diff --git a/.zuul.yaml b/.zuul.yaml
index bf48b30b..48198469 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -167,8 +167,7 @@
     # OpenStack SDK 1.*.* has not been released to PyPI yet
     voting: false
     vars:
-      # Uncomment once OpenStack SDK 1.*.* has been released to PyPI
-      # tox_constraints_file: '{{ ansible_user_dir }}/{{ zuul.project.src_dir }}/tests/constraints-openstacksdk-1.x.x.txt'
+      tox_constraints_file: '{{ ansible_user_dir }}/{{ zuul.project.src_dir }}/tests/constraints-openstacksdk-1.x.x.txt'
       # TODO: Remove tox_extra_args once all ci roles pass
       tox_extra_args: *skip_broken_ci_roles
       tox_install_siblings: false
diff --git a/tests/constraints-openstacksdk-0.x.x.txt b/tests/constraints-openstacksdk-0.x.x.txt
index 4bd96357..d5bbddf9 100644
--- a/tests/constraints-openstacksdk-0.x.x.txt
+++ b/tests/constraints-openstacksdk-0.x.x.txt
@@ -1 +1,2 @@
-openstacksdk<1.0.0
+# 0.99.x are release candidates for the first major release of OpenStackSDK 1.x.x
+openstacksdk<0.99.0
diff --git a/tests/constraints-openstacksdk-1.x.x.txt b/tests/constraints-openstacksdk-1.x.x.txt
index 3d959de5..7610c454 100644
--- a/tests/constraints-openstacksdk-1.x.x.txt
+++ b/tests/constraints-openstacksdk-1.x.x.txt
@@ -1 +1,2 @@
-openstacksdk>=1.0.0
+# 0.99.x are release candidates for the first major release of OpenStackSDK 1.x.x
+openstacksdk>=0.99.0