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