diff --git a/src/subject.ts b/src/subject.ts
index 256a783..1ca8edf 100644
--- a/src/subject.ts
+++ b/src/subject.ts
@@ -101,7 +101,7 @@ const getSubjectFromPath = async (
     if (stat.isFile()) {
       if (files.length >= MAX_SUBJECT_COUNT) {
         throw new Error(
-          `Too many subjects specified (at least ${files.length + 1}). The maximum number of subjects is ${MAX_SUBJECT_COUNT}.`
+          `Too many subjects specified (>${MAX_SUBJECT_COUNT}). The maximum number of subjects is ${MAX_SUBJECT_COUNT}.`
         )
       }
       files.push(p)