diff --git a/library/utilities/accelerate b/library/utilities/accelerate
index aa4ab32ea9..371e4adb92 100644
--- a/library/utilities/accelerate
+++ b/library/utilities/accelerate
@@ -347,7 +347,8 @@ def main():
             port=dict(required=False, default=5099),
             password=dict(required=True),
             minutes=dict(required=False, default=30),
-        )
+        ),
+        supports_check_mode=True
     )
 
     password  = base64.b64decode(module.params['password'])
diff --git a/library/utilities/fireball b/library/utilities/fireball
index 19bb0044be..3c7d7b85a1 100644
--- a/library/utilities/fireball
+++ b/library/utilities/fireball
@@ -259,7 +259,8 @@ def main():
             port=dict(required=False, default=5099),
             password=dict(required=True),
             minutes=dict(required=False, default=30),
-        )
+        ),
+        supports_check_mode=True
     )
 
     password  = base64.b64decode(module.params['password'])