diff --git a/src/gc_content/gc_content.py b/src/gc_content/gc_content.py
index fc4365e2414fd3417595357dd512ae8f47f1d8cd..b34e87184168e2f2ac3bc0d784f9b77f4736a1c4 100644
--- a/src/gc_content/gc_content.py
+++ b/src/gc_content/gc_content.py
@@ -77,7 +77,7 @@ def get_many_gc_content(bed_line: List[Any], dic_seq: Fasta,
     {'interval': 50.0}
     >>> get_many_gc_content(["chr1", 10, 20, "s1", ".", "+"],
     ... dic_seq, 10)
-    {'before': 10.0, 'interval': 50.0, 'after': 0.0}
+    {'before': 100.0, 'interval': 50.0, 'after': 0.0}
     >>> get_many_gc_content(["chr1", 10, 20, "s1", ".", "-"],
     ... dic_seq, 10)
     {'before': 0.0, 'interval': 50.0, 'after': 100.0}