diff --git a/README.md b/README.md
index 4938544e313f12682ba33e818200dd0ecb754fd2..7cfef50e0049dfe762ca9277c8cbd60a4d82fdf5 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+[NOTE: This tool is tested on Windows. When parsing test smells from test cases on OSX, Linux, or Ubuntu, it skips some folders]
 # FlakinessDetector
 ## Workflow
 ![results](pic/system%20workflow.png) 
@@ -338,4 +339,4 @@ For example, when test failed and our tool marked it either flaky or non-flaky,
    You need to update multi-factor detection results after updating the training dataset,
    use the following command to update the results.
    
-    command: python update.py --update results
\ No newline at end of file
+    command: python update.py --update results