diff --git a/resources/test/webapp.yml b/resources/test/webapp.yml
--- a/resources/test/webapp.yml
+++ b/resources/test/webapp.yml
@@ -1,7 +1,7 @@
 storage:
   cls: remote
   args:
-    url: http://localhost:5000/
+    url: http://localhost:5002/
 
 # where to log information
 log_dir: /tmp/swh/web-ui/log
@@ -13,7 +13,7 @@
 host: 127.0.0.1
 
 # its port
-port: 6543
+port: 5004
 
 # Max revisions shown in a log
 max_log_revs: 25
diff --git a/swh/web/ui/main.py b/swh/web/ui/main.py
--- a/swh/web/ui/main.py
+++ b/swh/web/ui/main.py
@@ -28,7 +28,7 @@
     'log_dir': ('string', '/tmp/swh/log'),
     'debug': ('bool', None),
     'host': ('string', '127.0.0.1'),
-    'port': ('int', 6543),
+    'port': ('int', 5004),
     'secret_key': ('string', 'development key'),
     'max_log_revs': ('int', 25),
     'limiter': ('dict', {
@@ -154,7 +154,7 @@
         - 'content_storage_dir' revisions/directories/contents storage on disk
         - 'host'   to override the default 127.0.0.1 to open or not the server
         to the world
-        - 'port'   to override the default of 5000 (from the underlying layer:
+        - 'port'   to override the default of 5004 (from the underlying layer:
         flask)
         - 'debug'  activate the verbose logs
         - 'secret_key' the flask secret key