self.pytestconfig.getoption("--strict-tls"):
             # Enable strict certificate checks for online accounts
             configdict["imap_certificate_checks"] = str(const.DC_CERTCK_STRICT)
-            configdict["smtp_certificate_checks"] = str(const.DC_CERTCK_STRICT)
 
         assert "addr" in configdict and "mail_pw" in configdict
         return configdict
@@ -499,7 +498,6 @@ class ACFactory:
                 "addr": cloned_from.get_config("addr"),
                 "mail_pw": cloned_from.get_config("mail_pw"),
                 "imap_certificate_checks": cloned_from.get_config("imap_certificate_checks"),
-                "smtp_certificate_checks": cloned_from.get_config("smtp_certificate_checks"),
             }
         configdict.update(kwargs)
         ac = self._get_cached_account(addr=configdict["addr"]) if cache else None