diff --git a/src/tools/compiletest/src/runtest/ui.rs b/src/tools/compiletest/src/runtest/ui.rs
index d683a325c8666..c0adb6302e9d0 100644
--- a/src/tools/compiletest/src/runtest/ui.rs
+++ b/src/tools/compiletest/src/runtest/ui.rs
@@ -207,8 +207,12 @@ impl TestCx<'_> {
 
         debug!(
             "run_ui_test: explicit={:?} config.compare_mode={:?} \
-               proc_res.status={:?} props.error_patterns={:?}",
-            explicit, self.config.compare_mode, proc_res.status, self.props.error_patterns
+               proc_res.status={:?} props.error_patterns={:?} output_to_check={:?}",
+            explicit,
+            self.config.compare_mode,
+            proc_res.status,
+            self.props.error_patterns,
+            output_to_check,
         );
 
         // Compiler diagnostics (expected errors) are always tied to the compile-time ProcRes.