diff --git a/.github/workflows/test-only.yml b/.github/workflows/test-only.yml
index a9a6bc58..69e42cba 100644
--- a/.github/workflows/test-only.yml
+++ b/.github/workflows/test-only.yml
@@ -29,7 +29,7 @@ jobs:
     with:
       python-version: '3.11'
       skip-pypuppeteer: true
-      
+
   test-application-3-12:
     needs: lint-code
     uses: ./.github/workflows/test-stack-reusable-workflow.yml
diff --git a/.github/workflows/test-stack-reusable-workflow.yml b/.github/workflows/test-stack-reusable-workflow.yml
index b33e16ec..8dbbb3bb 100644
--- a/.github/workflows/test-stack-reusable-workflow.yml
+++ b/.github/workflows/test-stack-reusable-workflow.yml
@@ -135,7 +135,8 @@ jobs:
       - name: Test SMTP notification mime types
         run: |
           # SMTP content types - needs the 'Debug SMTP server/echo message back server' container from above
-          docker run --rm  --network changedet-network test-changedetectionio bash -c 'cd changedetectionio;pytest tests/smtp/test_notification_smtp.py'
+          # "mailserver" hostname defined above
+          docker run --rm --network changedet-network test-changedetectionio bash -c 'cd changedetectionio;pytest tests/smtp/test_notification_smtp.py'
 
       # @todo Add a test via playwright/puppeteer
       # squid with auth is tested in run_proxy_tests.sh -> tests/proxy_list/test_select_custom_proxy.py
diff --git a/requirements.txt b/requirements.txt
index fbf97021..a13bc8d0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,9 +29,7 @@ chardet>2.3.0
 wtforms~=3.0
 jsonpath-ng~=1.5.3
 
-# Pinned: module 'eventlet.green.select' has no attribute 'epoll'
-# https://github.com/eventlet/eventlet/issues/805#issuecomment-1640463482
-dnspython==2.3.0 # related to eventlet fixes
+dnspython==2.6.1
 
 # jq not available on Windows so must be installed manually