diff --git a/tox.ini b/tox.ini
index c5c086162..467a00400 100644
--- a/tox.ini
+++ b/tox.ini
@@ -221,7 +221,7 @@ commands =
         --cov=acme --cov=certbot --cov=certbot_dns_rfc2136 --cov-report= \
         --cov-config=certbot-ci/certbot_integration_tests/.coveragerc
     coverage report --include 'certbot/*' --show-missing --fail-under=45
-    coverage report --include 'certbot-dns-rfc2136/*' --show-missing --fail-under=87
+    coverage report --include 'certbot-dns-rfc2136/*' --show-missing --fail-under=86
 
 [testenv:integration-external]
 # Run integration tests with Certbot outside of tox's virtual environment.