diff --git a/src/jit-format/jit-format.cs b/src/jit-format/jit-format.cs
index 357344cc..036bd91f 100644
--- a/src/jit-format/jit-format.cs
+++ b/src/jit-format/jit-format.cs
@@ -615,7 +615,10 @@ public static bool RunClangTidy(List<string> filenames, string compileCommands,
             {
                 Parallel.ForEach(filenames, (filename) =>
                     {
-                        formatOk &= DoClangTidyInnerLoop(fix, ignoreErrors, checks, compileCommands, filename, verbose);
+                        if (!DoClangTidyInnerLoop(fix, ignoreErrors, checks, compileCommands, filename, verbose))
+                        {
+                            formatOk = false;
+                        }
                     });
             }