diff --git a/README.md b/README.md
index 90450817881b2e798c0d9f39c64689bbd8981e27..7afc2fbcf1c6be3ee60182489b06bd365a06d153 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,8 @@ You are to implement this function.
 
 Note: Make sure to handle extreme cases (e.g., no input tuples for the joins or SetMinus, etc.)
 
+### Testing
+As discussed above, you can use `testing_X.py` for some testing, but it is not guaranteed to test all cases. We will provide correct output within a day or two. 
 ### Submission
 We will test those in an automated fashion, using a set of test cases. You *must* use the below command to create your submission.
 We will provide a sample dataset soon.