diff --git a/changelog.d/4839.misc b/changelog.d/4839.misc
new file mode 100644
index 000000000..7c6868051
--- /dev/null
+++ b/changelog.d/4839.misc
@@ -0,0 +1 @@
+Disable captcha registration by default in unit tests.
\ No newline at end of file
diff --git a/tests/utils.py b/tests/utils.py
index e4c42f9fa..9c8dc9dbc 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -115,6 +115,7 @@ def default_config(name):
     config.signing_key = [MockKey()]
     config.event_cache_size = 1
     config.enable_registration = True
+    config.enable_registration_captcha = False
     config.macaroon_secret_key = "not even a little secret"
     config.expire_access_token = False
     config.server_name = name