diff --git a/cassandra/decoder.py b/cassandra/decoder.py
index 1b05c101..ce6fafde 100644
--- a/cassandra/decoder.py
+++ b/cassandra/decoder.py
@@ -787,7 +787,7 @@ def read_binary_longstring(f):
 
 
 def read_longstring(f):
-    return read_binary_longstring().decode('utf8')
+    return read_binary_longstring(f).decode('utf8')
 
 
 def write_longstring(f, s):
diff --git a/tests/unit/test_types.py b/tests/unit/test_types.py
index 25e73ac7..43c16181 100644
--- a/tests/unit/test_types.py
+++ b/tests/unit/test_types.py
@@ -27,7 +27,8 @@ from cassandra.cqltypes import (BooleanType, lookup_casstype_simple, lookup_cass
                                 EmptyValue, _CassandraType, DateType)
 from cassandra.query import named_tuple_factory
 from cassandra.decoder import (write_string, read_longstring, write_stringmap, read_stringmap, read_inet,
-                               write_inet, cql_quote, read_string, write_longstring)
+                               write_inet, read_string, write_longstring)
+from cassandra.encoder import cql_quote
 
 
 class TypeTests(unittest.TestCase):