diff --git a/INSTALL b/INSTALL
index 94156ec744a40f4f6523ef70495a538021291c15..85916ac537f7ea5d53c82fe32cddf653f5f6076f 100644
--- a/INSTALL
+++ b/INSTALL
@@ -53,7 +53,7 @@ For Debian/Ubuntu (likely incomplete list, but goes a long way):
 	apt-get install libpng12-dev                         # or latest version; for AOFlagger
 	apt-get install libreadline-dev libpqxx-dev doxygen python-coverage  # optional
 	apt-get install libunittest++-dev                    # optional, for tests that use UnitTest++
-	apt-get install python-pygresql python-psycopg2 python-mysql.connector  # optional, for some SAS/ tests
+	apt-get install python-pygresql python-psycopg2 python-mysql.connector python-mock  # optional, for some SAS/ tests
 	apt-get install postgresql                           # optional, for some SAS/OTDB_Services/ tests
 
 
@@ -62,7 +62,7 @@ For CentOS/Fedora (likely incomplete list, but goes a long way):
 	yum install subversion cmake make gcc python-devel numpy
 	yum install boost-devel fftw-devel cfitsio-devel libxml2-devel libpng-devel
 	yum install readline-devel libpqxx-devel doxygen python-coverage  # optional
-	yum install PyGreSQL python-psycopg2 mysql-connector-python  # optional, for some SAS/ tests
+	yum install PyGreSQL python-psycopg2 mysql-connector-python python2-mock  # optional, for some SAS/ tests
 	yum install postgresql                               # optional, for some SAS/OTDB_Services/ tests
 
 	The blitz and blitz-devel pkgs are available on some distros, but not on e.g. CentOS 7.