diff --git a/.zuul.yaml b/.zuul.yaml
index 2dc76ca92..9f58fe055 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -143,6 +143,8 @@
         OVN_L3_CREATE_PUBLIC_NETWORK: true
         OVN_DBS_LOG_LEVEL: dbg
         Q_ML2_PLUGIN_MECHANISM_DRIVERS: ovn,logger
+        # TODO(ueha): Remove this workarround if the Zuul jobs succeed with GROBAL_VENV=true
+        GLOBAL_VENV: false
       test_matrix_configs: [neutron]
       zuul_work_dir: src/opendev.org/openstack/tacker
     host-vars:
@@ -264,6 +266,8 @@
           L2_AGENT_EXTENSIONS: qos
           ENABLE_CHASSIS_AS_GW: false
           Q_ML2_PLUGIN_MECHANISM_DRIVERS: ovn,logger
+          # TODO(ueha): Remove this workarround if the Zuul jobs succeed with GROBAL_VENV=true
+          GLOBAL_VENV: false
         devstack_services:
           # To override the parent job's definitions.
           tls-proxy: false
@@ -530,6 +534,8 @@
           USE_PYTHON3: true
           ENABLE_CHASSIS_AS_GW: false
           Q_ML2_PLUGIN_MECHANISM_DRIVERS: ovn,logger
+          # TODO(ueha): Remove this workarround if the Zuul jobs succeed with GROBAL_VENV=true
+          GLOBAL_VENV: false
         devstack_services:
           dstat: false
           horizon: false
@@ -568,6 +574,8 @@
         OVN_L3_CREATE_PUBLIC_NETWORK: true
         OVN_DBS_LOG_LEVEL: dbg
         Q_ML2_PLUGIN_MECHANISM_DRIVERS: ovn,logger
+        # TODO(ueha): Remove this workarround if the Zuul jobs succeed with GROBAL_VENV=true
+        GLOBAL_VENV: false
       devstack_local_conf:
         post-config:
           $NEUTRON_DHCP_CONF:
diff --git a/tox.ini b/tox.ini
index b05865047..3dc176958 100644
--- a/tox.ini
+++ b/tox.ini
@@ -169,20 +169,22 @@ commands = python ./tools/check_i18n.py ./tacker
 [testenv:docs]
 allowlist_externals =
   sphinx-build
-deps = -r{toxinidir}/doc/requirements.txt
+deps =
+  -r{toxinidir}/doc/requirements.txt
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
 commands =
   sphinx-build -W -b html doc/source doc/build/html
   oslopolicy-sample-generator --config-file=etc/tacker-policy-generator.conf
 
 [testenv:api-ref]
-deps = -r{toxinidir}/doc/requirements.txt
+deps = {[testenv:docs]deps}
 commands =
   rm -rf api-ref/build
   sphinx-build -W -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html
 allowlist_externals = rm
 
 [testenv:releasenotes]
-deps = -r{toxinidir}/doc/requirements.txt
+deps = {[testenv:docs]deps}
 commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html