diff --git a/test-requirements.txt b/test-requirements.txt
index 4c8c9619fe..15deb57341 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -25,7 +25,7 @@ oslotest>=1.10.0 # Apache-2.0
 os-testr>=0.7.0 # Apache-2.0
 
 # Optional packages that should be installed when testing
-PyMySQL>=0.6.2 # MIT License
+PyMySQL!=0.7.7,>=0.6.2 # MIT License
 psycopg2>=2.5 # LGPL/ZPL
 pysendfile>=2.0.0 # MIT
 qpid-python;python_version=='2.7' # Apache-2.0