diff --git a/spec/dsl/root_example_group_builder_spec.cr b/spec/dsl/root_example_group_builder_spec.cr
index 4aa956c..14a4e3c 100644
--- a/spec/dsl/root_example_group_builder_spec.cr
+++ b/spec/dsl/root_example_group_builder_spec.cr
@@ -188,7 +188,7 @@ describe Spectator::DSL::RootExampleGroupBuilder do
       end
       group = builder.build(Spectator::Internals::SampleValues.empty)
       group.children.all? do |child|
-        case(child)
+        case (child)
         when Spectator::Example
           child.group == group
         when Spectator::NestedExampleGroup