diff --git a/spec/compiler/semantic/generic_class_spec.cr b/spec/compiler/semantic/generic_class_spec.cr
index 540a717f66bf..85f215e1a3f6 100644
--- a/spec/compiler/semantic/generic_class_spec.cr
+++ b/spec/compiler/semantic/generic_class_spec.cr
@@ -636,7 +636,11 @@ describe "Semantic: generic class" do
     begin
       semantic(nodes)
     rescue ex : TypeException
-      msg = ex.to_s.lines.map(&.strip)
+      p ex
+      msg = ex.to_s.lines # .map(&.strip)
+      p msg
+      msg_with_strip = ex.to_s.lines.map(&.strip)
+      p msg_with_strip
       msg.count("- Foo(T).foo(x : Int32)").should eq(1)
     end
   end