diff --git a/lib/temporal/testing/local_workflow_context.rb b/lib/temporal/testing/local_workflow_context.rb
index 7d3321ae..b7036e92 100644
--- a/lib/temporal/testing/local_workflow_context.rb
+++ b/lib/temporal/testing/local_workflow_context.rb
@@ -199,9 +199,11 @@ def wait_for_any(*futures)
       end
 
       def wait_until(&unblock_condition)
-        raise 'You must pass an unblock condition block to wait_for' if unblock_condition.nil?
+        raise 'You must pass an unblock condition block to wait_until' if unblock_condition.nil?
 
-        Fiber.yield until unblock_condition.call
+        Fiber.new do
+          Fiber.yield until unblock_condition.call
+        end.resume
 
         return
       end