diff --git a/moto/s3/urls.py b/moto/s3/urls.py
index 6d9ff514e..9e6dba10a 100644
--- a/moto/s3/urls.py
+++ b/moto/s3/urls.py
@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-from moto.compat import OrderedDict
 from .responses import S3ResponseInstance
 
 url_bases = [
@@ -8,13 +7,13 @@ url_bases = [
     "https?://(?P<bucket_name>[a-zA-Z0-9\-_.]*)\.?s3(.*).amazonaws.com"
 ]
 
-url_paths = OrderedDict([
+url_paths = {
     # subdomain bucket
-    ('{0}/$', S3ResponseInstance.bucket_response),
+    '{0}/$': S3ResponseInstance.bucket_response,
 
     # subdomain key of path-based bucket
-    ('{0}/(?P<key_or_bucket_name>.+)', S3ResponseInstance.ambiguous_response),
+    '{0}/(?P<key_or_bucket_name>[^/]+)/?$': S3ResponseInstance.ambiguous_response,
 
     # path-based bucket + key
-    ('{0}/(?P<bucket_name_path>[a-zA-Z0-9\-_./]+)/(?P<key_name>.+)', S3ResponseInstance.key_response),
-])
+    '{0}/(?P<bucket_name_path>[a-zA-Z0-9\-_./]+)/(?P<key_name>.+)': S3ResponseInstance.key_response,
+}