diff --git a/test/runner/lib/cloud/cs.py b/test/runner/lib/cloud/cs.py
index 5f6950b42c..b3a0d9fa96 100644
--- a/test/runner/lib/cloud/cs.py
+++ b/test/runner/lib/cloud/cs.py
@@ -52,7 +52,8 @@ class CsCloudProvider(CloudProvider):
         """
         super(CsCloudProvider, self).__init__(args, config_extension='.ini')
 
-        self.image = 'ansible/ansible:cloudstack-simulator'
+        # The simulator must be pinned to a specific version to guarantee CI passes with the version used.
+        self.image = 'ansible/ansible:cloudstack-simulator@sha256:885aedb7f34ce7114eaa383a2541ede93c4f8cb543c05edf90b694def67b1a6a'
         self.container_name = ''
         self.endpoint = ''
         self.host = ''
diff --git a/test/runner/lib/cloud/vcenter.py b/test/runner/lib/cloud/vcenter.py
index cd312b9859..91a253ca63 100644
--- a/test/runner/lib/cloud/vcenter.py
+++ b/test/runner/lib/cloud/vcenter.py
@@ -39,7 +39,8 @@ class VcenterProvider(CloudProvider):
         """
         super(VcenterProvider, self).__init__(args, config_extension='.ini')
 
-        self.image = 'ansible/ansible:vcenter-simulator'
+        # The simulator must be pinned to a specific version to guarantee CI passes with the version used.
+        self.image = 'ansible/ansible:vcenter-simulator@sha256:1a92e84f477ae4c45f9070a5419a0fc2b46abaecdb5bc396826741bca65ce028'
         self.container_name = ''
 
     def filter(self, targets, exclude):