diff --git a/subjects/trimatoi.en.md b/subjects/trimatoi.en.md
index 31496b22..ba6571cf 100644
--- a/subjects/trimatoi.en.md
+++ b/subjects/trimatoi.en.md
@@ -8,6 +8,8 @@
 
 -   This function will **only** have to return the `int`. In case of invalid input, the function should return `0`.
 
+-   Note: There will never be more than one sign by string in the tests.
+
 ### Expected function
 
 ```go