diff --git a/requirements.txt b/requirements.txt
index 93fb9e8..c619191 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 # Python 2->3 compatibility library.
-six>=1.9.0 # MIT
+six>=1.10.0 # MIT
 
 # For pretty formatting machines/state tables...
 PrettyTable<0.8,>=0.7.1 # BSD
diff --git a/test-requirements.txt b/test-requirements.txt
index 413f472..cffddd5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,10 +6,10 @@ hacking<0.11,>=0.10.0
 
 doc8>=0.6.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
-python-subunit>=0.0.18 # Apache-2.0/BSD
+python-subunit>=1.0.0 # Apache-2.0/BSD
 sphinx>=1.6.2 # BSD
 openstackdocstheme>=1.17.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
-testtools>=1.4.0 # MIT
+testtools>=2.2.0 # MIT
 reno>=2.5.0 # Apache-2.0