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diff --git a/llvm/docs/TestSuiteGuide.md b/llvm/docs/TestSuiteGuide.md
index 85623da080ed..9d43e1a345ff 100644
--- a/llvm/docs/TestSuiteGuide.md
+++ b/llvm/docs/TestSuiteGuide.md
@@ -71,6 +71,9 @@ MicroBenchmarks/XRay microbenchmarks, you need to add `compiler-rt` to your
PASS: test-suite :: MultiSource/Applications/ALAC/encode/alacconvert-encode.test (2 of 474)
...
```
+**NOTE!** even in the case you only want to get the compile-time results(code size, llvm stats etc),
+you need to run the test with the above `llvm-lit` command. In that case, the *results.json* file will
+contain compile-time metrics.
6. Show and compare result files (optional):