diff --git a/src/mult-test.py b/src/mult-test.py
index 4887d00..f633341 100644
--- a/src/mult-test.py
+++ b/src/mult-test.py
@@ -24,4 +24,4 @@ for x in range(top_value):
 if len(errors) == 0:
     print("Testing finished, no miscalculations detected.\nIt's safe to use!")
 else:
-    print("Testing failed with {len(errors)} errors.")
+    print(f"Testing failed with {len(errors)} errors.")