diff --git a/programs/client/Client.cpp b/programs/client/Client.cpp
index c4954fa51cc..c5b579f2046 100644
--- a/programs/client/Client.cpp
+++ b/programs/client/Client.cpp
@@ -1390,6 +1390,9 @@ private:
                         {
                             fmt::print(stderr, "The query formatting is broken. Got the following (different) text after formatting the fuzzed query and parsing it back:\n'{}'\n, expected:\n'{}'\n",
                                 formatted_twice, fuzzed_text);
+                            fmt::print(stderr, "AST parsed back:\n'{}'\nSource AST:\n'{}'\n",
+                                parsed_formatted_query->dumpTree(),
+                                ast_to_process->dumpTree());
 
                             exit(1);
                         }