diff --git a/test-requirements.txt b/test-requirements.txt
index 01bb0e54eb..10ad97a4c5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,10 +10,10 @@ Babel>=1.3,<=1.3
 
 # Needed for testing
 coverage>=3.6,<=3.7.1
-discover
+discover<=0.4.0
 fixtures>=0.3.14,<=1.0.0
 mox>=0.5.3,<=0.5.3
-mock>=1.0
+mock>=1.0,<=1.0.1
 sphinx>=1.1.2,!=1.2.0,<1.3
 requests>=2.1.0,!=2.4.0,<=2.2.1
 testrepository>=0.0.18,<=0.0.20
@@ -22,7 +22,7 @@ psutil>=1.1.1,<2.0.0
 
 # Optional packages that should be installed when testing
 MySQL-python<=1.2.3
-psycopg2
+psycopg2<=2.6
 pysendfile==2.0.0
 qpid-python<=0.26.1
 xattr>=0.4,<=0.6.4