diff --git a/lib/sqlalchemy/engine/result.py b/lib/sqlalchemy/engine/result.py
index 74a0fce771..7d1425c283 100644
--- a/lib/sqlalchemy/engine/result.py
+++ b/lib/sqlalchemy/engine/result.py
@@ -712,7 +712,7 @@ class ResultProxy(object):
         while True:
             row = self.fetchone()
             if row is None:
-                raise StopIteration
+                return
             else:
                 yield row
 
diff --git a/lib/sqlalchemy/ext/associationproxy.py b/lib/sqlalchemy/ext/associationproxy.py
index 29064ef27b..31f16287df 100644
--- a/lib/sqlalchemy/ext/associationproxy.py
+++ b/lib/sqlalchemy/ext/associationproxy.py
@@ -603,7 +603,7 @@ class _AssociationList(_AssociationCollection):
 
         for member in self.col:
             yield self._get(member)
-        raise StopIteration
+        return
 
     def append(self, value):
         item = self._create(value)
@@ -907,7 +907,7 @@ class _AssociationSet(_AssociationCollection):
         """
         for member in self.col:
             yield self._get(member)
-        raise StopIteration
+        return
 
     def add(self, value):
         if value not in self: