diff --git a/zuul.d/stable-jobs.yaml b/zuul.d/stable-jobs.yaml
index 759239a..ec95d55 100644
--- a/zuul.d/stable-jobs.yaml
+++ b/zuul.d/stable-jobs.yaml
@@ -4,7 +4,7 @@
     override-checkout: stable/train
     vars:
       devstack_localrc:
-        USE_PYTHON3: False
+        USE_PYTHON3: True
 
 - job:
     name: ironic-standalone-stein
@@ -12,7 +12,7 @@
     override-checkout: stable/stein
     vars:
       devstack_localrc:
-        USE_PYTHON3: False
+        USE_PYTHON3: True
 
 - job:
     name: ironic-tempest-functional-python3-train
@@ -31,7 +31,7 @@
     override-checkout: stable/train
     vars:
       devstack_localrc:
-        USE_PYTHON3: False
+        USE_PYTHON3: True
 
 - job:
     name: ironic-tempest-ipa-wholedisk-direct-tinyipa-multinode-stein
@@ -39,7 +39,7 @@
     override-checkout: stable/stein
     vars:
       devstack_localrc:
-        USE_PYTHON3: False
+        USE_PYTHON3: True
 
 - job:
     name: ironic-inspector-tempest-train
@@ -49,7 +49,7 @@
       devstack_localrc:
         FIXED_NETWORK_SIZE: 4096
         EBTABLES_RACE_FIX: True
-        USE_PYTHON3: False
+        USE_PYTHON3: True
 
 - job:
     name: ironic-inspector-tempest-stein
@@ -59,7 +59,7 @@
       devstack_localrc:
         FIXED_NETWORK_SIZE: 4096
         EBTABLES_RACE_FIX: True
-        USE_PYTHON3: False
+        USE_PYTHON3: True
 
 - job:
     name: ironic-inspector-tempest-discovery-train
@@ -67,7 +67,7 @@
     override-checkout: stable/train
     vars:
       devstack_localrc:
-        USE_PYTHON3: False
+        USE_PYTHON3: True
 
 - job:
     name: ironic-inspector-tempest-discovery-stein
@@ -75,4 +75,4 @@
     override-checkout: stable/stein
     vars:
       devstack_localrc:
-        USE_PYTHON3: False
+        USE_PYTHON3: True