diff --git a/packages/misskey-js/etc/misskey-js.api.md b/packages/misskey-js/etc/misskey-js.api.md
index 01a3dbbb30..91d8bd7070 100644
--- a/packages/misskey-js/etc/misskey-js.api.md
+++ b/packages/misskey-js/etc/misskey-js.api.md
@@ -3078,6 +3078,7 @@ type SigninFlowRequest = {
     'g-recaptcha-response'?: string | null;
     'turnstile-response'?: string | null;
     'm-captcha-response'?: string | null;
+    'testcaptcha-response'?: string | null;
 };
 
 // @public (undocumented)
@@ -3135,6 +3136,7 @@ type SignupRequest = {
     'g-recaptcha-response'?: string | null;
     'turnstile-response'?: string | null;
     'm-captcha-response'?: string | null;
+    'testcaptcha-response'?: string | null;
 };
 
 // @public (undocumented)
diff --git a/packages/misskey-js/src/entities.ts b/packages/misskey-js/src/entities.ts
index dd88791ed0..f7f13222f3 100644
--- a/packages/misskey-js/src/entities.ts
+++ b/packages/misskey-js/src/entities.ts
@@ -258,6 +258,7 @@ export type SignupRequest = {
 	'g-recaptcha-response'?: string | null;
 	'turnstile-response'?: string | null;
 	'm-captcha-response'?: string | null;
+	'testcaptcha-response'?: string | null;
 }
 
 export type SignupResponse = MeDetailed & {
@@ -282,6 +283,7 @@ export type SigninFlowRequest = {
 	'g-recaptcha-response'?: string | null;
 	'turnstile-response'?: string | null;
 	'm-captcha-response'?: string | null;
+	'testcaptcha-response'?: string | null;
 };
 
 export type SigninFlowResponse = {