diff --git a/jenkins-postgres.sh b/jenkins-postgres.sh
index 14e60482c..876fabdc7 100755
--- a/jenkins-postgres.sh
+++ b/jenkins-postgres.sh
@@ -46,7 +46,9 @@ git checkout "${GIT_BRANCH}" || (echo >&2 "No ref ${GIT_BRANCH} found, falling b
 ./jenkins/prep_sytest_for_postgres.sh
 
 echo >&2 "Running sytest with PostgreSQL";
-./jenkins/install_and_run.sh --python $TOX_BIN/python --port-base $PORT_BASE
+./jenkins/install_and_run.sh --python $TOX_BIN/python \
+                             --synapse-directory $WORKSPACE \
+                             --port-base $PORT_BASE
 
 cd ..
 cp sytest/.coverage.* .
diff --git a/jenkins-sqlite.sh b/jenkins-sqlite.sh
index 9e474aa9f..ff6664276 100755
--- a/jenkins-sqlite.sh
+++ b/jenkins-sqlite.sh
@@ -40,7 +40,9 @@ cd sytest
 git checkout "${GIT_BRANCH}" || (echo >&2 "No ref ${GIT_BRANCH} found, falling back to develop" ; git checkout develop)
 
 : ${PORT_BASE:=8500}
-./jenkins/install_and_run.sh --python $TOX_BIN/python --port-base $PORT_BASE
+./jenkins/install_and_run.sh --python $TOX_BIN/python \
+                             --synapse-directory $WORKSPACE \
+                             --port-base $PORT_BASE
 
 cd ..
 cp sytest/.coverage.* .