diff --git a/jenkins-dendron-haproxy-postgres.sh b/jenkins-dendron-haproxy-postgres.sh
index 2f6544e22c4df5338bc18ee16ee4c1216dd30c38..07979bf8b825e4035c50f3b51e839c9518c3365c 100755
--- a/jenkins-dendron-haproxy-postgres.sh
+++ b/jenkins-dendron-haproxy-postgres.sh
@@ -17,7 +17,7 @@ export HAPROXY_BIN=/home/haproxy/haproxy-1.6.11/haproxy
 ./sytest/jenkins/prep_sytest_for_postgres.sh
 
 ./sytest/jenkins/install_and_run.sh \
-    --python $WORKSPACE/.tox/bin/python \
+    --python $WORKSPACE/.tox/py27/bin/python \
     --synapse-directory $WORKSPACE \
     --dendron $WORKSPACE/dendron/bin/dendron \
     --haproxy \
diff --git a/jenkins-dendron-postgres.sh b/jenkins-dendron-postgres.sh
index bec6a72152c81b74c3f329ad1d8c60480261d08a..3b932fe3402390c7e4c3b7e1e886d521ac7a43ca 100755
--- a/jenkins-dendron-postgres.sh
+++ b/jenkins-dendron-postgres.sh
@@ -15,6 +15,6 @@ export SYNAPSE_CACHE_FACTOR=1
 ./sytest/jenkins/prep_sytest_for_postgres.sh
 
 ./sytest/jenkins/install_and_run.sh \
-    --python $WORKSPACE/.tox/bin/python \
+    --python $WORKSPACE/.tox/py27/bin/python \
     --synapse-directory $WORKSPACE \
     --dendron $WORKSPACE/dendron/bin/dendron \
diff --git a/jenkins-postgres.sh b/jenkins-postgres.sh
index 8b38d7418d07a64fd18c586b8c7b466d06f76e9c..1afb736394e4b0bea7b5a923a571eaa4c0094ba9 100755
--- a/jenkins-postgres.sh
+++ b/jenkins-postgres.sh
@@ -14,5 +14,5 @@ export SYNAPSE_CACHE_FACTOR=1
 ./sytest/jenkins/prep_sytest_for_postgres.sh
 
 ./sytest/jenkins/install_and_run.sh \
-    --python $WORKSPACE/.tox/bin/python \
+    --python $WORKSPACE/.tox/py27/bin/python \
     --synapse-directory $WORKSPACE \
diff --git a/jenkins-sqlite.sh b/jenkins-sqlite.sh
index d20c6da6455d549c280df1342bc134c4ac5b474a..baf4713a01d680ed23e66987d9820653185184f5 100755
--- a/jenkins-sqlite.sh
+++ b/jenkins-sqlite.sh
@@ -12,5 +12,5 @@ export SYNAPSE_CACHE_FACTOR=1
 ./jenkins/clone.sh sytest https://github.com/matrix-org/sytest.git
 
 ./sytest/jenkins/install_and_run.sh \
-    --python $WORKSPACE/.tox/bin/python \
+    --python $WORKSPACE/.tox/py27/bin/python \
     --synapse-directory $WORKSPACE \