diff --git a/lib/yaml/resolver.py b/lib/yaml/resolver.py
index 528fbc0e..ba9aeab2 100644
--- a/lib/yaml/resolver.py
+++ b/lib/yaml/resolver.py
@@ -146,8 +146,8 @@ def resolve(self, kind, value, implicit):
                 resolvers = self.yaml_implicit_resolvers.get(u'', [])
             else:
                 resolvers = self.yaml_implicit_resolvers.get(value[0], [])
-            resolvers += self.yaml_implicit_resolvers.get(None, [])
-            for tag, regexp in resolvers:
+            wildcard_resolvers = self.yaml_implicit_resolvers.get(None, [])
+            for tag, regexp in resolvers + wildcard_resolvers:
                 if regexp.match(value):
                     return tag
             implicit = implicit[1]
diff --git a/lib3/yaml/resolver.py b/lib3/yaml/resolver.py
index 02b82e73..013896d2 100644
--- a/lib3/yaml/resolver.py
+++ b/lib3/yaml/resolver.py
@@ -146,8 +146,8 @@ def resolve(self, kind, value, implicit):
                 resolvers = self.yaml_implicit_resolvers.get('', [])
             else:
                 resolvers = self.yaml_implicit_resolvers.get(value[0], [])
-            resolvers += self.yaml_implicit_resolvers.get(None, [])
-            for tag, regexp in resolvers:
+            wildcard_resolvers = self.yaml_implicit_resolvers.get(None, [])
+            for tag, regexp in resolvers + wildcard_resolvers:
                 if regexp.match(value):
                     return tag
             implicit = implicit[1]